Hand Dexterity Impairment in Patients with Cervical Myelopathy: A New Quantitative Assessment Using a Natural Prehension Movement

Table 3

Correlation coefficients between all parameters using combined data from pre-and postoperative patients ().

Parameter	2	3	4	5	6	7	8	9	10	11
1. JOA (motor)	.31	−.47	−.63	−.28	−.06	−.21	−.32	−.11	−.15	.09
2. JOA (sensory)		.05	−.03	−.11	−.05	.16	−.15	−.26	−.33	−.24
3. RT			.59	.42	.27	.01	.48	.02	−.12	−.27
4. MT				.71	−.06	.20	.41	.02	.07	−.06
5. MGA					.13	.05	.41	−.02	−.12	−.14
6. ToMGA						−.08	.33	.10	.10	−.06
7. PoMGA							.27	.10	.03	−.04
8. NMD								.27	.18	.17
9. Grip force (sand)									.68	.44
10. Grip force (suede)										.80
11. Grip force (silk)

, . JOA: Japanese Orthopedic Association score; RT: reaction time; MT: movement time; MGA: maximum grip aperture; ToMGA: time of maximum grip aperture; PoMGA: position of maximum grip aperture; NMD: normalized movement distance.