Table 3.

Odds ratios (95% confidence intervals) obtained from GEE analysis for urge incontinence by each measure of BMI across the adult life

BMI (kg/m2)	Age adjusted	p-value*
Body mass index at 20		0.6
BMI < 20	0.88 (0.68 – 1.15)
20 ≤ BMI <25	Reference
25 ≤ BMI < 30	1.07 (0.73- 1.56)
BMI ≥ 30	1.40 (0.68 – 2.87)
BMI (per unit kg/m2)	1.03 (0.99 - 1.07)	0.07
Body mass index at 26		0.3
BMI < 20	1.05 (0.80 – 1.39)
20 ≤ BMI <25	Reference
25 ≤ BMI < 30	1.25 (0.92 – 1.72)
BMI ≥ 30	1.64 (0.89 – 3.00)
BMI (per unit kg/m2)	1.03 (1.00 - 1.06)	0.05
Body mass index at 36		0.05
BMI < 20	1.01 (0.72 – 1.42)
20 ≤ BMI <25	Reference
25 ≤ BMI < 30	1.37 (1.04 – 1.75)
BMI ≥ 30	1.61 (1.08 – 2.40)
BMI (per unit kg/m2)	1.04 (1.01-1.07)	0.003
Body mass index at 43		0.02
BMI < 20	1.20 (0.78 – 1.86)
20 ≤ BMI <25	Reference
25 ≤ BMI < 30	1.14 (0.89 – 1.48)
BMI ≥ 30	1.69 (1.25 – 2.27)
BMI (per unit kg/m2)	1.04 (1.02 - 1.06)	0.0004
BMI transition between 20 to 43 years		0.1
Always underweight/normal weight	Reference
Lost weight†	1.63 (0.75 – 3.55)
Gained weight‡	1.33 (1.04 – 1.70)
Always overweight/obese	1.22 (0.82 – 1.81)
Age at onset of overweight/obesity		0.2
Always underweight/normal weight	Reference
Age 20	1.26 (0.89 – 1.80)
Age 26	1.46 (1.01 – 2.11)
Age 36	1.38 (1.00 – 1.91)
Age 43	1.12 (0.81 – 1.53)

^*p-value corresponds to the test for heterogeneity across the categories;

^†decreasing at least one BMI category;

^‡increasing at least one BMI category