Table 2. Socio-demographic and clinical characteristics at inclusion of the 100 dyads included, of the 62 dyads evaluated 12 months after birth and of the 38 dyads lost to follow-up.
| Infants’ clinical characteristics | Dyadsincludedn = 100 | Dyads evaluatedat 12 monthsn = 62 | Lost to follow-upat 12 monthsn = 38 | |
|---|---|---|---|---|
| Gestational age (m ± sd, weeks) | 29.6 ± 1.7 | 29.7 ± 1.6 | 29.4 ± 1.9 | p = 0.74 |
| Birth weight (m ± sd, grams) | 1319 ± 330 | 1297 ± 344 | 1357 ± 1.6 | p = 0.67 |
| Sex (nb males, %) | 57 (57%) | 34 (54.8%) | 23 (60.5%) | p = 0.33 |
| Apgar score at 5 min (Q2, min-max) | 8 (0–10) | 8 (0–10) | 8 (1–10) | p = 0.93 |
| Apgar score at 10 min (Q2, min-max) | 9 (3–10) | 9 (3–10) | 9 (3–10) | p = 0.98 |
| Need for neonatal resuscitation* (nb, %) | 39 (39%) | 25 (40.3%) | 14 (36.8%) | p = 0.94 |
| PRI score (Q2, min-max) | 4 (0–10) | 4 (0–10) | 4 (1–10) | p = 0.87 |
| Length of hospitalization (m ± sd, weeks) | 7.7 ± 2.4 | 7.8 ± 2.4 | 7.6 ± 2.6 | p = 0.96 |
| Mothers’ socio-demographic and clinical characteristics | ||||
| Age (m ± sd, years) | 29.8 ± 5.9 | 30.4 ± 5.5 | 28.9 ± 6.5 | p = 0.47 |
| In couple (nb, %) | 92 (92%) | 57 (92%) | 35 (92%) | p = 0.99 |
| Graduated from high school (nb, %) | 74 (74%) | 49 (79%) | 25 (66%) | p = 0.47 |
| Higher education (nb, %) | 51 (51%) | 34 (55%) | 15 (39.5%) | p = 0.31 |
| Nb of pregnancies (m ± sd) | 2.1 ± 1.4 | 1.9 ± 1.3 | 2.3 ± 1.6 | p = 0.27 |
| Nb of childbirths (m ± sd) | 1.8 ± 1.1 | 1.7 ± 0.9 | 1.9 ± 1.3 | p = 0.63 |
| In vitro fertilization (nb, %) | 10 (10%) | 6 (9.6%) | 4 (10.5%) | p = 0.99 |
| Multiple pregnancy (nb, %) | 22 (22%) | 14 (24%) | 8 (21%) | p = 0.87 |
| Threatened premature labor (nb, %) | 76 (76%) | 49 (79%) | 27 (71%) | p = 0.66 |
| Caesarean section (nb, %) | 54 (54%) | 39 (63%) | 15 (39.5%) | p = 0.07 |
| HADS anxiety score (Q2, min-max) | 9.5 (1–21) | 9.5 (2–21) | 9.5 (1–20) | p = 0.99 |
| HADS depression score (Q2, min-max) | 6 (0–19) | 7 (0–19) | 5.5 (0–19) | p = 0.99 |
At the inclusion (visit 1), socio-demographic characteristics were gathered and a first assessment was made.
*Neonatal resuscitation included tube placement and/or cardiac compression and/or epinephrine/vasopressive drug requirement.
m: mean, sd: standard deviation, nb: number, Q2: median or second quartile, min: minimal value, max: maximal value.