Validating the use of Medicare Australia billing data to examine trends in skin cancer

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Several studies employ the use of Medical Australia (MA) rebate data in assessing such trends, the validity of which has not been studied in the past. Conversely, melanoma skin cancer is a notifiable disease, and thus, MA and cancer registry data is readily available. The aim of the current study is to assess the use of MA for epidemiological measures for skin cancers, by using melanoma as a disease sample. Methods: Following ethics approval, data from MA and Victorian Cancer Registry (VCR) from 2004-2008 were extracted. Incidence of MA and VCR unique melanoma cases were compared and stratified by age and local government area (LGA). Regression and a paired-samples t-test were performed. Results: During the study period; 15,150 and 13,886 unique melanoma patients were identified through VCR and MA data sources respectively. An outlier in the >80­ year age group was noted between MA and VCR data. When stratified by age, significant correlation between MA and VCR was observed for all patients (gradient 0.91, R²= 0.936) and following exclusion of >80 patients (gradient 0.96, R²= 0.995). When stratified by LGA, a high degree of observation was observed for all patients (gradient 0.94, R²= 0.977) and following exclusion of >80 patients (gradient 0.996, R²= 0.975). Conclusion: Despite the inclusion of outlier data groups, acceptable correlation between MA and VCR melanoma data was observed, suggesting that MA may be suitable for assessing epidemiological trends. Such principals may be used to validate the use of MA data for similar calculations assessing NMSC trends." } { "@context": "http://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": "1", "item": { "@id": "https://f1000research.com/", "name": "Home" } }, { "@type": "ListItem", "position": "2", "item": { "@id": "https://f1000research.com/browse/articles", "name": "Browse" } }, { "@type": "ListItem", "position": "3", "item": { "@id": "https://f1000research.com/articles/4-1341/v1", "name": "Validating the use of Medicare Australia billing data to examine trends..." } } ] } Home Browse Validating the use of Medicare Australia billing data to examine trends... ALL Metrics - Views Downloads Get PDF Get XML Cite How to cite this article Perera E, Gnaneswaran N, Perera M and Sinclair R. Validating the use of Medicare Australia billing data to examine trends in skin cancer [version 1; peer review: 2 approved] . F1000Research 2015, 4 :1341 ( https://doi.org/10.12688/f1000research.7161.1 ) NOTE: If applicable, it is important to ensure the information in square brackets after the title is included in all citations of this article. Close Copy Citation Details Export Export Citation Sciwheel EndNote Ref. Manager Bibtex ProCite Sente EXPORT Select a format first Track Share ▬ ✚ Research Article Validating the use of Medicare Australia billing data to examine trends in skin cancer [version 1; peer review: 2 approved] Eshini Perera 1,2,5 , Neiraja Gnaneswaran 3 , Marlon Perera 4 , Rodney Sinclair https://orcid.org/0000-0001-6751-1428 2,5 Eshini Perera 1,2,5 , Neiraja Gnaneswaran 3 , Marlon Perera 4 , Rodney Sinclair https://orcid.org/0000-0001-6751-1428 2,5 PUBLISHED 24 Nov 2015 Author details Author details 1 Cancer Council Victoria, Melbourne, Australia 2 Faculty of Medicine, Dentistry and Health Science, University of Melbourne, Parkville, Australia 3 Plastic Surgery, Royal Brisbane Hospital, Brisbane, Australia 4 School of Medicine, University of Queensland, Brisbane, Australia 5 Sinclair Dermatology, Melbourne, Australia OPEN PEER REVIEW DETAILS REVIEWER STATUS Abstract Background: Epidemiological data surrounding non-melanomatous skin cancer (NMSC) is highly variable, in part due to the lack of government cancer registries. Several studies employ the use of Medical Australia (MA) rebate data in assessing such trends, the validity of which has not been studied in the past. Conversely, melanoma skin cancer is a notifiable disease, and thus, MA and cancer registry data is readily available. The aim of the current study is to assess the use of MA for epidemiological measures for skin cancers, by using melanoma as a disease sample. Methods: Following ethics approval, data from MA and Victorian Cancer Registry (VCR) from 2004-2008 were extracted. Incidence of