The Influence of Low Birth Weight and Smoking on the Male Patients with Premature Coronary Heart Disease: a retrospective case-control study

Abstract Background: Low birth weight (LBW) is one of the risk factors for coronary heart disease (CHD). The association of LBW and other risk factors with male patients with premature CHD has not been fully determined. This study aims to assess the association of LBW and other risk factors with the incidence of male patients with premature CHD.Methods We identified hospitalized male patients with premature CHD (CHD group) and healthy male subjects (control group) from January 2013 to December 2018. The differences of demographics, birth weight (BW) and other traditional risk factors were compared between the CHD group and the control group and logistic regression was used to estimate their effects on the risk of premature CHD.Results A total of 384 male subjects were enrolled in the study (183 in the CHD group vs 201 in the control group). There were significant differences in BW, smoking, diabetes and hyperlipidemia between the two groups (2.98±0.35 vs 3.37±0.39kg, P<0.001, 73.22% vs 27.36%, P<0.001, 8.74% vs 3.48%, P=0.033, 53.55% vs 37.31%, P=0.001) respectively. The risk of premature CHD increased significantly with the LBW (OR=4.530, 95% CI：1.331-15.412，P=0.016) and smoking (OR=6.748, 95% CI：4.258-10.693，P<0.001) respectively according to the multivariate logistic regression model. Conclusion LBW and smoking are independently and positively correlated with male patients with premature CHD. A history of LBW should be paid particularly attention in younger men for primordial prevention of premature CHD, especially away from tobacco.