We then adjusted for sex, age, and disease duration in a logistic regression model, which confirmed the association between LRRK2 mutations and dyskinesia and motor fluctuations (dyskinesia: OR = 2.9, 95% CI = 1.14–7.12, P = 0.022; motor fluctuations: OR = 3.4, 95% CI = 1.29–9.75, P = 0.016). The gene discussed is LRRK2; the disease is drug-induced dyskinesia.