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Table 1 Urinary stress incontinence before, during and 3 months after pregnancy in 835 women delivering vaginally without or with a previous vaginal birth, and in 104 primiparous women delivering by Caesarean.*

From: Effects of carrying a pregnancy and of method of delivery on urinary incontinence: a prospective cohort study

  Urinary stress incontinence
  before pregnancy third trimester 3 mo. postpartum
  N % N % N %
1 st vaginal birth (N = 467)       
None 392 83.9 190 41.1 322 68.8
Less than once per week 62 13.3 168 36.4 99 21.2
One to six times per week 6 1.3 72 15.6 34 7.3
Once daily 4 0.9 17 3.7 8 1.7
More than once daily 3 0.6 15 3.3 5 1.1
Repeat vaginal birth (N = 367)       
None 250 68.1 89 24.3 232 63.2
Less than once per week 93 25.3 145 39.5 98 26.7
One to six times per week 14 3.8 78 21.3 24 6.5
Once daily 6 1.6 28 7.6 2 0.5
More than once daily 4 1.1 27 7.4 11 3.0
1 st Caesarean section (N = 104)       
None 87 83.7 46 44.2 92 88.5
Less than once per week 15 14.4 34 32.7 10 9.6
One to six times per week 2 1.9 17 16.4 1 1.0
Once daily 0 0 5 4.8 1 1.0
More than once daily 0 0 2 1.9 0 0
  1. *Totals may vary due to missing data. Ten women with a previous vaginal birth who delivered by Caesarean are not described in this table.