Table 1 Distribution of matching characteristics by birthplace
Characteristics | FMU (n = 839) | OU (n = 839) | ||
|---|---|---|---|---|
N | (%) | N | (%) | |
Risk status | ||||
 Low obstetric risk | 839 | (100) | 839 | (100) |
Parity | ||||
 Primiparous women | 215 | (25.6) | 215 | (25.6) |
 Multiparous women | 624 | (74.4) | 624 | (74.4) |
Smoking status | ||||
 Non-smokers | 684 | (81.5) | 684 | (81.5) |
 Smokers | 155 | (18.5) | 155 | (18.5) |
Ethnicity | ||||
 Nordic or Western European | 805 | (96) | 809 | (96.4) |
 Other ethnicity | 34 | (4.0) | 30 | (3.6) |
Cohabitation status | ||||
 Living with partner | 815 | (97.1) | 819 | (97.6) |
 Living alone | 24 | (2.9) | 20 | (2.4) |
Education level | ||||
 No postsecondary education | 230 | (27.4) | 230 | (27.4) |
 Postsecondary education | 609 | (72.6) | 609 | (72.6) |
Occupation level | ||||
 Low level of employmenta | 535 | (63.8) | 535 | (63.8) |
 High level of employment | 304 | (36.2) | 304 | (36.2) |
| Â | Mean (SD) | Mean (SD) | ||
Body Mass Index (BMI)b | 24.2 | (3.9) | 24.0 | (3.9) |
Ageb | 29.4 | (4.6) | 30.2 | (4.5) |