Table 2.

The association between statin usage during clinical visits 1–4 (1987–1998) and PD risk after 1998

Model		PD	Non-PD	OR (95%C.I.)	P value
Basic model*	No	37	11208	1.00
	Yes	10	1564	1.81 (0.89–3.67)	0.10
	Don’t know	9	2421	1.46 (0.69–3.10)	0.32
Further adjusted for baseline total cholesterol	No	37	11208	1.00
	Yes	10	1564	2.32 (1.11–4.87)	0.03
	Don’t know	9	2421	1.47 (0.69–3.11)	0.32
Further adjusted for average total cholesterol across Visits 1–4	No	37	11208	1.00
	Yes	10	1564	2.21 (1.07–4.58)	0.03
	Don’t know	9	2421	1.54 (0.73–3.26)	0.26
Further adjusted for average total cholesterol, diabetes, and coronary heart disease	No	37	11208	1.00
	Yes	10	1564	2.39 (1.11–5.13)	0.03
	Don’t know	9	2421	1.51 (0.27–8.63)	0.64

^*Adjusted for age, gender, race, smoking and caffeine intake