MA and VCR unique melanoma cases were compared and stratified by age and local government area (LGA). Regression and a paired-samples t-test were performed. Results: During the study period; 15,150 and 13,886 unique melanoma patients were identified through VCR and MA data sources respectively. An outlier in the >80­ year age group was noted between MA and VCR data. When stratified by age, significant correlation between MA and VCR was observed for all patients (gradient 0.91, R²= 0.936 ) and following exclusion of >80 patients (gradient 0.96, R²= 0.995 ). When stratified by LGA, a high degree of observation was observed for all patients (gradient 0.94, R²= 0.977 ) and following exclusion of >80 patients (gradient 0.996, R²= 0.975 ). Conclusion: Despite the inclusion of outlier data groups, acceptable correlation between MA and VCR melanoma data was observed, suggesting that MA may be suitable for assessing epidemiological trends. Such principals may be used to validate the use of MA data for similar calculations assessing NMSC trends. READ ALL READ LESS Keywords Nonmelanoma skin cancer, Dermatology incidence, epidemiology, melanoma, medicare Corresponding Author(s) Eshini Perera ( [email protected] ) Close Corresponding author: Eshini Perera Competing interests: No competing interests were disclosed. Grant information: The author(s) declared that no grants were involved in supporting this work. Copyright: © 2015 Perera E et al . This is an open access article distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. How to cite: Perera E, Gnaneswaran N, Perera M and Sinclair R. Validating the use of Medicare Australia billing data to examine trends in skin cancer [version 1; peer review: 2 approved] . F1000Research 2015, 4 :1341 ( https://doi.org/10.12688/f1000research.7161.1 ) First published: 24 Nov 2015, 4 :1341 ( https://doi.org/10.12688/f1000research.7161.1 ) Latest published: 24 Nov 2015, 4 :1341 ( https://doi.org/10.12688/f1000research.7161.1 ) Introduction Non-melanoma skin cancers (NMSC) are the most commonly diagnosed cancer in Australia. In Australia, excluding Tasmania, no government cancer registries record information regarding NMSC 1 . Incidence and prevalence data surrounding NMSC is difficult to collect and results are highly variable 2 – 4 . Previously in Australia, NMSC epidemiological data has been obtained through large-scale prospective surveys and clinical examinations 1 , 3 – 21 . Recently, studies examining the costs and rates of NMSC services have employed the use of the Medicare Australia (MA) database of item numbers billed 2 , 22 . Furthermore, studies examining other cancer trends also examine MA data in a similar way 23 – 25 . The MA data source has the potential to provide a very large amount of information concerning skin cancer trends in Australia. No previous study has validated the use of MA data for epidemiological cancer calculations. Thus there is a need to demonstrate that the level of ascertainment of cases captured by MA is sufficient to allow for meaningful research of skin cancer using this dataset. In Australia, melanoma is a notifiable cancer, with state-based cancer registry data 26 . Further, MA billing data exists for the management of malignant melanoma. The availability of such data provides the possibility of validating the use of MA data for epidemiological measures of melanoma. The aim of this study was to assess the accuracy of MA’s Medical Benefits Schedule (MBS) rebate data for incidence and patterns of melanoma skin cancer in Australia. The methodology used to validate the use of MA to calculate incidence may represent the possibility of using MA data to examine other types of skin cancer trends in Australia. Methodology The Human Resources and Ethics Committee (HREC) granted approval to the Cancer Council of Victoria (CCV) on 1/10/2008 by the Department of Health and Ageing and was given the reference number 2008/CO004599. Ethics approval was for the use of MA data to be examined by the CCV for epidemiological purposes. Access to the Victorian Cancer Registry (VCR) dataset was released under the ‘Memorandum of Understanding.’ The data release was approved by the Director of the VCR on 9/7/2013. HREC approval was not required because only aggregated de-identified data was requested. Patient selection and data collection The following item numbers pertaining to excision of malignant melanoma and in situ melanoma were extracted for use from the MA dataset: 31300, 31305, 31310, 31315, 31320, 31325, 31330, 31335. The data available for analysis included age group, gender, local government area (LGA) in which the patient was located, grouped location of tumour removal and tumour sizing (grouped as 20mm). The MA criteria for these item numbers includes excision of both malignant and in situ melanoma (labelled as ‘Hutchinson’s melanotic freckle’ in the MA definition) 27 , 28 . Melanomas that were both malignant and in situ were extracted from the VCR database for the period of 2004 to 2008. Melanoma data registered with the VCR over the years 2004 to 2008 was also extracted for use in the study. Data available included age of patient, gender, LGA, in situ or malignant tumour and thickness level of tumour. Lastly, population data, from the Australian Bureau of Statistics (ABS) was used. Population data for the years studied was extracted for each LGA in Victoria. The number of unique patients, that is, the number of different individuals requiring one or more melanoma treatment(s) was determined for the MA and VCR dataset. The number of unique patients in each LGA was then examined in the following components: VCR and MA dataset; VCR and MA dataset stratified by year; VCR and MA dataset stratified by gender; and VCR and MA dataset stratified by age group. Data analysis Ordinary least squares’ (OLS) regression was used to analyse both datasets in each of the stratifications. In all of the OLS regressions performed, the y -axis intercept ( b ) was never significantly different from zero. Therefore the simplest formula y = mx was used to describe the relationship between VCR and MA data across LGAs. Using the OLS regression method, the standard uncertainty in the gradient ( u(m) ) and the Pearson’s correlation coefficient squared (R 2 ) values were obtained. Incidence rates were calculated for each LGA with ABS data. The mean difference in incidence rates between the following ‘pairs’ were calculated across LGAs: VCR vs. MA incidence for each of the study years between 2004 and 2008; VCR vs. MA total population; VCR vs. MA incidence for males and females; and VCR vs MA incidence for each of the stratified age group: 0–19, 20–29, 30–39, 40–49, 50–59, 60–69, 70–79 and >80. The paired sample t-test was used to test whether the mean difference in incidence between each of these pairs was greater than zero. The mean difference for each VCR-MA pair calculated and the 95% confidence interval for each pair was produced. A 2-tail significance test was performed to determine if the mean difference was statistically significant. All statistical analysis was carried out by IBM SPSS v.20. Results A total of 15,150 unique patients with malignant melanoma and in situ melanomas were registered with the VCR between 2004 and 2008. During the same time period, MA was billed for 13,886 patients requiring melanoma treatment services. During the study period, the number of unique cases registered remained relatively stable for both datasets. During preliminary analysis it was noted that the number of melanoma cases did not correlate closely between both datasets in the 80+ year age group. Table 1 summarises the number of unique cases registered with VCR and MA resolved by gender and including and excluding patients in the 80+ year age group. Comparisons of both datasets stratified by age group revealed that the 80+ year age group was a clear visible outlier ( Figure 1 ). The standard of uncertainty was significant at ± 5% ( u(m) ±0.046). Despite the inclusion of the 80+ year age group, the correlation between both datasets remained relatively high at 94% (i.e R²= 0.936 ). The regression in the population stratified by age group after the exclusion of the 80+ year age group demonstrated an improvement to 99% correlation between both datasets. Table 1. Summary of VCR and MA melanoma data for Victoria during the period 2004–2007 by gender. Number of unique patients for all age groups and excluding the 80+ year age group are listed. VCR Number of unique patients MA Number of unique patients All age groups Excl. 80+ yr age group All age groups Excl. 80+ yr age group Gender #Patients % #Patients % #Patients % #Patients % Male 8231 54.3 6950 53.9 7319 52.7 6691 53.5 Female 6919 45.7 5933 46.1 6567 47.3 5824 46.5 Total 15150 100.0 12883 100.0 13886 100.0 