Table 2.

Associations of clinical features with mortality after deep brain stimulation in patients determined by a time-dependent Cox proportional hazard model with time-dependent variables.

	Coefficient	Hazard ratio (95% CI)	P-value
Age of onset	0.047	1.048 (1.005–1.093)	0.028
Preoperative total LEDD	0.001	1.001 (1.000–1.001)	0.038
Preoperative falling on-medication score	−1.274	0.280 (0.037–2.098)	0.215
T_COV_*preoperative falling on-medication score	0.308	1.361 (1.001–1.850)	0.049

CI, confidence interval; LEDD, levodopa equivalent daily dose Covariates; sex, age at onset, disease duration at surgery, preoperative BMI, depression, T_COV_^*depression, axial score, falling score, and HY stage.