TABLE 3.
Odds ratios and 95% confidence intervals for the association of gestational weight gain with term small and large for gestational age among singleton births to New York City Residents delivering in New York State, 1995 to 2003, n = 31,501
| Gestational weight gain | ||||||||
|---|---|---|---|---|---|---|---|---|
| Cases (n) | 0–9 kg | Cases (n) | 10–14 kg | Cases (n) | 15–19 kg | Cases (n) | 20+ kg | |
| Term small-for-gestational age | ||||||||
| Overall, unadjusted | 742 | 1.3 (1.1–1.4) | 1,123 | 1.0 | 584 | 0.7 (0.7–0.8) | 238 | 0.5 (0.4–0.6) |
| By BMI* (GWG * BMI p = .37) | ||||||||
| Underweight | 41 | 1.5 (1.0–2.3) | 112 | 1.0 | 60 | 0.7 (0.5–1.0) | 15 | 0.3 (0.2–0.6) |
| Normal weight | 388 | 1.5 (1.3–1.7) | 762 | 1.0 | 407 | 0.7 (0.6–0.8) | 151 | 0.5 (0.4–0.6) |
| Overweight | 171 | 1.3 (1.1–1.7) | 184 | 1.0 | 84 | 0.6 (0.5–0.8) | 51 | 0.6 (0.4–0.8) |
| Obese | 142 | 1.8 (1.3–2.4) | 65 | 1.0 | 33 | 0.9 (0.6–1.4) | 21 | 0.9 (0.5–1.4) |
| Term large-for-gestational age | ||||||||
| Overall, unadjusted | 458 | 0.9 (0.8–1.0) | 979 | 1.0 | 925 | 1.4 (1.3–1.5) | 859 | 2.5 (2.3–2.7) |
| By BMI* (GWG * BMI p = .01) | ||||||||
| Underweight | 2 | 0.4 (0.1–1.8) | 16 | 1.0 | 17 | 1.6 (0.8–3.2) | 25 | 5.1 (2.7–9.7) |
| Normal weight | 113 | 0.7 (0.6–0.9) | 451 | 1.0 | 489 | 1.5 (1.3–1.7) | 458 | 2.9 (2.5–3.3) |
| Overweight | 125 | 0.6 (0.5–0.7) | 293 | 1.0 | 251 | 1.3 (1.1–1.6) | 243 | 2.2 (1.8–2.7) |
| Obese | 218 | 0.7 (0.6–0.9) | 219 | 1.0 | 168 | 1.5 (1.2–1.9) | 133 | 1.9 (1.5–2.5) |
BMI = body mass index; GWG = gestational weight gain.
*
Adjusted for BMI, race/ethnicity, maternal age, parity, education, tobacco use.