Table 1 Characteristics of mother-child pairs of the MATEX cohort
Characteristic | Available years* | n (%) or mean (25th–75th percentile) |
|---|---|---|
Mother | ||
Age [years] | 29 (26–33) | |
Pre-pregnancy weight [kg] | 2004–2015 | 67 (57–73) |
Height [cm] | 2004–2015) | 166 (161–170) |
Primiparous | 711,208 (41%) | |
Citizenship | 1990–2015 | |
Other than Finnish | 64,730 (5%) | |
Self-reported smoking | 1990–2015 | |
No | 1,436,322 (84%) | |
Quitted during 1st trimester | 68,344 (4%) | |
Continued during 1st trimester | 198,125(11%) | |
Marital status | ||
Married/registered partnership or cohabiting | 1,112,771 (67%) | |
New-born | ||
Sex (Female) | 853,401 (49%) | |
Gestational age [week + days] | 39 + 5 (39 + 0–40 + 6) | |
Birth weight [kg] | 3.5 (3.2–3.9) | |
Head circumference [cm] | 2004–2015 | 35 (34–36) |
Apgar score at 5 min | 1987–1989, 2004–2015 | |
0–6 | 17,768 (2%) | |
7–8 | 72,137 (10%) | |
9–10 | 666,492 (88%) | |
Stillborn | 6638 (0.4%) | |
Infant mortality (0–364 days of age; excluding stillbirths) | 6410 (0.4%) | |
Number of foetuses | ||
Singletons | 1,696,181 (97%) | |
Multiples | 49,797 (3%) | |
Delivery | ||
Place of birth | 1990–2015 | |
On the way to hospital | 1225 (0.1%) | |
Outside hospital (planned) | 332 (0.02%) | |
Outside hospital (unplanned/no information) | 1126 (0.1%) | |
Mode of delivery | ||
Vaginal | 1,336,572 (77%) | |
Breech, vaginal birth | 10,186 (1%) | |
Vacuum | 110,361 (6%) | |
Planned caesarean section | 110,014 (6%) | |
Urgent/Emergency caesarean section | 174,810 (10%) | |