Table 1.

Socio-demographic characteristics of study group and control groups

	Study group		Control group
	Frequency	Percent	Frequency	Percent
Marital status
Single	4	2.9	12	8.9
Married	119	88.1	112	82.9
Divorced	10	7.4	8	5.9
Widowed	2	1.5	3	2.2
Age (years)
18–25 (22.9 ± 2.0 years)	26	19.3	31	22.9
26–35 (30.5 ± 3.1 years)	74	54.8	83	61.5
≥ 36 (41.2 ± 4.2 years)	35	25.9	21	15.6
Educational level
Illiterate	19	14	28	20.7
Read and write	3	2.2	22	16.2
Primary school	44	32.6	48	35.5
≥ Secondary school education	69	51.1	37	27.4
Occupation
House wife	91	67.4	72	53.3
Working	44	32.6	63	46.7