Table 3 Longitudinal follow-up of included pregnant individuals in the PROMISE Study Population
| Â | Â | Maternal pre-pregnancy BMI classification | |||||
|---|---|---|---|---|---|---|---|
| Â | Total | Underweight | Normal weight | Overweight | Obesity Class I | Obesity Class II | Obesity Class III |
Total number of pregnancies | 77,599 | 1658 | 26,262 | 24,310 | 14,673 | 6536 | 4160 |
Days between last observed weight measure and delivery date [median (10th, 90th %ile)] | 5 (1, 46) | 5 (1, 50) | 5 (1, 43) | 5 (1, 43) | 5 (1, 46) | 6 (1, 53) | 6 (1, 63) |
Pregnancies with last observed weight measure within 2Â weeks of the delivery date (%) | 78.0 | 75.1 | 79.4 | 78.5 | 77.3 | 75.6 | 73.0 |
Number of valid weight measures [median (10th, 90th %ile)] | |||||||
 First trimester | 2 (0, 5) | 2 (0, 4) | 2 (0, 4) | 2 (0, 5) | 2 (0, 5) | 2 (0, 5) | 2 (0, 5) |
 Second trimester | 4 (1, 6) | 3 (1, 5) | 3 (1, 5) | 4 (1, 6) | 4 (1, 6) | 4 (1, 6) | 4 (1, 6) |
 Third trimester | 6 (1, 9) | 5 (1, 9) | 6 (1, 9) | 6 (1, 9) | 6 (1, 9) | 6 (1, 9) | 5 (0, 9) |
Pregnancies with 2 + valid weight measures in each trimester (%) | |||||||
 First trimester | 68.0 | 60.2 | 64.7 | 69.3 | 70.5 | 70.4 | 71.6 |
 Second trimester | 88.2 | 84.3 | 87.4 | 89.1 | 89.0 | 88.1 | 86.8 |
 Third trimester | 88.0 | 85.9 | 88.9 | 88.6 | 88.0 | 86.1 | 82.5 |
Pregnancies with 2 + valid weight measures, at least one week apart, in each trimester (%) | |||||||
 First trimester | 63.9 | 55.9 | 60.3 | 65.3 | 66.5 | 66.7 | 67.6 |
 Second trimester | 87.2 | 82.9 | 86.3 | 88.2 | 88.2 | 87.3 | 85.8 |
 Third trimester | 88.0 | 85.1 | 88.3 | 88.0 | 87.3 | 85.5 | 81.9 |