Table 2 Demographic characteristics and relevant covariates of study participants
Demographic outcome, mean (SD) | Total (N = 181) | No prenatal smoking (n = 152) | Prenatal smoking (n = 29) | p-value |
|---|---|---|---|---|
Maternal conception age (year) | 28.64 (5.62) | 28.38 (5.68) | 29.97 (5.19) | 0.17 |
Infant birthweight (kg) | 3.26 (0.57) | 3.29 (0.58) | 3.11 (0.52) | 0.15 |
SES | 3.07 (1.94) | 3.20 (1.92) | 2.35 (1.90) | 0.028 |
% (n) | % (n) | % (n) | ||
Race | 0.24 | |||
Black | 51.9 (94) | 88.3 (83) | 11.7 (11) | |
White | 37.0 (67) | 79.1 (53) | 20.9 (14) | |
Other | 11.1 (20) | 80.0 (16) | 20.0 (4) | |
Baby sex | 0.98 | |||
Male | 51.9 (94) | 84.0 (79) | 16.0 (15) | |
Female | 48.1 (87) | 83.9 (73) | 16.1 (14) | |
Pregnancy complications | 0.26 | |||
No | 82.3 (149) | 82.5 (123) | 17.5 (26) | |
Yes | 17.7 (32) | 90.6 (29) | 9.4 (3) | |
Maternal postnatal depression (18 months) | 0.26 | |||
No | 85.8 (133) | 88.0 (117) | 12.0 (16) | |
Yes | 14.2 (16) | 59.1 (13) | 40.9 (9) |