| OR | 95.0 % CI for OR | |
---|---|---|---|
 |  | Lower | Upper |
Age | 1.1 | 1.1 | 1.2 |
Prenatal examination (reference: normal) | 2.0 | 1.4 | 2.4 |
Doctors’ suggestion (reference: no suggestion) |  | ||
 Suggest CS | 0.8 | 0.5 | 1.2 |
 Suggest VB | 5.2 | 2.7 | 10.0 |
 No option clearly expressed | 0.8 | 0.5 | 1.6 |
 Constant | 0.01 |  |  |