12515 100.0 Figure 1. OLS regression of MA data against VCR data – stratified by age. ( a ) including all patients ( b ) excluding patients >80 years old. When stratified by LGA, comparisons of the VCR and MA datasets showed a close mapping when OLS regression was performed using both datasets in their entirety and when stratified by gender ( Figure 2 ). The gradient remained close to unity ( m= 0.976 for the total dataset, m =0.905 for males and m= 0.972 for females) with only a small standard of uncertainty (≈ u(m)±0.01). The R ² values of 0.977, 0.979 and 0.967 respectively indicated a 97% correlation between the two datasets when all unique patients and cases by males and females were compared. Figure 2. OLS regression of MA data against VCR melanoma data for the years 2004–2007 of all patients – stratified by LGA. ( a ) all patients ( b ) males ( c ) females. Statistical analysis was repeated on the entire dataset after excluding the 80+ year age group. Comparisons of the VCR and MA datasets after the exclusion of the 80+ year age group demonstrated a closer association between both datasets ( Figure 3 ). The gradient ( m =0.985) showed a closer degree of equivalence between the two datasets after this exclusion ( Figure 3 ). The R² were largely unaffected by the exclusion of the age group demonstrating that the correlation was high in both the male and female populations, regardless of the exclusion of the 80+ age group. Figure 3. OLS regression of MA data against VCR melanoma data for the years 2004–2007, excluding patients >80 years old – stratified by LGA. ( a ) all patients ( b ) males ( c ) females. The mean incidence data for the age groups 20–29, 30–39, 40–49 and 60–69 showed no statistical significance in the mean difference. The magnitude of mean difference for the remaining pairs was relatively low for patients in the 0–19, 50–59 and 70–79 year age group ( Figure 4 ). Figure 4. Plot diagram of VCR and MA mean difference incidence values for melanoma. Each data point represents the difference between the VCR and MA mean values for melanoma incidence. The uncertainty bars represent the 95% confidence interval. Discussion Examining the ascertainment level MA MBS billing data for melanoma treatment is one step towards exploiting the vast body of epidemiological information collected on skin cancers by MA. In addition it has the potential for exploring other diseases which do not have mandatory reporting. The MA and VCR databases were examined looking at melanoma skin cancer. The findings of this study illustrate that the number of cases picked up by MA is comparable to the number of melanomas (malignant and in situ ) registered with the VCR in patients above the age of 19 and below the age of 80 years old. Incidence values were also found to be similar in both datasets. This suggests that MA data may potentially be useful in examining melanoma trends. Furthermore, the findings represent the possibility of using this billing data to examine other types of skin cancer trends in Australia. This study employed the use of VCR data, a large dataset for melanomas in Victoria. Mandatory reporting of melanomas is required in Australia and incidence and patterns are almost completely captured by population-based cancer registries 26 . The large sample size of this dataset and variety of parameters (gender, age and LGA) strengthens the evaluation of the MA dataset. Overall, both the VCR and MA datasets showed a correlation when compared by year, gender and age. The 80+ year age group however was identified as a clear outlier. A potential reason for the discrepancy is the number of patients over the age of 80 who are billed by the Department of Veterans Affairs (DVA). Veterans, members of the Australian Defence Force and their spouses are eligible for a DVA health card which pays benefits for health care, pharmaceutical therapies and travel 29 . Information regarding melanoma benefits paid by DVA was not included in the MA dataset. This study is limited by the broad definitions of the MA item numbers. The melanoma item numbers used in this study covered the excision of the following: malignant melanomas, in situ melanomas (listed as Hutchinson’s freckle), appendageal carcinomas, malignant fibrous tumours of skin and Merkel cell carcinomas (MCC) 27 . However the incidence rates of appendageal carcinomas, malignant fibrous tumours and MCC