Table 2. GWG and Prepregnancy BMI Characteristics of the Study Population.
| Characteristic | No. (%) | P valuea | ||
|---|---|---|---|---|
| All (n = 15 145) | Allergic diseases | |||
| No (n = 6268) | Yes (n = 8877) | |||
| Prepregnancy BMI | ||||
| Underweight (<18.5) | 3037 (20.1) | 1250 (19.9) | 1787 (20.1) | .59 |
| Normal (18.5-22.9) | 10 150 (67.0) | 4180 (66.7) | 5970 (67.3) | |
| Overweight (23.0-24.9) | 1323 (8.7) | 569 (9.1) | 754 (8.5) | |
| Obese (≥25.0) | 635 (4.2) | 269 (4.3) | 366 (4.1) | |
| GWG, kg | ||||
| <10.0 | 2651 (17.5) | 1221 (19.5) | 1430 (16.1) | <.001 |
| 10.0-15.0 | 7603 (50.2) | 3204 (51.1) | 4399 (49.6) | |
| 15.0-25.0. | 4064 (26.8) | 1547 (24.7) | 2517 (28.4) | |
| ≥25.0 | 827 (5.5) | 296 (4.7) | 531 (6.0) | |
| GWG relative to IOM recommendationb | ||||
| Below | 4932 (32.6) | 2265 (36.1) | 2667 (30.0) | <.001 |
| Within | 5410 (35.7) | 2182 (34.8) | 3228 (36.4) | |
| Mildly above | 2778 (18.3) | 1081 (17.2) | 1697 (19.1) | |
| Extremely above | 2025 (13.4) | 740 (11.8) | 1285 (14.5) | |
Abbreviations: BMI, body mass index (calculated as weight in kilograms divided by height in meters squared); GWG, gestational weight gain; IOM, Institute of Medicine.
a
A χ2 test was performed on categorical variables to compare children with allergic disease with those without allergic disease.
b
Below IOM indicates below the range recommended by the IOM; within IOM, within the range recommended by the IOM; mildly above IOM, range from the IOM-recommended threshold to the median of the remaining values; and extremely above IOM, range from the median to the maximum.