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

Table 1

Categorization of response options on standard PRO measures and PGI severity rating.

Standard patient-reported outcome measures	Patient Generated Index
3 categories	0–3; 4–6; 7–10
4 categories	0–3; 4–6; 7–8; 9–10
5 categories	0–1; 2–3; 4–6; 7–8; 9–10

0 is the worst they can imagine and 10 exactly as they would like to be.