| Variables | Case | witnesses | OR/IC | p |
| Age |
|
|
|
|
| <20 | 12 (31.6%) | 26 (68.4%) | 0.91 (0.43 to 1.89) | 0.805 |
| 20 - 35 | 57 (31.8) | 122 (68.2) |
|
|
| >35 | 25 (38.5) | 40 (61.5) | 25.3 (12.56 - 50.87) | <0.001 |
| Size of mother |
|
|
| |
| <150 | 4 (36.4) | 7 (63.6) | 1.14 (0.327 to 4.028) | 0.827 |
| ≥150 | 90 (33.2) | 181 (66.8) |
|
|
| Weight |
|
|
|
|
| <60 | 36 (38.3) | 58 (61.7) |
|
|
| ≥60 | 58 (30.8) | 130 (69.2) | 1.39 (0.828 - 2.336) | 0.211 |
| Parity |
|
|
|
|
| Primipare | 47 (38.8) | 74 (61.2) | 1.5 (0.935 - 2.537) | 0.088 |
| 2 - 4 | 20 (30.3) | 46 (69.7) |
|
|
| Over 4 | 27 (28.4) | 68 (71.6) | 0.71 (0.415 - 1.216) | 0.212 |
| gravidity |
|
|
|
|
| Gravida | 22 (44) | 28 (56) | 1.74 (0.935 - 3.258) | 0.077 |
| Paucigestes (2 - 3) | 24 (36.9) | 41 (63.1) |
|
|
| Multigravidae (4 - 5) | 20 (32.3) | 42 (67.7) |
|
|
| Multigravidae large (≥6) | 28 (26.7) | 77 (73.3) | 0.611 (0.360 - 1.038) | 0.067 |
| Previous Caesarean section | ||||
| Yes | 16 (76.2) | 5 (23.8) | 7.5 (2.657 - 21.211) | <0.001 |
| No | 78 (29.9) | 183 (70.1) |
|
|