are low as these cancers are relatively rare 30 , 31 . Whilst no data exists on the exact figures of MCC Australia wide or within Victoria, estimates of 1 per 10 5 men and 0.63 per 10 5 women have been produced in a study in Western Australia 30 . These low rates would not significantly affect the statistical results of this study and consequently the comparison between the MA item numbers and the VCR data was justified. However, the rates of MCC, fibrous tumours, malignant fibrous tumours and appendage carcinomas rise with age 30 . In patients above the age of 85 the rates of MCC are much higher than the general population, occurring in 15.5 in 10 5 people 30 . The increase in these rarer skin cancers in the older age groups may also explain the discrepancy in the 80+ year age group. The analysis was conducted after excluding the 80+ year age group and this yielded a higher correlation. Furthermore, while melanomas are required to be histologically confirmed by MA, NMSC are not. GPs are required to obtain histological confirmation, in the case of an excision. Specialists, however, are permitted to bill MA without histological confirmation. This could potentially result in an over-estimate of lesions. Similarly, lesions that are treated with cryotherapy do not require histological verification, and this may also have resulted in an over-estimation by both GPs and specialists. Since reporting of melanoma is mandatory by law, the data captured by cancer registries is therefore assumed to be sufficiently accurate to use for comparison purposes. Several epidemiological studies examining cancer databases compared capture rates to central cancer registries to determine ascertainment levels 32 , 33 . There are no figures published on the completeness of the VCR data. However, a study on the National Cancer Registry in Britain, which used a two-source capture-recapture method to estimate the number of cases in Britain and the fraction of registered patients, determined that the registry was 97–98% complete for melanoma registration; the assumption is that the capture rate in Australia would be similar 32 . MA has the potential to be used in order to examine NMSC trends. This potential could be explored further. NMSC are captured by registry within Tasmania and there is possibility of comparing MA data to NMSC registry data within Tasmania to further establish the ascertainment of MA 1 . There is a paucity of data on incidence trends in pre-cancerous lesions such as actinic keratosis (AK) 34 . Analysis of item numbers pertaining to the treatment of AK may potentially provide insight into these rates 34 . Furthermore, longitudinal analysis of these lesions may help identify whether the introduction of newer agents including field treatments are more cost effective in treating AK. Conclusion The current study explores the capture rate of MA for determining melanoma rate. The findings suggest that despite the inclusion of outlying patient groups, MA rebate data correlates closely with VCR data when assessing incidence calculation and other epidemiological measures for melanoma. NMSCs are not currently required to be reported to Australian cancer registries and thus use of such data may be used to capture NMSC cases, which represents a cost-effective method to establish trends. Longitudinal studies examining incidence trends and trends in residual and recurrent NMSC over several decades can examine the effectiveness of public health campaigns and consequential savings for future governments. Data availability Raw datasets for MA and VCR are not available as they contain confidential information that cannot be deidentified. This data can be obtained by applying to the registry (MA or VCR) for access. Some data about melanoma for the specific time period analysed is available from: http://medicarestatistics.humanservices.gov.au/statistics/mbs_item.jsp . This data includes the number of times an item number is billed, but does not provide unique identifiers (such as date of birth or location). Author contributions EP: drafting of manuscript, data cleaning and analysis; NG: drafting of manuscript; MP: drafting of manuscript, review of analysis; RS: supervisor of project and review of manuscript. Competing interests No competing interests were disclosed. Grant information The author(s) declared that no grants were involved in supporting this work. Faculty Opinions recommended References 1. Kaldor J, Shugg D, Young B, et al. : Non-melanoma skin cancer: ten years of cancer-registry-based surveillance. Int J Cancer. 