[Effect of smoking cessation on body mass index, blood pressure and serum lipids in middle-aged male workers].

The purpose of this study was to examine the effects of smoking cessation on body mass index (BMI), blood pressure and serum lipids in middle-aged male workers considering the effect of BMI which would increase by smoking cessation. The subjects were 1431 middle-aged men who worked in an enterprise in Hiroshima prefecture. Cross-sectional data measured in 1989 and longitudinal data measured from 1985 to 1989 were used in this analysis. The effect of smoking cessation on BMI, blood pressure and serum lipids were evaluated by two models of analysis of covariance (PC-SAS: GLM procedure) for the cross-sectional data and longitudinal data. In analysis of the cross-sectional data, model 1 was controlled for BMI and model 2 was not controlled for BMI. In analysis of the longitudinal data, model 3 was controlled for BMI change and model 4 was not controlled for BMI change. The main results are summarized as follows: 1. BMI was increased over the short period by smoking cessation, but over the long period BMI of ex-smokers remained at almost the same level as non-smokers'. 2. Blood pressure was increased over the short period by both the effect of smoking cessation and BMI increase from abstention from smoking. But over the long period blood pressure of ex-smokers remained at almost the same level as non-smokers. 3. Triglycerides (TG) and atherogenic index (AI) tended to decrease and HDL-cholesterol (HDLC) tended to increase over the short period by smoking cessation, but the concomitant BMI increase may have blunted any independent beneficial effect of smoking cessation on TG, AI and HDLC. But over the long period TG, AI and HDLC of ex-smokers recovered to almost the same level as non-smokers', and remained at that level. 4. These results suggest that smoking cessation have beneficial effects for health promotion in middle-aged men.