Association between Smoking and Body Mass Index among Males Aged 20 Years and Above - A Study in Rural Tamil Nadu, South India.

ABSTRACT

Objective: To investigate the relationship between smoking status and Body Mass Index (BMI) in men aged 20 years and above. Methods: A cross sectional study was conducted in the rural field practice area of Department of Community Medicine, PSG Institute of Medical Science and Research, Coimbatore during June and July 2010. A total of 459 men aged 20 years and above were included in the study. Statistical analyses were done using General Linear Model procedure of SPSS. Results: Cigarette smokers weighed (Kg) less, p<0.01 (age adjusted mean ± standard error = 58.64 ± 0.44) and were leaner, p<0.001 [age adjusted mean BMI (kg/m2) ± standard error = 21.13 ± 0.13] than ex/non-smokers (61.11 ± 0.69 and 22.19 ± 0.2 respectively). Regarding the intensity of smoking and BMI, light smokers (1 to 20 cigarettes per day) were leaner than ex/non smokers (mean ± standard error were 21.13 ± 0.13, 22.19 ± 0.208 respectively, p< 0.001). Regarding the duration of smoking and BMI, a linear diminution in BMI is observed with increasing duration of cigarettes smoking compared to ex/non smokers (mean ± standard error of BMI) for ex/non smokers 22.19 ± 0.208, 1 to 10 years of smoking 21.56 ± 0.221(p<0.05); 11 to 20 years of smoking 21.23 ± 0.256 (p<0.01); 21 to 30 years of smoking 20.30 ± 0.333 (p<0.001); 30 and above years of smoking 20.07 ± 0.501(p<0.001). Conclusion: We found significant results confirming an association between cigarette smoking and lower BMI in men.