Table 5

Results of conditional logistic multivariate regression analysis (the final model was fitted on 202 matched sets)

Risk factorOR (95% CI)p Value
Hypertension0.36  (0.16 to 0.65)0.002
Eye diseases3.11 (1.38 to 7.02)0.006
Head or face trauma with loss of consciousness3.2 (1.04 to 10.1)0.042
Neck or trunk trauma7.84 (1.35 to 45.7)0.022
Cigarette smoking (current smokers)0.51 (0.29 to 0.89)0.018
Family history of dystonia10.9 (1.39 to 84.9)0.023
Family history of tremor5.66 (1.81 to 17.7)0.003