Table 2.

ORs and 95% CIs for Parkinson’s disease in quartiles for outdoor physical activity and vitamin D intake in the same model

Quartile	Outdoor activity				Total vitamin D intake
	Time (h/week)	n case/n control	Crude OR (95% CI)	Adjusted OR (95% CI)	Intake (μg/d)	n case/n contro	Crude OR (95% CI)	Adjusted OR (95% CI)
1	<2	63/40	1	1	<5	62/44	1	1
2	2–4	56/49	0.748 (0.427, 1.311)	0.739 (0.413, 1.321)	5–8	51/52	0.589 (0.331, 1.049)	0.647 (0.357, 1.170)
3	4–6	47/57	0.550 (0.313, 0.967)	0.501 (0.282, 0.891)	8–12	52/63	0.568 (0.319, 1.009)	0.571 (0.318, 1.022)
4	>6	42/64	0.388 (0.218, 0.692)	0.437 (0.241, 0.795)	>12	43/61	0.505 (0.288, 0.887)	0.538 (0.301, 0.960)
P for trend			0.001	0.002			0.021	0.011

Quartile 1 as reference. n _case/n _control: the number of cases to the number of controls. Adjusted OR: adjusted for sex, age, smoking, alcohol use, education, and BMI