Robot-assisted and conventional therapies produce distinct rehabilitative trends in stroke survivors

Table 3 Details of all seven principal components

Metric	1st PC	2nd PC	3rd PC	4th PC	5th PC	6th PC	7th PC
Conventional therapy
FMA	0.81	0.41	−0.71	−0.05	−0.10	1.00	−0.26
WMFTf	1.00	−0.64	0.20	−0.32	−0.22	0.16	1.00
WMFTt	0.76	−0.94	−0.28	−0.28	−0.21	−0.42	−0.83
Mean strength	0.83	0.11	−0.48	1.00	0.39	−0.50	0.23
Grip strength	0.59	0.13	1.00	0.63	−0.57	0.25	−0.36
MAL	0.53	1.00	−0.15	−0.47	−0.65	−0.66	0.08
SIS	0.81	0.39	0.58	−0.47	1.00	−0.05	−0.23
% Contribution	31.02 %	18.48 %	15.93 %	11.18 %	9.20 %	8.51 %	5.67 %
Cumulative %	31.02 %	49.50 %	65.43 %	76.62 %	85.82 %	94.33 %	100.00 %
Robot-assisted therapy
FMA	0.87	0.23	0.44	−0.86	−0.60	0.44	0.58
WMFTf	0.76	0.83	0.12	0.15	1.00	0.31	0.24
WMFTt	1.00	0.41	−0.40	−0.38	−0.19	−0.50	1.00
Mean strength	−0.64	1.00	−0.26	−0.36	−0.10	−0.95	0.60
Grip strength	−0.85	0.43	−0.43	−0.79	0.09	1.00	−0.37
MAL	−0.18	1.00	0.29	1.00	−0.58	0.41	−0.30
SIS	−0.56	0.11	1.00	−0.51	0.25	−0.36	−0.60
% Contribution	30.35 %	21.16 %	15.60 %	12.97 %	8.01 %	6.66 %	5.26 %
Cumulative %	30.35 %	51.51 %	67.11 %	80.08 %	88.08 %	94.74 %	100.00 %

For each therapy we show all seven principal components (PCs) as per their loadings and percent variance explained. The 3rd to 7th PCs are included for completeness, but we refrain from interpreting them as they each explain increasingly less variance

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