Table 1.
Prevalence of hyperemesis gravidarum (HG) with 95% confidence intervals (95% CI) according to background characteristics (N = 71,468)
| n (%) | HG (%) (95% CI) | |
|---|---|---|
|
Maternal age |
|
|
| < 20 years |
816 (1.1) |
2.8 (2.7-2.9) |
| 20-24 years |
7674 (10.7) |
1.9 (1.8-2.0) |
| 25-29 years |
25267 (35.3) |
1.1 (1.1-1.2) |
| 30-34 years |
27064 (37.9) |
0.9 (0.9-1.0) |
| ≥ 35 years |
10647 (14.9) |
1.0 (0.9-1.0) |
|
Parity |
|
|
| Primipara |
33408 (46.8) |
1.1 (1.0-1.1) |
| Multipara |
38060 (53.2) |
1.2 (1.1-1.3) |
|
Body mass index |
|
|
| < 18.5 (kg/m2) |
1325 (1.9) |
2.0 (1.9-2.1) |
| 18.5-24.9 (kg/m2) |
47390 (66.3) |
1.0 (0.9-1.1) |
| 25.0-29.9(kg/m2) |
15727 (22.0) |
1.4 (1.3-1.5) |
| ≥ 30.0 (kg/m2) |
7026 (9.8) |
1.5 (1.4-1.6) |
|
Education |
|
|
| < 12 years |
14168 (19.8) |
1.6 (1.5-1.7) |
| 12 years |
10438 (14.6) |
1.4 (1.3-1.4) |
| 13-16 years |
29569 (41.4) |
1.1 (1.0-1.1) |
| ≥ 17 years |
17293 (24.2) |
0.8 (0.7-0.9) |
|
Smoking habit |
|
|
| Non-smokers |
65362 (91.5) |
1.2 (1.1-1.3) |
| Smokers |
6106 (8.5) |
0.6 (0.5-0.7) |
|
Weight gain during pregnancy |
|
|
| < 0 kg |
565 (0.8) |
5.9 (5.7-6.0) |
| 0 - 6.9 kg |
3708 (5.2) |
2.3 (2.2-2.5) |
| 7.0 - 14.9 kg |
26360 (36.9) |
1.1 (1.1-1.2) |
| 15.0 - 19.9 kg |
15239 (21.3) |
0.7 (0.7-0.8) |
| ≥ 20 kg |
8126 (11.4) |
1.1 (1.0-1.1) |
| Missing | 17470 (24.4) | 1.1 (1.0-1.2) |