| n | Correlation ratio | p-value† |
Age | 215 | 0.037 | 0.592 |
Gravida | 215 | −0.081 | 0.240 |
Parity | 215 | −0.059 | 0.386 |
Body weight | 215 | 0.003 | 0.960 |
Gestation week | 215 | 0.069 | 0.316 |