Table 2.

Variables affecting initiation of smoking (new smokers) during 6 years of medical education.

Variables	n	New smokers	%	Relative risk	95% CI	p*
Gender
Female	37	8	21.6
Male	56	22	39.3	1.817	(0.91–3.64)	0.074
Family location
Urban	59	17	28.8
Rural	34	13	38.2	1.327	(0.74–2.38)	0.349
Other smokers among friends
No	65	16	24.6
Yes	28	14	50.0	2.031	(1.16–3.57)	0.016
Smoking family members
No	39	10	25.6
Yes	54	20	37.0	1.444	(0.76–2.73)	0.246
Tea consumption
No	6	3	50.0
Yes	87	27	31.0	0.621	(0.26–1.47)	0.383**
Alcohol use
No	84	27	32.1
Yes	9	3	33.3	1.037	(0.39–2.75)	1.0**
Coffee consumption
No	40	10	25.0
Yes	53	20	37.7	1.509	(0.80–2.86)	0.193
Boyfriend/girlfriend
No	59	16	27.1
Yes	34	14	41.2	1.518	(0.85–2.71)	0.163
Sports
Playing	13	4	30.8
Not playing	80	26	32.5	1.056	(0.44–2.53)	1.0**
Nutrition
Sufficient	73	20	27.4
Insufficient	20	10	50.0	1.825	(1.03–3.25)	0.05

*: Chi-square test, **: Fisher's exact test, %: individuals who started smoking during 6 years/total number of individuals, CI: confidence interval.