Table 3.

Hurdle Poisson model for number of falls post-baseline

	Baseline Variables	Risk Ratio (RR)	Standard Error	p-value	95% CI
Number of falls (Poisson part)	Age (yrs)	1.02	0.01	0.09	(1.00, 1.04)
	UPDRS Falling>0	2.92	0.65	<.0001	(1.64,4.20)
	PDQ-39 Summary score	1.00	0.01	0.65	(0.98, 1.01)
		Odds Ratio (OR)	Standard Error	p-value	95% CI
Probability of remaining fall-free (Hurdle part)	Age (yrs)	0.95	0.01	<.001	(0.93, 0.98)
	UPDRS Falling>0	0.14	0.07	<.0001	(0.00, 0.28)
	PDQ-39 Summary score	0.96	0.01	0.0001	(0.93, 0.98)

Model was fit with 412 complete observations (1 deleted due to missing values).

Event rate for post-baseline falls = 20% (n=84).