Table 1 Maternal and neonatal characteristics of the analysed population (including stillbirths)
Maternal characteristics | Maternal characteristics | ||
|---|---|---|---|
Variable | N = 1,274,449 1 | Variable | N = 1,274,4491 |
parity | Â | civil status | Â |
 1 | 626,129 (49%) |  married | 982,708.0 (77.1%) |
 2 | 464,044 (36%) |  single | 291,741.0 (22.9%) |
 3 | 139,646 (11%) | maternal age (years) | 31.4 (5.0) |
 >3 | 39,767 (3.1%) | mean SSEP | 58.2 (8.6) |
 missing | 4,863 (0.4%) |  missing | 205 (<0.1%) |
urbanity | Â | mean altitude | 536.9 (185.5) |
 rural | 646,138 (51%) |  missing | 205 (<0.1%) |
 urban | 628,106 (49%) | Neonatal characteristics | |
 missing | 205 (<0.1%) | birth weight (g) | 3,325.2 (523.2) |
language region | Â | sex | Â |
 German or Romansh | 911,143.0 (71.5%) |  male | 655,640.0 (51.4%) |
 French | 318,553.0 (25.0%) |  female | 618,809.0 (48.6%) |
 Italian | 44,548.0 (3.5%) | gestational age (weeks) | 39.4 (1.8) |
 missing | 205 (<0.1%) | gestational age category |  |
maternal nationality |  |  term | 1,204,114.0 (94.5%) |
 Switzerland | 782,480.0 (61.4%) |  preterm (<37 weeks) | 70,335.0 (5.5%) |
 Europe | 373,904.0 (29.3%) | living status |  |
 Asia | 44,915.0 (3.5%) |  livebirth | 1,269,586.0 (99.6%) |
 Africa | 37,187.0 (2.9%) |  stillbirth | 4,863.0 (0.4%) |
 Southern and Central America | 22,910.0 (1.8%) | birth weight category |  |
 Northern America | 7,474.0 (0.6%) |  normal BW | 1,214,013.0 (95.3%) |
 missing or Oceanian | 5,579.0 (0.4%) |  low birth weight (<2'500g) | 60,436.0 (4.7%) |