Table 1.

Distribution of participants by their years of study, sex, and current tobacco use [N=864]

Year of study	Sex	Medical				Nonmedical				Z, P Value
		Student	Using tobacco	Prevalence (%)	Z, P value	Student	Using tobacco	Prevalence (%)	Z, P value
1st year	M	57	19	33.3	−	79	42	53.2	−	**
	F	35	1	3.9	−	45	4	8.9	−	−
	T	92	20	21.7	*	124	46	37.1	*	2.5, 0.0124
2nd year	M	73	23	31.5	−	73	37	50.6	−	−
	F	39	0	0	−	33	4	12.1	−	−
	T	112	23	20.5	0.21, 0.836	106	41	38.7	0.25, 0.8026	2.9, 0.0038
3rd year	M	89	21	23.6	−	33	28	84.8	−	−
	F	43	2	4.7	−	20	2	10.0	−	−
	T	132	23	17.4	0.79, 0.4296	53	30	56.6	2.4, 0.0164	5.2, <0.002
4th year	M	95	23	24.2	−	19	15	78.9	−	−
	F	48	2	4.2	−	13	1	7.7	−	−
	T	143	25	17.4	0.74, 0.4594	32	16	50.0	1.3, 0.1936	3.5, <0.002
5th tear	M	27	3	11.1	−	23	17	73.9	−	−
	F	9	0	0	−	11	1	9.1	−	−
	T	36	3	8.3	2.12, 0.034	34	18	52.9	1.7, 0.0892	4.6, <0.002
Total	M	340	89	26.2	−	227	139	61.2	−	8.9, <0.002
	F	175	5	2.9	−	122	12	9.8	−	2.4, 0.0164
	T	515	94	18.3	−	349	151	43.3	−	7.9,<0.002

M, male; F, female; T, total;

^*Z test across the rows.

^**Z test across the columns