Table 1

Prevalence of perineal trauma in women with a singleton vaginal birth
Hospital FMU Homebirth
Nullip = 1,151 Nullip = 109 Nullip = 42
Multip = 1,204 Multip = 179 Multip = 69
Number with outcome Number with outcome Number with outcome
n % 95% CI n % 95% CI n % 95% CI
Intact perineum
Nullip 100 8.6 7.1, 10.3 19 17.4 10.3, 24.6 6 14.3 3.6, 25.0
Multip 343 28.5 26.0, 31.0 71 39.7 32.5, 46.9 39 56.5 44.7, 68.3
Labial tear
Nullip 219 19.0 16.8, 21.3 27 24.8 16.6, 33.0 12 28.6 14.7, 42.4
Multip 148 12.3 10.4, 14.2 30 16.8 11.3, 22.2 5 7.2 1.1, 13.4
Tear of vaginal wall only
Nullip 62 5.4 4.1, 6.7 8 7.3 2.4, 12.3 2 4.8 0.0, 11.3
Multip* 48 4.0 2.9, 5.1 11 6.2 2.7, 9.7 1 1.5 0.0, 4.3
First degree
Nullip 63 5.5 4.2, 6.8 18 16.5 9.5, 23.6 7 16.7 5.3, 28.1
Multip 147 12.2 10.4, 14.1 33 18.4 12.7, 24.0 11 15.9 7.2, 24.7
Second degree
Nullip 404 35.1 32.3, 37.9 38 34.8 25.9, 43.9 12 29.0 14.7, 42.4
Multip 461 38.3 35.5, 41.0 44 24.6 18.3, 31.0 14 20.3 10.7, 29.9
Third degree (a, b, c)
Nullip 69 6.0 4.7, 7.5 2 1.8 0, 4.4 3 7.1 0, 15.0
Multip 29 2.4 1.6, 3.4 1 0.6 0, 1.7 0 0 na
Fourth degree
Nullip 4 0.3 0.0, 0.7 0 0 na 0 0 Na
Multip 2 0.2 0.0, 0.4 0 0 na 0 0 na
Episiotomy
Nullip 364 31.6 30.0, 34.3 7 6.4 1.7, 11.5 1 2.4 0.0, 7.1
Multip 84 7.0 5.5, 8.4 0 0 na 0 0 na
Episiotomy plus 3rdor 4thdegree tear
Nullip 34 0.4 0.1, 0.9 0 0 na 0 0 na
Multip 5 0.0 2.0, 4.1 0 0 na 0 0 na
Extensive tear (any 3rdor 4thdegree tear with/without episiotomy)
Nullip 81 7.0 5.6, 8.5 2 1.8 0, 4.4 3 7.1 0, 15.0
Multip 32 2.7 1.7, 3.6 1 0.6 0, 1.7 0 0 na

Footnotes: * n = 1,203 patients analysed for hospital, and n = 178 for FMU.

Smith et al.

Smith et al. BMC Pregnancy and Childbirth 2013 13:59   doi:10.1186/1471-2393-13-59

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