Table 4.

NURSES’ HEALTH STUDY II: Relative Risk of UI¹, According to Vitamin D Intake from Food and Supplements.

Vitamin D	Cases	Person-years	Age-adjusted RR (95 % CI)	Multi-variable adjusted RR*
	URGENCY UI
0– < 200IU	350	34430	1.0 (REF)	1.0 (REF)
200– < 400	323	34542	0.93 (0.79,1.08)	0.95 (0.82,1.11)
400– < 600	325	35388	0.88 (0.76,1.03)	0.91 (0.78,1.06)
600– < 800	247	28066	0.82 (0.69,0.96)	0.84 (0.71,0.99)
800– < 1000	141	13677	0.93 (0.76,1.13)	0.96 (0.79,1.18)
1000+	136	14063	0.85 (0.70,1.04)	0.88 (0.71,1.07)
				P trend = 0.1
	MIXED UI
0– < 200IU	320	34470	1.0 (REF)	1.0 (REF)
200– < 400	279	34813	0.86 (0.73,1.00)	0.90 (0.76,1.05)
400– < 600	314	35510	0.95 (0.81,1.12)	1.01 (0.86,1.19)
600– < 800	250	28253	0.92 (0.78,1.09)	0.99 (0.84,1.18)
800– < 1000	112	13879	0.81 (0.65,1.01)	0.88 (0.71,1.10)
1000+	110	14362	0.73 (0.59,0.91)	0.79 (0.63,0.99)
				P trend = 0.1
	STRESS UI
0– < 200IU	666	32,692	1.0 (REF)	1.0 (REF)
200– < 400	699	32,718	1.06 (0.95, 1.18)	1.07 (0.96,1.19)
400– < 600	662	33,842	0.99 (0.89, 1.11)	1.01 (0.90,1.12)
600– < 800	552	26,798	1.06 (0.95, 1.19)	1.09 (0.97,1.23)
800– < 1000	246	13,127	0.98 (0.84, 1.14)	1.01 (0.87,1.17)
1000+	228	13,266	0.91 (0.78, 1.06)	0.94 (0.81,1.10)
				P trend = 0.6

¹Urinary Incontinence (UI).

^*Multivariable models adjusted for age, body mass index, cigarette smoking, parity, use of postmenopausal hormone therapy, physical activity.