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
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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) |
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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).