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Table 2 Demographic characteristics of the study sample, stratified by sex

From: Psychological distress and its correlates among dental students: a survey of 17 Colombian dental schools

	All respondents		Females		Males
	N	col. %	n	row %	n	row %	p-value^*
Total sample	5700	100	3961	69	1739	31
Study year							0.306
1^st	1369	24	959	70	410	30
2^nd	1308	23	918	70	390	30
3^rd	1190	21	796	67	394	33
4^th	1147	20	805	70	342	30
5^th	686	12	483	69	203	31
Studies funding sources							0.649
Own sources only	3302	58	2301	70	1001	30
Own sources and loans	1897	33	1321	70	576	30
Loans only	501	9	339	68	162	32
Working while studying							<0.0005
Yes	1035	18	635	61	400	39
No	4665	82	3326	71	1339	29
1 ^st career choice: Dentistry							0.120
Yes	3700	65	2597	70	1103	30
No	2000	35	1364	68	636	32
Socioeconomic level							0.043
1	379	7	245	65	134	35
2	1248	22	859	69	389	31
3	2366	42	1658	70	708	30
4	1099	19	752	68	347	32
5	442	8	319	72	123	28
6	166	3	128	77	38	23
Age (categorical)							<0.0005
Under 18	673	12	494	73	179	27
18- <21	2398	42	1722	72	676	28
21- <24	1804	32	1240	69	564	31
24 and older	825	14	505	61	320	39
Age (continuous)	Mean (SD)	Median (range)	Mean (SD)	Median (range)	Mean (SD)	Median (range)	<0.0005
	20.7(3.2)	20(15–54)	20.5(3.0)	20(15–53)	21.1(3.6)	21(15–54)

^* Chi-square test for categorical variables and t test for the continuous age variable.
SD = Standard Deviation.

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