Table 3.

Kendall’s tau correlation coefficients comparing disease dominantly affected upper limb kinematics, gait and UPDRS scores.

		Cadence (steps/min)	Mean stride time (s)	Mean stride length (cm)	CV stride time (%)	CV stride length (%)	OFF Motor UPDRS	OFF Total UPDRS	OFF brady motor UPDRS subscore	OFF brady ADL UPDRS subscore	MoCA
Secondary comparisons
Mean tap amplitude (norm. unit)	Control	− 0.091, 0.535	0.066, 0.655		− 0.011, 0.941	0.054, 0.710	0.192, 0.202	0.182, 0.222	–	–	0.085, 0.588
	PD	0.054, 0.692	− 0.063, 0.646		− 0.242, 0.076	− 0.185, 0.175	− 0.375, 0.006*	− 0.396, 0.004*	− 0.360, 0.011	− 0.390, 0.006*	0.135, 0.342
Exploratory comparisons
CV tap amplitude (%)	Control	0.069, 0.637	− 0.044, 0.766	− 0.025, 0.862	− 0.025, 0.862	− 0.105, 0.472	− 0.222, 0.140	− 0.204, 0.171	–	–	− 0.037, 0.817
	PD	0.043, 0.755	− 0.023, 0.868	− 0.151, 0.269	0.225, 0.100	0.179, 0.189	0.312, 0.023	0.287, 0.037	0.289, 0.041	0.266, 0.059	− 0.051, 0.720
Mean tap interval (s)	Control	− 0.130, 0.372	0.135, 0.358	0.203, 0.165	− 0.007, 0.960	0.152, 0.298	0.045, 0.764	− 0.033, 0.823	–	–	0.073, 0.643
	PD	0.077, 0.574	− 0.074, 0.588	0.202, 0.139	− 0.254, 0.064	− 0.185, 0.175	− 0.198, 0.150	− 0.281, 0.041	− 0.134, 0.343	− 0.337, 0.017	0.111, 0.435
CV tap interval (%)	Control	0.094, 0.519	− 0.062, 0.673	0.138, 0.346	0.043, 0.766	0.072, 0.620	− 0.203, 0.177	− 0.211, 0.156	–	–	0.138, 0.381
	PD	− 0.066, 0.632	0.074, 0.588	− 0.259, 0.058	0.208, 0.128	0.128, 0.348	0.226, 0.099	0.195, 0.156	0.265, 0.061	0.089, 0.529	− 0.117, 0.410
Tap frequency (taps/s)	Control	0.169, 0.253	− 0.173, 0.242	− 0.147, 0.320	− 0.029, 0.842	− 0.147, 0.320	− 0.046, 0.764	− 0.007, 0.960	–	–	− 0.049, 0.757
	PD	− 0.081, 0.559	0.078, 0.573	− 0.219, 0.112	0.242, 0.079	0.179, 0.195	0.229, 0.099	0.294, 0.035	0.175, 0.220	0.341, 0.016	− 0.140, 0.331

Data reported as: Kendall’s tau correlation coefficient, p value; significant correlations are in bold.

*correlations that were significant (p < 0.05) after application of a Benjamini–Hochberg adjustment.