1993; 53 (6): 886–91. PubMed Abstract | Publisher Full Text 2. Fransen M, Karahalios A, Sharma N, et al. : Non-melanoma skin cancer in Australia. Med J Aust. 2012; 197 (10): 565–8. PubMed Abstract | Publisher Full Text 3. Staples MP, Elwood M, Burton RC, et al. : Non-melanoma skin cancer in Australia: the 2002 national survey and trends since 1985. Med J Aust. 2006; 184 (1): 6–10. PubMed Abstract 4. 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Reference Source 27. Medicare Australia: MBS Online Medicare Benefits Schedule. 2014. Reference Source 28. Australian Bureau of Statistics: Australia's Population. 2014. Reference Source 29. Department of Veterans Affairs: Benefits & Services. 2014. Reference Source 30. Girschik J, Thorn K, Beer TW, et al. : Merkel cell carcinoma in Western Australia: a population-based study of incidence and survival. Br J Dermatol. 2011; 165 (5): 1051–7. PubMed Abstract | Publisher Full Text 31. Laureano A, Cunha D, Pernandes C, et al. : Dermoscopy in Merkel cell carcinoma: a case report. Dermatol Online J. 2014; 20 (2): pii: doj_21543. PubMed Abstract 32. Kroll ME, Murphy MF, Carpenter LM, et al. : Childhood cancer registration in Britain: capture-recapture estimates of completeness of ascertainment. Br J Cancer. 2011; 104 (7): 1227–33. PubMed Abstract | Publisher Full Text | Free Full Text 33. Freeman JL, Zhang D, Freeman DH, et al. : An approach to identifying incident breast cancer cases using Medicare claims data. J Clin Epidemiol. 2000; 53 (6): 605–14. PubMed Abstract | Publisher Full Text 34. Perera E, McGuigan S, Sinclair R: Cost for the treatment of actinic keratosis on the rise in Australia [version 2; referees: 2 approved]. F1000Res. 2014; 3 : 184. PubMed Abstract | Publisher Full Text | Free Full Text Comments on this article Comments (0) Version 1 VERSION 1 PUBLISHED 24 Nov 2015 ADD YOUR COMMENT Comment Author details Author details 1 Cancer Council Victoria, Melbourne, Australia 2 Faculty of Medicine, Dentistry and Health Science, University of Melbourne, Parkville, Australia 3 Plastic Surgery, Royal Brisbane Hospital, Brisbane, Australia 4 School of Medicine, University of Queensland, Brisbane, Australia 5 Sinclair Dermatology, Melbourne, Australia Competing interests No competing interests were disclosed. Grant information The author(s) declared that no grants were involved in supporting this work. Article Versions (1) version 1 Published: 24 Nov 2015, 4:1341 https://doi.org/10.12688/f1000research.7161.1 Copyright © 2015 Perera E et al . This is an open access article distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Download Export To Sciwheel Bibtex EndNote ProCite Ref. Manager (RIS) Sente metrics Views Downloads F1000Research - - PubMed Central info_outline Data from PMC are received and updated monthly. - - Citations open_in_new 0 open_in_new 0 open_in_new SEE MORE DETAILS CITE how to cite this article Perera E, Gnaneswaran N, Perera M and Sinclair R. Validating the use of Medicare Australia billing data to examine trends in skin cancer [version 1; peer review: 2 approved] . F1000Research 2015, 4 :1341 ( https://doi.org/10.12688/f1000research.7161.1 ) NOTE: If applicable, it is important to ensure the information in square brackets after the title is included in all citations of this article. COPY CITATION DETAILS track receive updates on this article Track an article to receive email alerts on any updates to this article. TRACK THIS ARTICLE Share Open Peer Review Current Reviewer Status: ? Key to Reviewer Statuses VIEW HIDE Approved The paper is scientifically sound in its current form and only minor, if any, improvements are suggested Approved with reservations A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit. Not approved Fundamental flaws in the paper seriously undermine the findings and conclusions Version 1 VERSION 1 PUBLISHED 24 Nov 2015 Views 0 Cite How to cite this report: Hönigsmann H. Reviewer Report For: Validating the use of Medicare Australia billing data to examine trends in skin cancer [version 1; peer review: 2 approved] . F1000Research 2015, 4 :1341 ( https://doi.org/10.5256/f1000research.7717.r12365 ) The direct URL for this report is: https://f1000research.com/articles/4-1341/v1#referee-response-12365 