Table 3.

Pigmentation / melanoma in relation to Parkinson’s Disease risk in the Parkinson’s Genes and Environment Study

variables		Case	Control	Adjusted OR (95%CI)*	Adjusted P*	P for trend*
Hair color						0.202
	Black	60	156	ref.
	Brown	424	861	1.25 (0.90-1.73)	0.179
	Auburn	19	38	1.28 (0.68-2.44)	0.442
	Blonde	79	236	0.87 (0.58-1.29)	0.475
	Red	14	27	1.36 (0.66-2.79)	0.406
Eye color						0.759
	Blue/Gray	255	585	ref.
	Green	60	124	1.08 (0.77-1.53)	0.654
	Light brown/Hazel	144	316	1.05 (0.82-1.35)	0.691
	Brown/Black	131	292	1.03 (0.80-1.33)	0.819
Skin color						0.088
	Light	244	580	ref.
	Medium	340	704	1.22 (0.99-1.49)	0.057
	Dark	16	36	1.11 (0.60-2.06)	0.736
Melanoma						0.276
	No	790	1597	Ref
	Yes	18	26	1.32 (0.71-2.44)	0.375

^*Adjusted for year of birth, sex, smoking status and caffeine intake.