Table 1. Demographic data of the parents and their infants.
| Female | Male | Total | |
|---|---|---|---|
| Parents’ characteristics | 18 (50%) | 18 (50%) | 36 (100%) |
| Mean age in years (±SD) | 34 (±7) | 38 (±6) | 36 (±7) |
| Educational levela Primary education | 1 (6%) | 3 (17%) | 4 (11%) |
| Lower secondary education | 4 (22%) | 5 (28%) | 9 (24%) |
| Upper secondary education | 4 (22%) | 2 (11%) | 6 (16%) |
| Post-secondary non-tertiary education | 1 (6%) | 3 (17%) | 4 (11%) |
| Short-cycle tertiary education | 3 (17%) | 2 (11%) | 5 (14%) |
| Bachelor’s or equivalent level | 5 (28%) | 1 (5%) | 6 (17%) |
| Master’s or equivalent level | 0 — | 2 (11%) | 2 (6%) |
| Employment statusb Student | 2 (11%) | 1 (6%) | 3 (8%) |
| Parental leave | 18 (100%) | 0 — | 18 (50%) |
| Self-employed | 2 (11%) | 1 (6%) | 3 (8%) |
| Employed | 1 (6%) | 15 (83%) | 15 (41%) |
| Independent contractor | 1 (6%) | 1 (6%) | 2 (6%) |
| unemployed | 0 — | 1 (6%) | 1(3%) |
| Professional groupsc | |||
| Legislators, senior-officials and managers | 3 (17%) | 6 (33%) | 9 (25%) |
| Professionals | 6 (33%) | 2 (11%) | 8 (22%) |
| Technicians and associate professionals | 0 — | 5 (28%) | 5 (14%) |
| Clerks | 4 (22%) | 0 — | 4 (11%) |
| Service workers and shop and market sales workers |
4 (22%) | 5 (28%) | 9 (25%) |
| Elementary occupations | 1 (6%) | 0 — | 1 (3%) |
| Multiple birth | 6 (33%) | 5 (28%) | 11 (31%) |
| First time parents | 12 (67%) | 13 (72%) | 25 (69%) |
| Children’s’ characteristics | 13 (37%) | 22 (63%) | 35 (100%) |
| Mean hospital stay in days (±SD, range) | 214 (±71, 81–352) | ||
| Mean APGAR 5 (±SD, range) | 9 (±1, 4–9) | ||
| Mean gestational age (±SD, range) | 27+2 (±3, 23+4–33+5) | ||
| Mean birthweight in gram (±SD, range) | 1013 (±278, 550–1500) | ||
| Preterm birth complications | BPD/CLD 5 (15%) | NEC 3(9%) | IVH IV 1(3%) |
| ROP I 1 (3%) | ROP II 5 (14%) | ROP III 1(3%) | |
a = Levels of the International Standard Classification of Education,
b = Major groups of the International Classification of Occupations,
c = Multiple answers allowed, BPD/CLD = Bronchopulmonary dysplasia or chronical lung disease, IVH = intraventricular hemorrhage, NEC = necrotizing enterocolitis, ROP = retinopathy of prematurity, SD = Standard deviation.