NOTE: it is important to ensure the information in square brackets after the title is included in this citation. Close Copy Citation Details Reviewer Report 11 Feb 2016 Herbert Hönigsmann , Department of Dermatology, Division of Special & Environmental Dermatology, Medical University of Vienna, Vienna, Austria Approved VIEWS 0 https://doi.org/10.5256/f1000research.7717.r12365 This report is well-written and appears sound. It is quite difficult to find ... Continue reading READ ALL This report is well-written and appears sound. It is quite difficult to find appropriate statistic material on skin cancers in many countries. I see no problems. Competing Interests: No competing interests were disclosed. I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard. Close READ LESS CITE CITE HOW TO CITE THIS REPORT Hönigsmann H. Reviewer Report For: Validating the use of Medicare Australia billing data to examine trends in skin cancer [version 1; peer review: 2 approved] . F1000Research 2015, 4 :1341 ( https://doi.org/10.5256/f1000research.7717.r12365 ) The direct URL for this report is: https://f1000research.com/articles/4-1341/v1#referee-response-12365 NOTE: it is important to ensure the information in square brackets after the title is included in all citations of this article. COPY CITATION DETAILS Report a concern Respond or Comment COMMENT ON THIS REPORT Views 0 Cite How to cite this report: Abdel-Naser MBHT. Reviewer Report For: Validating the use of Medicare Australia billing data to examine trends in skin cancer [version 1; peer review: 2 approved] . F1000Research 2015, 4 :1341 ( https://doi.org/10.5256/f1000research.7717.r11331 ) The direct URL for this report is: https://f1000research.com/articles/4-1341/v1#referee-response-11331 NOTE: it is important to ensure the information in square brackets after the title is included in this citation. Close Copy Citation Details Reviewer Report 03 Dec 2015 Mohamed Badawy Hassan Tawfik Abdel-Naser , Klinik für Dermatologie, Venerologie und Allergologie Städtisches Klinikum Dessau, Dessau, Germany Approved VIEWS 0 https://doi.org/10.5256/f1000research.7717.r11331 The study is well designed and the results are convincing. The authors mentioned that the time period of data collection is from 2004 to 2008 which means 5 years (year 2008 is included). However in the table and figures the mentioned ... Continue reading READ ALL The study is well designed and the results are convincing. The authors mentioned that the time period of data collection is from 2004 to 2008 which means 5 years (year 2008 is included). However in the table and figures the mentioned period was from 2004 to 2007 which means 4 year. Perhaps authors need to clarify this issue. Competing Interests: No competing interests were disclosed. I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard. Close READ LESS CITE CITE HOW TO CITE THIS REPORT Abdel-Naser MBHT. Reviewer Report For: Validating the use of Medicare Australia billing data to examine trends in skin cancer [version 1; peer review: 2 approved] . F1000Research 2015, 4 :1341 ( https://doi.org/10.5256/f1000research.7717.r11331 ) The direct URL for this report is: https://f1000research.com/articles/4-1341/v1#referee-response-11331 NOTE: it is important to ensure the information in square brackets after the title is included in all citations of this article. COPY CITATION DETAILS Report a concern Respond or Comment COMMENT ON THIS REPORT Comments on this article Comments (0) Version 1 VERSION 1 PUBLISHED 24 Nov 2015 ADD YOUR COMMENT Comment keyboard_arrow_left keyboard_arrow_right Open Peer Review Reviewer Status info_outline Alongside their report, reviewers assign a status to the article: Approved The paper is scientifically sound in its current form and only minor, if any, improvements are suggested Approved with reservations A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit. Not approved Fundamental flaws in the paper seriously undermine the findings and conclusions Reviewer Reports Invited Reviewers 1 2 Version 1 24 Nov 15 read read Mohamed Badawy Hassan Tawfik Abdel-Naser , Venerologie und Allergologie Städtisches Klinikum Dessau, Dessau, Germany Herbert Hönigsmann , Medical University of Vienna, Vienna, Austria Comments on this article All Comments (0) Add a comment Sign up for content alerts Sign Up You are now signed up to receive this alert Browse by related