Table 1. Demographics of the study population .

Variable	Non-smokers (n=200)	Smokers (n=200)	P-value a
Gender Male Female	116 84	173 27	<0.001
Mean BMI (kg/m2) ± SD	22.7 ± 5.8	23.2 ± 4.1	0.368
Mean Age(years) ± SD	28.5 ± 11.1	37.4 ± 13.0	<0.000

BMI: Body Mass Index; SD: Standard Deviation

^aCalculated using chi-square for the categorical variables, and independent sample t-test for continuous variables; p-value <0.05 considered statistically significant