Table 2.
Pregnancy outcomes within 24 months after the start of the intervention.
| Lifestyle Intervention (SMS+ and SMS−) | Care as Usual | Total | ||
|---|---|---|---|---|
| n (%) | n (%) | p | n (%) | |
| Conception resulting in live birth | 49/123 (39.8) | 23/60 (38.3) | 0.845 | 72/183 (39.3) |
| Stillbirth (ante partum) | - | - | - | 3/75 (4.0) |
| Mode of conception | ||||
| Spontaneous | 27/49 (55.1) | 15/23 (65.2) | 42/72 (58.3) | |
| After ART | 16/49 (32.7) | 7/23 (30.4) | 23/72 (31.9) | |
| Unknown | 6/49 (12.2) | 1/23 (4.3) | 0.521 | 7/72 (9.7) |
| Method of delivery | ||||
| Vaginal birth | 25/49 (51.0) | 11/23 (47.8) | 36/72 (50.0) | |
| Instrument-assisted/caesarean section | 22/49 (44.9) | 12/23 (52.2) | 34/72 (47.2) | |
| Unknown | 2/49 (4.1) | 0/23 (0.0) | 0.564 | 2/72 (2.8) |
| Pregnancy complications | ||||
| (gestational) diabetes | 4/49 (8.2) | 5/23 (21.7) | 0.133 | 9/72 (12.5) |
| Hypertensive disorders | 4/49 (8.2) | 3/23 (13.0) | 0.673 | 7/72 (9.7) |
| Preterm birth | 6/49 (12.2) | 4/23 (17.4) | 0.716 | 10/72 (13.9) |
| Adverse postpartum outcomes | ||||
| Hemorrhage | - | - | - | 5/72 (6.9) |
| Adverse neonatal outcomes | ||||
| Apgar score < 7 after 5 min | - | - | - | 3/72 (4.2) |
| NICU admission | 3/49 (6.1) | 3/23 (13.0) | 0.376 | 6/72 (8.3) |
| Small for gestational age | 6/49 (12.2) | 4/23 (17.4) | 0.716 | 10/72 (13.9) |
| Large for gestational age | 5/49 (10.6) | 4/23 (17.4) | 0.452 | 9/72 (12.5) |
| Congenital abnormalities | - | - | - | 5/72 (6.9) |
| Median (IQR) | Median (IQR) | |||
| Birth weight (grams) | 3350 (2915–3760) | 3260 (2790–3870) | 0.668 | |
| Birth weight (percentile) | 64 (24–83) | 69 (22–86) | 0.817 | |
| Gestational age at delivery (days) | 276 (264–283) | 276 (267–283) | 0.633 | |
| Apgar 5 min | 10 (9–10) | 10 (9–10) | 0.734 |
Note: Results are based on calculations by the Erasmus MC using non-public microdata from Statistics Netherlands. Values are displayed as number/total (percentage) or as medians (interquartile range). Differences were tested with the use of the X2 test or the Fishers exact test for categorical outcomes and with the use of the Mann–Whitney U test for continuous outcomes. There were no significant differences between the groups. Abbreviations: SMS+; lifestyle intervention with SMS support, SMS−; lifestyle intervention without SMS support, ART; assisted reproductive technology, NICU; neonatal intensive care unit, IQR = Interquartile range.