Table 1 Maternal characteristics according to NVP status
Total | No NVP | Mild NVP | Moderate NVP | Severe NVP | P value | |
|---|---|---|---|---|---|---|
n = 96,056 | n = 16,596 | n = 41,198 | n = 27,744 | n = 10,518 | ||
n | n (%) | n (%) | n (%) | n (%) | ||
Maternal Age (years) | ||||||
< 20 | 814 | 190 (1.2) | 256 (0.6) | 256 (0.9) | 112 (1.1) | < 0.001 |
20–24 | 8630 | 1678 (10.1) | 3026 (7.4) | 2787 (10.1) | 1139 (10.8) | |
25–29 | 26,528 | 4487 (27.0) | 10,775 (26.2) | 8111 (29.2) | 3155 (30.0) | |
30–34 | 34,075 | 5432 (32.7) | 14,997 (36.4) | 9967 (35.9) | 3679 (35.0) | |
35–39 | 21,622 | 3861 (23.3) | 10,038 (24.4) | 5636 (20.3) | 2087 (19.8) | |
≥ 40 | 4383 | 945 (5.7) | 2106 (5.1) | 986 (3.6) | 346 (3.3) | |
Missinga | 4 | |||||
Parity | ||||||
Nullipara | 37,800 | 8244 (51.4) | 15,404 (38.2) | 10,040 (36.9) | 4112 (40.1) | < 0.001 |
Multipara | 56,005 | 7804 (48.6) | 24,875 (61.8) | 17,170 (63.1) | 6156 (60.0) | |
Missinga | 2251 | |||||
Education (years) | ||||||
≤ 12 | 34,790 | 6398 (38.7) | 14,118 (34.4) | 10,320 (37.3) | 3954 (37.8) | < 0.001 |
> 12 | 60,893 | 10,126 (61.3) | 26,931 (65.6) | 17,315 (62.7) | 6521 (62.3) | |
Missinga | 373 | |||||
BMI (kg/m2) | ||||||
< 18.5 | 15,500 | 2859 (17.2) | 6834 (16.6) | 4167 (15.0) | 1640 (15.6) | < 0.001 |
18.5–24.9 | 70,221 | 12,141 (73.2) | 30,216 (73.4) | 20,351 (73.4) | 7513 (71.5) | |
≥ 25 | 10,272 | 1584 (9.6) | 4122 (10.0) | 3209 (11.6) | 1357 (12.9) | |
Missinga | 63 | |||||
Smoking during pregnancy | ||||||
No | 90,887 | 15,325 (93.3) | 39,155 (95.8) | 26,294 (95.5) | 10,113 (97.0) | < 0.001 |
Yes | 4386 | 1106 (6.7) | 1724 (4.2) | 1239 (4.5) | 317 (3.0) | |
Missinga | 783 | |||||
Pregnancy Complications | ||||||
Threatened abortion | 11,428 | 1695 (10.2) | 4885 (11.9) | 3451 (12.4) | 1397 (13.3) | < 0.001 |
Threatened premature labor | 18,715 | 2896 (17.5) | 7990 (19.4) | 5566 (20.1) | 2263 (21.5) | < 0.001 |
Premature rupture of membrane | 7932 | 1549 (9.3) | 3374 (8.2) | 2218 (8.0) | 791 (7.5) | < 0.001 |
Pregnancy-induced hypertension | 2964 | 622 (3.8) | 1189 (2.9) | 841 (3.0) | 312 (3.0) | < 0.001 |