| Total (n = 500) | Mild (n = 380) | Severe (n = 120) | χ2 | P | |||
No. | % | No. | % | No. | % | |||
1) Number of gestation |
|
|
|
|
|
|
|
|
Singleton | 430 | 86.0 | 332 | 87.4 | 98 | 81.7 |
|
|
Multiple | 70 | 14.0 | 48 | 12.6 | 22 | 18.3 | 240.463 | 0.01 |
2) Liquor |
|
|
|
|
|
|
|
|
Ok | 421 | 84.2 | 379 | 99.7 | 42 | 35.0 | 287.295* | <0.001* |
Oligohydramnios | 79 | 15.8 | 1 | 0.3 | 78 | 65.0 |