Table 1 Maternal characteristics for symptom-free (SF) women, women with nausea alone (NP), and women with nausea and vomiting (NVP) according to the presence of pelvic girdle paina (PGP) during pregnancy, n = 52,678
SF | NP | NVP | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
no PGP (n = 13,045) | PGP (n = 1456) | P value | no PGP (n = 16,908) | PGP (n = 3690) | P value | no PGP (n = 13,953) | PGP (n = 3626) | P value | ||
n | Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | ||||
Maternal age at delivery (years) | 52,678 | 30.3 (4.6) | 30.0 (4.7) | 0.06 | 30.8 (4.5) | 30.7 (4.4) | 0.06 | 29.1 (4.7) | 29.2 (4.7) | 0.60 |
Maternal weight at delivery (kg) | 52,678 | 67.2 (12.1) | 69.9 (13.6) | < 0.001 | 67.3 (11.9) | 69.8 (13.4) | < 0.001 | 67.8 (13.3) | 71.3 (15.1) | < 0.001 |
Body mass index at pregnancy start (kg/m2) | 52,678 | 23.7 (4.0) | 24.8 (4.6) | < 0.001 | 23.7 (3.9) | 24.7 (4.5) | < 0.001 | 24.1 (4.4) | 25.4 (5.1) | < 0.001 |
Age at menarche (years) | 52,025 | 13.1 (1.4) | 12.9 (1.3) | < 0.001 | 13.1 (1.4) | 12.9 (1.4) | < 0.001 | 13.0 (1.4) | 12.8 (1.4) | < 0.001 |
Years from menarche to pregnancy (years) | 26 901b | 16.0 (4.5) | 15.5 (4.4) | 0.008 | 16.2 (4.4) | 15.7 (4.5) | 0.001 | 14.6 (4.4) | 14.2 (4.5) | < 0.03 |
n | n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | ||||
Parity | 52,678 | |||||||||
Primiparous | 27,758 | 8329 (63.8) | 696 (47.8) | < 0.001 | 8203 (48.5) | 1263 (34.2) | < 0.001 | 7741 (55.5) | 1526 (42.1) | < 0.001 |
Maternal education (years) | 52,678 | |||||||||
≤ 12 | 16,045 | 3790 (29.1) | 547 (37.6) | < 0.001 | 4375 (25.9) | 1266 (34.3) | < 0.001 | 4597 (32.9) | 1470 (40.5) | < 0.001 |
Smoking during pregnancy | 52,320 | |||||||||
Daily | 2685 | 823 (6.4) | 157 (10.9) | < 0.001 | 633 (3.8) | 191 (5.2) | < 0.001 | 636 (4.6) | 245 (6.8) | < 0.001 |
Incidences of irritability before menses | 47,565 | |||||||||
Yes | 29,497 | 6479 (52.4) | 775 (58.2) | < 0.001 | 9984 (63.4) | 2350 (70.5) | < 0.001 | 7817 (61.8) | 2092 (66.9) | < 0.001 |
Previous experience of NVP | 21 639c | |||||||||
Yes | 7792 | 347 (8.5) | 85 (14.7) | < 0.001 | 1682 (22.5) | 629 (32.4) | < 0.001 | 3731 (65.4) | 1318 (70.1) | < 0.001 |