Table 3.
Primary composite criterion and analysis of its separate elements
| Disposable cup group (n = 295) | Metallic cup group (n = 283) | p-value | |
|---|---|---|---|
| Primary composite criteriona | 225 (76.3 %) | 196 (69.3 %) | 0.06 |
| Failed delivery with allocated vacuum deviceb | 105 (35.6 %) | 20 (7.1 %) | 0.0001 |
| Forceps whatever the number of detachments | 29 (9.8 %) | 14 (5.0 %) | 0.03 |
| Caesarean section whatever the number of detachments | 13 (4.4 %) | 3 (1.1 %) | 0.01 |
| Other type of vacuum cup whatever the number of detachments | 71 (24.1 %) | 3 (1.1 %) | <0.01 |
| 3 detachmentsc | 9 (3.1 %) | 1 (0.4 %) | 0.02 |
| Neonatal outcomes | |||
| Caput succedaneum | 62 (21.0 %) | 63 (22.3 %) | NS |
| Cephalohaematoma | 5 (1.7 %) | 4 (1.4 %) | NS |
| Maternal outcomes | |||
| Episiotomy | 116 (39.3 %) | 108 (38.1 %) | NS |
| No perineal tears | 22 (7.5 %) | 7 (2.5 %) | <0.01 |
| First degree perineal tear(s) only | 103 (34.9 %) | 101 (35.7 %) | NS |
| Second degree perineal tear(s) only | 50 (17.0 %) | 58 (20.5 %) | NS |
| Third degree/fourth degree perineal tearsd | 5 (1.7 %) | 14 (5.0 %) | <0.01 |
aAt least one event
bNine mothers had at least two attempted modes of delivery (2 F + CS, 1 F+ other cup and 6 CS+ other cup)
cEutocic delivery after 3 detachments
dPerineal tears potentially associated with episiotomy (six mothers: 1 in the disposable cup group and 5 in the metallic cup group)