Table 2.

Lifetime and 30-days prevalence of second-hand smoking exposure among pregnant women according to different sociodemographic characteristics.

Characteristics	Lifetime Second-Hand Smoking Exposure			30-Days Second-Hand Smoking Exposure
	n	%	p-Value	n	%	p-Value
Age group
18–25	112	94.9	0.41	76	67.9	0.07
26–30	186	93.0		111	59.7
31–35	70	88.6		53	75.7
>35	32	91.4		18	56.3
Educational attainment
<High school	12	75.0	0.02	6	50.0	0.41
High school	68	94.4		47	69.1
>High school	320	93.0		205	64.1
Occupation
Self-employed	110	91.7	0.87	71	64.6	0.74
Employed	244	93.1		155	63.5
Unemployed/Housewife	46	92.0		32	69.6
Living area
Urban	345	92.7	0.77	221	64.1	0.64
Rural	55	91.7		37	67.3
Gestation week
<30 weeks	153	93.9	0.33	98	64.1	0.55
30–37 weeks	186	93.0		124	66.7
>37 weeks	61	88.4		36	59.0