subjects keyboard_arrow_left Back to all reports Reviewer Report 0 Views copyright © 2016 Hönigsmann H. This is an open access peer review report distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 11 Feb 2016 | for Version 1 Herbert Hönigsmann , Department of Dermatology, Division of Special & Environmental Dermatology, Medical University of Vienna, Vienna, Austria 0 Views copyright © 2016 Hönigsmann H. This is an open access peer review report distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. format_quote Cite this report speaker_notes Responses (0) Approved info_outline Alongside their report, reviewers assign a status to the article: Approved The paper is scientifically sound in its current form and only minor, if any, improvements are suggested Approved with reservations A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit. Not approved Fundamental flaws in the paper seriously undermine the findings and conclusions This report is well-written and appears sound. It is quite difficult to find appropriate statistic material on skin cancers in many countries. I see no problems. Competing Interests No competing interests were disclosed. I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard. reply Respond to this report Responses (0) Hönigsmann H. Peer Review Report For: Validating the use of Medicare Australia billing data to examine trends in skin cancer [version 1; peer review: 2 approved] . F1000Research 2015, 4 :1341 ( https://doi.org/10.5256/f1000research.7717.r12365) NOTE: it is important to ensure the information in square brackets after the title is included in this citation. The direct URL for this report is: https://f1000research.com/articles/4-1341/v1#referee-response-12365 keyboard_arrow_left Back to all reports Reviewer Report 0 Views copyright © 2015 Abdel-Naser M. This is an open access peer review report distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 03 Dec 2015 | for Version 1 Mohamed Badawy Hassan Tawfik Abdel-Naser , Klinik für Dermatologie, Venerologie und Allergologie Städtisches Klinikum Dessau, Dessau, Germany 0 Views copyright © 2015 Abdel-Naser M. This is an open access peer review report distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. format_quote Cite this report speaker_notes Responses (0) Approved info_outline Alongside their report, reviewers assign a status to the article: Approved The paper is scientifically sound in its current form and only minor, if any, improvements are suggested Approved with reservations A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit. Not approved Fundamental flaws in the paper seriously undermine the findings and conclusions The study is well designed and the results are convincing. The authors mentioned that the time period of data collection is from 2004 to 2008 which means 5 years (year 2008 is included). However in the table and figures the mentioned period was from 2004 to 2007 which means 4 year. Perhaps authors need to clarify this issue. Competing Interests No competing interests were disclosed. I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard. reply Respond to this report Responses (0) Abdel-Naser MBHT. Peer Review Report For: Validating the use of Medicare Australia billing data to examine trends in skin cancer [version 1; peer review: 2 approved] . F1000Research 2015, 4 :1341 ( https://doi.org/10.5256/f1000research.7717.r11331) NOTE: it is important to ensure the information in square brackets after the title is included in this citation. The direct URL for this report is: https://f1000research.com/articles/4-1341/v1#referee-response-11331 Alongside their report, reviewers assign a status to the article: Approved - the paper is scientifically sound in its current form and only minor, if any, improvements are suggested Approved with reservations - A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit. Not approved - fundamental flaws in the paper seriously undermine the findings and conclusions Adjust parameters to alter display View on desktop for interactive features Includes Interactive Elements View on desktop for interactive features Competing Interests Policy Provide sufficient details of any financial or non-financial competing interests to enable users to assess whether your comments might lead a reasonable person to question your impartiality. 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