Table 1.
Participant characteristics by maternal pre-pregnancy body mass index, Collaborative Perinatal Project, 1959-1965 and 1989-1991
| Maternal BMI (kg / m2) | |||
|---|---|---|---|
| < 25 (n=466) No. (%) |
25.0-29.9 (n=94) No. (%) |
≥ 30 (n=37) No. (%) |
|
|
Maternal socioeconomic
index a |
|||
| < 27 (low) | 97 (21) | 24 (26) | 6 (16) |
| 27-39 | 104 (22) | 26 (28) | 8 (22) |
| 40-52 | 135 (29) | 24 (26) | 18 (49) |
| > 52 | 115 (25) | 18 (19) | 4 (11) |
| Missing | 15 (3) | 2 (2) | 1 (3) |
| Maternal parity | |||
| 0 | 131 (28) | 16 (17) | 3 (8) |
| 1-2 | 189 (41) | 32 (34) | 12 (32) |
| > 2 | 145 (31) | 46 (49) | 22 (59) |
| Missing | 1 (<1) | ||
| Maternal age at menarche (years) | |||
| < 12 | 107 (23) | 27 (29) | 14 (38) |
| 12 | 110 (24) | 24 (26) | 10 (27) |
| 13 | 140 (30) | 19 (20) | 6 (16) |
| >13 | 106 (23) | 24 (26) | 7 (19) |
| Missing | 3 (1) | ||
| Daughter race | |||
| Black | 314 (67) | 74 (79) | 31 (84) |
| All others | 152 (33) | 20 (21) | 6 (16) |
|
Daughter BMI-for-age
percentile b |
|||
| < 85th | 343 (74) | 67 (71) | 26 (70) |
| 85th to less than 95th | 26 (6) | 10 (11) | 4 (11) |
| ≥ 95th | 10 (2) | 3 (3) | 5 (14) |
| Missing | 87 (19) | 14 (15) | 2 (5) |
| Daughter SGA status | |||
| SGA | 124 (27) | 21 (22) | 7 (19) |
| Not SGA | 342 (73) | 73 (78) | 30 (81) |
a
Based on the mothers’ socioeconomic status at the time of the first prenatal visit
b
Based on CDC growth charts for BMI at age 7 among girls