Table 1:
Characteristics of 453 vaginally parous women, by levator ani avulsion.
| Characteristica | No levator ani avulsion (n=387) |
Levator ani avulsion (n=66) |
P value |
|---|---|---|---|
| Age at ultrasound, years | 42.9 [39.5, 47.2] | 45.9 [42.4, 48.9] | <.001 |
| Age at first vaginal birth | 31.2 [28.6, 35.0] | 34.8 [31.2, 36.9] | <.001 |
| Years from first vaginal birth to ultrasound visit | 11.1 [9.3, 13.7] | 11.2 [9.4, 13.4] | 0.973 |
| Black race (vs. nonblack) | 12% (47) | 5% (3) | 0.069 |
| Multiparous at ultrasound | 79% (305) | 73% (48) | 0.271 |
| Vaginal births prior to ultrasound > 1 | 65% (251) | 67% (44) | 0.776 |
| BMI ≥ 30kg/m2 at ultrasound | 24% (91) | 17% (11) | 0.218 |
| Anyb vaginal delivery with macrosomia (> 4 kg) | 13% (51) | 26% (17) | 0.008 |
| Anyb vaginal delivery with second stage > 2 hours | 24% (94) | 55% (36) | <.001 |
| Anyb episiotomy | 53% (204) | 62% (41) | 0.156 |
| Anyb obstetric anal sphincter laceration | 14% (56) | 30% (20) | 0.002 |
| Anyb vacuum-assisted vaginal delivery | 12% (45/387) | 11% (7/66) | 0.810 |
| Anyb forceps-assisted vaginal delivery | 8% (32) | 45% (30) | <.001 |
Abbreviations: BMI=body mass index
a
Categorical variables reported as percent (n); continuous variables reported as median [interquartile range].
b
“Any” refers to an occurrence across all deliveries.