Parkinson Disease and Coffee and Alcohol Consumption: Conditional Logistic Regression Analysis on Data of Patients and Hospital Controls.

Abbreviations: OR = odds ratio, CI = confidence interval. aCoffee consumption information was missing for one control, and was thus excluded in analyses including coffee consumption. bThe adjusted model includes smoking and/or coffee consumption (in quartiles). cThe first P value for trend was based on analyses with the exposure as a continuous variable including the persons from the reference category. The second P value for trend was based on analysis whereby the persons from the reference category are excluded.