Table 3.

Adjusted Percent Change in Weekly Urinary Incontinence Episode Frequency and Urine Loss According to Magnitude of Weight Loss^*

	Weight Gain†	0% to Less Than 5% Weight Loss		5% to Less Than 10% Weight Loss		More Than 10% Weight Loss
	Percent Change UI (95% CI)	Percent Change UI (95% CI)	P‡	Percent Change UI (95% CI)	P‡	Percent Change UI (95% CI)	P‡	P§
Total incontinence episodes per wk from voiding diary
6 mo	−11 (−29, 12)	−28 (−45, −7)	.11	−53 (−65, −38)	≤.001	−52 (−64, −37)	<.001	<.001
12 mo	−31 (−48, −10)	−46 (−62, −25)	.16	−63 (−75, −46)	.002	−64 (−73, −52)	<.001	<.001
18 mo	−40 (−52, −25)	−50 (−62, −33)	.27	−63 (−74, −47)	.02	−66 (−75, −55)	<.001	<.001
Stress incontinence episodes per wk from voiding diary
6 mo	−42 (−59, −17)	−48 (−65, −24)	.60	−68 (−80, −49)	.003	−74 (−82, −62)	<.001	<.001
12 mo	−51 (−65, −29)	−63 (−79, −37)	.28	−74 (−84, −59)	.02	−74 (−83, −59)	.02	.009
18 mo	−50 (−65, −29)	−63 (−77, −39)	.28	−70 (−83, −49)	.05	−77 (−86, −61)	.002	.001
Urge incontinence episodes per wk from voiding diary
6 mo	3 (−23, 38)	−21 (−41, 6)	.10	−43 (−58, −23)	≤.001	−30 (−49, −5)	.009	.003
12 mo	−27 (−48, 4)	−38 (−57, −8)	.43	−58 (−72, −35)	.02	−56 (−71, −35)	.01	.005
18 mo	−33 (−51, −8)	−48 (−66, −19)	.20	−56 (−71, −33)	.06	−62 (−73, −46)	.001	.002
24-h involuntary urine loss from pad test
6 mo	−38 (−8, −53)	−23 (0, −41)	.45	−50 (−35, − 60)	.23	−55 (−41, −66)	.1	.01
12 mo	−46 (−27, −61)	−47 (−30, −60)	.97	−63 (−50, −72)	.08	−66 (−55, −74)	.05	.02
18 mo	−40 (−20, −56)	−59 (−45, −69)	.06	−56 (−40, −68)	.18	−62 (−47, −73)	.06	.10

^*Adjusted for treatment group, clinic, age, race, alcohol use, smoking status, number of live births, pelvic floor exercises, and kilocalories burned.

^†Reference group.

^‡P value for comparison with weight gain as the reference group.

^§Test for trend based on orthogonal contrasts in parameters of the generalized estimating equation negative binomial model.