Table 1. Maternal characteristics in the eligible OLIMPE study population, the included population and the included population still participating at 6 months corrected age.
| Eligible | Included | Included and followed-up at 6 months corrected age | |
|---|---|---|---|
| (N = 332) | (N = 174) | (n = 148) | |
| Social characteristics | |||
| Age (years) | 29.9 (5.8) | 30.5 (5.6)* | 30.7 (5.6) |
| Born in France | 84.6 (80.1–88.2) | 85.3 (79.0–89.9) | 85.8 (79.0–90.7) |
| Social security1 | 91.0 (87.2–93.7) | 91.0 (85.6–94.5) | 92.3 (86.5–95.7) |
| Living in a couple | 90.8 (87.0–93.6) | 91.4 (85.9–94.9) | 91.5 (85.5–95.1) |
| Unemployment2 | 5.5 (3.3–9.0) | 4.1 (1.8–8.8) | 3.9 (1.6–9.0) |
| Maternal treatment | |||
| Chronic disease | 29.3 (24.5–34.5) | 26.7 (20.6–33.9) | 27.0 (20.4–34.9) |
| Antidepressant antecedents | 1.8 (0.8–4.0) | 1.2 (0.3–4.7) | 0.7 (0.1–4.9) |
| Infertility treatment | 10.5 (7.5–14.4) | 12.2 (8.1–18.1) | 12.1 (7.7–18.5) |
| Pregnancy | |||
| Primiparity | 37.2 (32.1–42.6) | 39.3 (32.3–46.8) | 39.0 (31.4–47.2) |
| Adequate follow-up | 92.6 (89.1–95.1) | 93.5 (88.5–96.4) | 93.8 (88.4–96.8) |
| Hospitalization | 28.6 (23.9–33.9) | 23.6 (17.8–30.5)* | 24.2 (17.9–31.9) |
| In-utero transfer | 50.0 (44.6–55.4) | 41.4 (34.2–48.9)*** | 41.6 (33.9–49.8) |
| Complication | |||
| PROM3 ± IUI4 | 22.2 (18.0–27.1) | 22.0 (16.4–29.0) | 22.9 (16.7–30.5) |
| Preclampsia | 9.3 (6.5–13.1) | 9.3 (5.7–14.8) | 10.1 (6.0–16.4) |
| PL5 | 68.5 (63.1–73.4) | 68.7 (61.2–75.3) | 67.0 (58.8–74.3) |
| Delivery | |||
| Spontaneous preterm delivery | 41.4 (36.1–46.8) | 43.3 (36.0–50.9) | 43.2 (35.3–51.5) |
| Mode of delivery | |||
| Vaginal | 27.4 (22.8–32.4) | 26.0 (19.9–33.0) | 25.8 (19.3–33.5) |
| Instrumental | 3.6 (2.1–6.3) | 3.5 (1.5–7.5) | 4.0 (1.8–8.8) |
| Caesarean section | 69.0 (63.8–73.8) | 70.6 (63.3–76.9) | 70.2 (62.3–77.1) |
| Anaesthesia | |||
| Regional | 65.4 (60.1–70.4) | 69.3 (62.0–75.7) | 67.5 (59.5–74.7) |
| General | 19.2 (15.3–23.9) | 18.2 (13.1–24.7) | 19.6 (13.9–27.0) |
| Absence | 15.4 (11.8–19.7) | 12.5 (8.4–18.4) | 12.8 (8.3–19.3) |
| Mental health at discharge | |||
| Depressive symptoms (CES-D)6 | ** | † | |
| Not at risk (score <16) | 54.5 (48.3–60.6) | 61.5 (53.5–68.9) | 65.0 (56.4–72.7) |
| Possible (score 16–22) | 19.3 (14.9–24.7) | 18.6 (13.2–25.6) | 18.0 (12.3–25.6) |
| Probable (score ≥23) | 26.2 (21.1–32.0) | 19.9 (14.3–27.0) | 17.0 (11.5–24.4) |
| STAI7-State >40 | 26.3 (21.2–32.1) | 25.1 (18.8–32.6) | 22.1 (15.8–30.0)† |
| STAI8-Trait >40 | 38.1 (32.3–44.2) | 32.7 (25.7–40.4)* | 27.5 (20.5–35.7)††† |
Data are weighted to take into account the different inclusion periods.
Data are means (standard deviation) or % (95% CI).
1Usually national insurance;
2Unemployment is for mother and father;
3PROM: premature rupture of membranes;
4IUI: intrauterine infection;
5PL: other causes of preterm labour;
6CES-D: Center for Epidemiologic Studies Depression Scale;
7STAI: State-Trait Anxiety Inventory for adults, STAI-State: respondent feelings "right now";
8STAI-Trait: respondent feelings "generally".
*p<0.05,
**p<0.01,
***p≤0.001 included vs non-included.
†p<0.05,
†††p≤0.001 included and followed up at 6 months vs included but not followed up at 6 months corrected age.