Table 4.
Rate of severe trauma pre- and post-intervention for full-term normal births in all women, nulliparous women, and those with and without episiotomy.a
| Item | Pre-intervention | Post-intervention | RD (95% CI) | P value b |
|---|---|---|---|---|
| With and without episiotomy | 213 (3.9) | 96 (1.9) | –2.0(–2.7 to –1.4) | < 0.01 |
| All women | n = 5433 | n = 5034 | ||
| With and without episiotomy | 163 (6.7) | 71 (3.0) | –3.7(–4.9 to –2.5) | < 0.01 |
| Nulliparous | n = 2418 | n = 2337 | ||
| Without episiotomy | 27 (1.4) | 5 (0.2) | –1.1(–1.7 to –0.6) | < 0.01 |
| All women | n = 1972 | n = 2043 | ||
| With episiotomy | 186 (5.4) | 91 (3.0) | –2.3(–3.3 to –1.4) | < 0.01 |
| All women | n = 3461 | n = 2991 |
a
Values given as number (percentage) unless otherwise indicated.
b
Proportion Z test for 2 independent samples.