Validation of an Individualized Measure of Quality of Life, Patient Generated Index, for Use with People with Parkinson’s Disease

Table 3

Comparison of the PGI against standard PRO measures at the domain level among people who endorsed the area.

	Identified as an area of concern on the PGI; Mean (SD); Median (Q1–Q3) (N)	Not identified as an area of concern on the PGI; Mean (SD); Median (Q1–Q3) (N)	Independent t-test or Mann–Whitney U test, value
Walking (higher is better)	45.0 (27.3)	71.9 (24.0)	0.0006
RAND-36 physical function index	40.0 (25.0–65.0) (19)	80.0 (50.0–95.0) (46)
Depression (higher is worse)	4.5 (2.8)	1.8 (2.2)	0.009
Geriatric depression scale	4.5 (2.5–7.0) (8)	1.0 (0.0–3.0) (62)
Memory/concentration (higher is worse)	34.6 (12.1)	23.4 (10.6)	0.0004
Perceived Deficits Questionnaire-20	36.5 (25.0–44.0) (15)	22.0 (17.0–30.0) (52)

SD, standard deviation; N, number; Q1, quartile 1; Q3, quartile 3.