Table 1.
Number, Age, Weight, and Total Sleep Time of Infants in Smoking and Nonsmoking Groups at Birth and the 3 Ages Studied
| Birth | 2-4 wk | 2-3 mo | 5-6 mo | |
|---|---|---|---|---|
| Infants, no (boys/girls) | ||||
| Smoking | 12 (6/6) | 11 (6/5) | 7 (3/4) | |
| Nonsmoking | 12 (3/9) | 11 (3/8) | 8 (3/5) | |
| Age | ||||
| Smoking | 40 ± 0.4 wk | 15 ± 1 d | 75 ± 2 d | 176 ± 5 d |
| Nonsmoking | 40 ± 0.3 wk | 14 ± 1 d | 74 ± 2 d | 189 ± 5 d |
| Weight, gm | ||||
| Smoking | 3598 ± 129 | 3886 ± 140 | 5805 ± 227 | 7935 ± 223 |
| Nonsmoking | 3498 ± 102 | 3709 ± 129 | 5453 ± 213 | 7865 ± 359 |
| Study Sleep Time, min | ||||
| Smoking | 178 ± 8 | 154 ± 13 | 72 ± 15 | |
| Nonsmoking | 157 ± 10 | 136 ± 12 | 96 ± 9 |
Data are presented as mean ( ± SEM) except group assignments, which are total number (boys/girls). Age at birth is gestational age.