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. Author manuscript; available in PMC: 2016 Oct 19.
Published in final edited form as: Neurourol Urodyn. 2013 Oct 16;181:259–266. doi: 10.1002/nau.22498

Table III. Risk factors for UI prevalence 12 years after first delivery, incidence, remission, and persistence of UI between 4 and 12 years after first delivery.

Variables included in each multivariate model were those associated with p <0.20 during bivariate analysis (BMI at baseline, delta BMI during follow-up, UI during first pregnancy, first child’s weight) and those originally planned (maternity, age, mode of delivery). Non significant variables (p>0.20) during bivariate analysis (menopausal status, high scool diploma, regular physical exercise, smoking) were not included.

Group A) women who were continent at baseline and follow-up; B) women continent at baseline who became incontinent at follow-up; C) women incontinent at baseline who became continent at follow-up; and D) women incontinent at baseline and follow-up.

Risk factors for UI prevalence 12 years after 1st delivery, incidence, remission, and persistence of UI between 4 and 12 years after 1st delivery
Model 1:
UI prevalence at follow-up
UI vs. no UI
(B+D vs. A+C)
Model 2:
Incidence of UI at follow-up in women continent at baseline
(B vs. A)
Model 3:
UI remission at follow-up in women incontinent at baseline
(C vs. D)
Model 4:
Onset of UI in women incontinent at follow-up early vs. later
(D vs. B)

Risk factors adjusted OR [95% CI]
Age at 1st delivery (years) 0.97 [0.89–1.05] 0.86 [0.75–0.98] 0.96 [0.82–1.13] 1.26 [1.05–1.50]
UI* during 1st pregnancy No 1 1 1 1
Yes 3.77 [1.83–7.76] 1.72 [0.54–4.49] 0.11 [0.02–0.63] 7.33 [2.06–26.04]
BMI at baseline (kg/m2) 1.17 [1.04–1.32] 1.24 [1.05–1.45] 0.97 [0.76–1.25] 0.88 [0.74–1.06]
Delta BMI during follow up‡‡ 1.43 [1.19–1.73] 1.17 [0.93–1.47] 0.37 [0.20–0.68] 1.46 [1.03–2.08]
First child’s weight (/100g) 1.08 [1.001–1.16] 0.99 [0.89–1.10] 0.73 [0.59–0.91] 1.24 [1.03–1.48]
Parity at baseline 1 1 1 1 1
2+ 1.03 [0.54–1.98] 1.63 [0.62–4.25] 0.95 [0.25–3.55] 0.75 [0.21–2.65]
Additional parity during follow up†† No 1 1 1 1
Yes 1.03 [0.51–2.07] 1.01 [0.40–2.52] 0.33 [0.07–1.51] 1.10 [0.31–3.93]
Mode of 1st delivery Vaginal 1 1 1 1
Caesarean 0.51 [0.14–1.90] 0.78 [0.15–4.19] 0.34 [0.01–11.69] 0.15 [0.02–1.45]
*

UI: Urinary incontinence.

BMI at baseline: Body Mass Index in 2000 (four years after first delivery).

‡‡

Delta BMI during follow-up: variation of Body Mass Index between 2000 and 2008 (between four and twelve years after first delivery).

Parity at baseline: parity four years after first delivery.

††

Additional parity during follow-up: number of subsequent pregnancies between 2000 and 2008 (between four and twelve years after first delivery).