TABLE 3.
Reasons for ineligibility in analyses and missing data
| Weight variable | Number of participants | Reasons for ineligibility | Number of participants with missing weights at each time point | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Eligible, n (% of total cohort [N=169]) | Analyzed, n (% eligible) | Pregnant at randomizationa | Late pregnancy loss (14–20 wk) | Preterm birth (28–37 wk) | Pregnancy ongoing at end of follow-up | Total | Pregnancyonsetb | End of first trimesterc | End of second trimesterd | ≥37 wke | |
| Prepregnancy weight loss | 157 (92.9) | 156 (99.4) | 12 | — | — | — | 1 | 1 | — | — | — |
| First-trimester GWG | 169 (100.0) | 165 (97.6) | — | — | — | — | 4 | 1 | 3 | — | — |
| Second trimester GWG | 165 (97.6) | 160 (97.0) | — | 4 | — | — | 5f | — | 3 | 3 | — |
| Third trimester GWG | 160 (94.7) | 157 (98.1) | — | 4 | 1 | 4 | 3 | — | — | 3 | — |
| Total GWGg | 149 (88.2) | 141 (94.6) | — | 4 | 12 | 4 | 8 | 1 | — | — | 7 |
GWG, gestational weight gain.
Although participants self-reported not being pregnant at the baseline visit, it was later determined that some were already pregnant;
Self-reported prepregnancy weight or, if not available, weight at first prenatal visit (must have been measured before 11 weeks’ gestation);
Weight had to be measured at 14 weeks’ gestation±20 days;
Weight had to be measured at 28 weeks’ gestation±20 days;
Weight had to be measured at or after 37 weeks’ gestation to be included in the total GWG analysis;
Total does not equal sum of row because 1 person was missing at both end of the first trimester and end of the second trimester weight so only counted once in total;
Participants had to be at full term (≥37 weeks’ gestation) to be included in the total GWG analysis.