Table 1.
Maternal and infant characteristics, of women exposed and non-exposed to SHS
| Variable | Women non-exposed to SHS (N = 2433) | Women exposed to SHS (N = 798) | P value |
|---|---|---|---|
|
Maternal characteristics |
|
|
|
| Maternal age (year) |
29.53 ± 6.2 |
28.86 ± 6.1 |
0.008 |
| Parity |
3.01 ± 2.2 |
2.78 ± 2.1 |
0.008* |
| Primipara |
795 (31.8%) |
344 (41.4%) |
< 0.001 |
| Gestation age at booking (week) |
21.8 ± 8.8 |
22.2 ± 5.3 |
0.34 |
| BMI (kg/m2) |
29.45 ± 5.96 |
29.7 ± 6.04 |
0.23 |
| GDM |
354 (14.5%) |
114 (14.3%) |
0.85 |
| Pre-existing diabetes: |
|
|
|
| Type I |
9 (0.37%) |
6 (0.75%) |
0.20 |
| Type II |
7 (0.28%) |
5 (0.72%) |
0 .20 |
| Pregnancy induced hypertension |
29 (1.2%) |
11 (1.4%) |
0.68 |
| Preeclampsia |
17 (0.7%) |
5 (0.62%) |
0.83 |
|
Infant characteristics |
|
|
|
| Male, n (%) |
1303 (53.6%) |
412 (51.7%) |
0.36 |
| Gestational age (week) |
39.12 ± 1.19 |
39.12 ± 1.195 |
0.85 |
| Birth weight (kg) |
3.2 ± 0.45 |
3.15 ± 0.46 |
0.012* |
| Birth length (cm) |
49.89 ± 2.16 |
49.69 ± 2.27 |
0.029 |
| Head circumference (cm) |
34.26 ± 1.25 |
34.13 ± 1.21 |
0.011 |
| Macrosomia (≥ 4.0 kg) |
113 (4.64%) |
30 (3.75%) |
0.29 |
| Low birth weight (<2.5 kg) | 111 (4.56%) | 41 (5.14%) | 0.5 |
Mann–Whitney Test*.
Data expressed as either n (%) or mean ± standard deviation.
SHS = second-hand smoke, BMI = body mass index, GDM = gestational diabetes.
Bold figure indicates statistical significance.