Table 3.
Weight gain from repeated measures linear regression models for time-dependent follow-up pregnancy and birth groups stratified by race and baseline groups
| Black women: weight gain (kg); mean (95% CI) time-dependent follow-up pregnancy and birth groups |
White women: weight gain (kg); mean (95% CI) time-dependent follow-up pregnancy and birth groups |
|||||||
|---|---|---|---|---|---|---|---|---|
| Baseline groups | P0: no pregnancies (referent group) | P1: one or more short pregnancies | B1: one birth | B2: two or more births | P0: no pregnancies (referent group) | P1: one or more short pregnancies | B1: one birth | B2: two or more births |
| Overweight Nulliparous, n | 104 | 29 | 51 | 37 | 91 | 19 | 33 | 21 |
| Minimally adjusted | 8.7 (7.5, 9.9) | 11.2* (9.2, 13.3) | 11.5*** (9.9, 13.1) | 14.2*** (12.1, 16.4) | 4.5 (3.5, 5.5) | 10.3*** (8.3, 12.3) | 10.1*** (8.6, 11.6) | 11.0*** (8.9, 13.1) |
| Fully adjusted | 8.7 (7.5, 9.9) | 11.7** (9.5, 13.8) | 11.4** (9.8,13.0) | 13.5*** (11.3, 15.7) | 4.2 (3.2, 5.1) | 9.8*** (7.8, 11.8) | 8.9*** (7.3, 10.4) | 10.2*** (8.1, 12.4) |
| Normal weight Nulliparous, n | 141 | 40 | 96 | 51 | 325 | 77 | 137 | 131 |
| Minimally adjusted | 6.0 (5.0, 7.0) | 5.4 (3.7, 7.0) | 7.6* (6.4, 8.9) | 7.7 (5.9, 9.6) | 3.0 (2.5, 3.5) | 3.4 (2.4, 4.4) | 4.3*** (3.6, 5.1) | 3.1 (2.2, 4.1) |
| Fully adjusted | 6.0 (5.0, 6.9) | 5.6 (3.9, 7.3) | 7.4* (6.2, 8.7) | 7.9 (6.0, 9.8) | 3.2 (2.7, 3.7) | 3.6 (2.4, 4.9) | 4.1* (3.3, 4.8) | 2.9 (2.0, 3.9) |
| Overweight Parous, n | 123 | 25 | 66 | 26 | 40 | 8 | 12 | 1 |
| Minimally adjusted | 7.4 (6.3, 8.5) | 6.2 (3.8, 8.6) | 8.1 (6.6, 9.6) | 10.3* (7.6, 13.1) | 6.4 (4.5, 8.3) | 5.7 (1.6, 9.8) | 7.0 (3.0, 11.1) | NR |
| Fully adjusted | 7.2 (6.1, 8.3) | 6.1 (3.6, 8.6) | 8.1 (6.6, 9.6) | 9.3 (6.6, 12.0) | 7.2 (5.1, 9.2) | 3.8 (−0.7, 8.3) | 7.1 (2.9, 11.3) | NR |
| Normal weight parous, n | 110 | 33 | 88 | 33 | 42 | 18 | 42 | 20 |
| Minimally adjusted | 6.1 (5.0, 7.1) | 4.8 (2.9, 6.7) | 7.9* (6.6, 9.2) | 7.3 (5.1, 9.6) | 6.0 (4.3, 7.6) | 3.3 (0.7, 5.9) | 5.0 (3.1, 6.8) | 3.9 (1.0, 6.9) |
| Fully adjusted | 6.2 (5.1, 7.2) | 4.2 (2.2, 6.1) | 7.6 (6.3, 8.9) | 7.1 (4.9, 9.3) | 6.3 (4.6, 7.9) | 2.6* (−0.4, 5.6) | 4.7 (2.8, 6.6) | 2.9 (−0.1, 6.0) |
*
Pairwise comparisons to referent group (P0): P<0.05;
**
P<0.01;
***
P< 0.001. n=number of women within groups at the end of follow-up.
Minimally adjusted models include height, age, center, and time. Fully adjusted models include relevant baseline characteristics (height, percent of kcal from protein, OC use, gravidity, education level, smoking status, and physical activity score) and time-dependent follow-up characteristics (number of short pregnancies, smoking status, age, education, duration of OC use, and change in physical activity), center, and time.
NR=not reported due to small sample size.