Table 3.

Statistical significance of the model for each variable considered (rows) and subject group (columns)

	PD OFF	PD ON	Controls
Peak velocity (5A)	< 10−4 (13/14)	< 10−4 (14/14)	< 10−4 (16/16)
Peak acceleration (5B)	< 10−4 (14/14)	< 10−4 (14/14)	< 10−4 (16/16)
Time to peak velocity (5C)	< 10−4 (13/14)	< 10−4 (13/14)	< 10−4 (16/16)
Time to peak acceleration (5D)	0.018 (11/14)	0.011 (10/14)	0.013 (10/16)

Permutation tests were used for each subject on the relative error of the model, defined as (model-data)/data. These tests defined a p value for each individual and variable considered. The group p value listed in the table is the probability of the test outcome being due to chance in at least half of the individuals (for conjunction group analysis, see Materials and Methods). Values in parentheses are the number of subjects in which the individual test was significant at the 0.05 level.