| Case | Control-cases | P | |||
Average | Extreme | Average | Extreme | |||
Age (year) | 29.70 ± 5.03 | 20 - 40 | 29.44 ± 4.96 | 21 - 40 | 0.900 | |
Parity | 1.64 ± 1.45 | 0 - 5 | 1.59 ± 1.56 | 0 - 6 | 0.900 | |
Gestational age | 39.31 ± 1.07 SA | 37 - 41 | 39.31 ± 1.07 SA | 37- 41 | 1.000 | |
Bishop score | 3.22 | 1 - 6 | - | - | - | |