Table 2.

The results of the perinatal outcomes in non-smoking women by exposure to SHS

Outcome	Exposure to SHS				P value
		Total number (1085) Yes		Total number (2341) No
Birth weight		3.15 ± 0.46		3.21 ± 0.46	0.002
Baby’s length		49.62 ± 3.09		49.87 ± 2.48	0.014
Head circumference		34.05 ± 1.59		34.14 ± 1.73	0.17
Apgar at 5 min		8.92 ± 0.64		8.91 ± 0.66	0.75
Apgar at 1 min		7.73 ± 0.86		7.75 ± 0.82	0.66
Low birth weight (<2500 gms)	1000*	54 (5.4)	2152*	99 (4.6)	0.36
NICU	1000*	45 (4.5)	2155*	97 (4.5)	0.79

*Total number in the variable excluding missing data.

Data are n (%) or means ± standard deviation.

Statistical tests used were student t test, chi-square test, and Fisher exact test.

SHS = Secondhand smoke. NICU = Neonatal intensive care unit.