Table 1 Background-, pregnancy- and labour characteristics of the study population
Characteristics, n = 2953 | mean [SD] or n (%) |
|---|---|
Age, years | 31.1 [4.4] |
 ≤ 19 | 12 (0.4) |
 20 − 34 | 2258 (76.5) |
 ≥ 35 | 647 (21.9) |
 Missing | 36 (1.2) |
Swedish-born | |
 No | 453 (15.3) |
 Yes | 2202 (74.6) |
 Missing | 298 (10.1) |
Country of birth by income levela | |
 High | 2367 (80.2) |
 Upper middle | 142 (4.8) |
 Lower middle | 55 (1.9) |
 Low | 91 (3.1) |
 Missing | 298 (10.1) |
Education, years | |
 > 12 | 1765 (59.8) |
 10–12 | 1040 (35.2) |
 ≤ 9 | 98 (3.3) |
 Missing | 50 (1.7) |
Civil status | |
 Cohabitant | 2770 (93.8) |
 Single mother | 46 (1.6) |
 Other situationb | 55 (1.9) |
 Missing | 82 (2.8) |
BMI at first antenatal visit, kg/m2 | 25.5 [5.0] |
 < 18.5 | 45 (1.5) |
 18.5 − 24 | 1374 (46.5) |
 25 − 29 | 736 (24.9) |
 ≥ 30 | 423 (14.3) |
 Missing | 375 (12.7) |
Pre-pregnancy self-rated health | |
 Good | 2308 (78.2) |
 Poor | 245 (8.3) |
 Missing | 400 (13.5) |
Parity | |
 Primiparous | 1421 (48.1) |
 Parous | 1514 (51.3) |
 Missing | 18 (0.6) |
Previous CSc | |
 No | 2530 (85.7) |
 Yes | 176 (6.0) |
 Missing | 247 (8.4) |
Counselling for fear of childbirth | |
 No | 2590 (87.7) |
 Yes | 313 (10.6) |
 Missing | 50 (1.7) |
Induction of labour | |
 No | 1937 (65.6) |
 Yes | 893 (30.2) |
 Missing | 123 (4.2) |
Gestational week at birth | 39.4 [1.7] |
 Missing | 30 (1.0) |
Multifetal birth (twins) | |
 No | 2845 (96.3) |
 Yes | 31 (1.0) |
 Missing | 77 (2.6) |
Mode of birth | |
 Spontaneous vaginal | 2467 (83.5) |
 Vacuum extraction | 193 (6.5) |
 Unplanned CS | 260 (8.8) |
 Immediate CS | 19 (0.6) |
 Missing | 14 (0.5) |