Quantitative Analysis of Parkinsonian Tremor in a Clinical Setting Using Inertial Measurement Units

Table 2

Comparison of approximation entropy between PD and CO.

Segment	Group	ApEn_kin_acc (mean ± SD)	ApEn_pos_acc (mean ± SD)	ApEn_kin_gyr (mean ± SD)	ApEn_pos_gyr (mean ± SD)
Right upper arm	CO	0.452 ± 0.139	0.967 ± 0.168	0.394 ± 0.107	0.455 ± 0.188
	PD	0.578 ± 0.208	0.947 ± 0.154	0.416 ± 0.175	0.552 ± 0.135
Left upper arm	CO	0.368 ± 0.195	0.991 ± 0.153	0.329 ± 0.097	0.541 ± 0.223
	PD	0.552 ± 0.198	0.860 ± 0.181	0.475 ± 0.119	0.577 ± 0.168
Right forearm	CO	0.240 ± 0.081	0.859 ± 0.201	0.383 ± 0.178	0.429 ± 0.151
	PD	0.387 ± 0.194	0.906 ± 0.217	0.375 ± 0.098	0.573 ± 0.197
Left forearm	CO	0.297 ± 0.115	0.891 ± 0.229	0.279 ± 0.069	0.516 ± 0.183
	PD	0.491 ± 0.227	0.858 ± 0.281	0.369 ± 0.104	0.579 ± 0.200
Right hand	CO	0.343 ± 0.112	0.776 ± 0.156	0.283 ± 0.070	0.402 ± 0.124
	PD	0.400 ± 0.181	0.762 ± 0.210	0.311 ± 0.139	0.494 ± 0.179
Left hand	CO	0.373 ± 0.111	0.804 ± 0.180	0.291 ± 0.095	0.463 ± 0.180
	PD	0.447 ± 0.155	0.754 ± 0.194	0.321 ± 0.103	0.482 ± 0.169