Parkinson’s Disease Gravity Index: A Method by means of Optimal Scaling

Table 6

Correlation between the Parkinson’s Disease Gravity Index and other measures.

	Years of disease	Years with L-dopa	L-dopa doses	S&E	PIMS	CISI1	CISI2	CISI3	CISI4	CISI total
AD	0.15	0.18	0.41	−0.25	0.1	0.23	0.26	−0.06	0.44	0.24
MD	0.5	0.55	0.52	−0.76	0.56	0.76	0.72	0.67	0.52	0.82
DD	−0.01	0.07	0.17	−0.46	0.5	0.34	0.42	0.21	0.33	0.38
AxD	−0.02	0.09	0.07	−0.45	0.5	0.36	0.42	0.22	0.22	0.35
CD	−0.23	−0.28	−0.43	0.57	−0.41	−0.45	−0.5	−0.26	−0.81	−0.6
ApD	0.13	0.22	0.35	−0.59	0.41	0.38	0.49	0.18	0.66	0.5
FD	0.1	0.2	0.27	−0.58	0.46	0.43	0.48	0.19	0.59	0.5
NMD	0.17	0.26	0.34	−0.42	0.46	0.3	0.36	0.19	0.26	0.32
PsD	−0.07	0.03	0.12	−0.31	0.2	0.2	0.27	0.08	0.22	0.2
SD	0.29	0.29	0.37	−0.33	0.33	0.33	0.34	0.13	0.37	0.35
Total	0.19	0.31	0.42	−0.69	0.62	0.53	0.62	0.27	0.53	0.58

AD: age dimension; MD: motor dimension; DD: depression dimension; AxD: anxiety dimension; CD: cognitive dimension; ApD: apathy dimension; FD: fatigue dimension; NMD: nonmotor dimension; PsD: psychosis dimension; SD: sleep dimension.