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.*

	Urinary stress incontinence
	before pregnancy		third trimester		3 mo. postpartum
	N	%	N	%	N	%
1st 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
1st 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

*Totals may vary due to missing data. Ten women with a previous vaginal birth who delivered by Caesarean are not described in this table.