Psychosis Assessment in Early-Stage Parkinson’s Disease: Comparing Parkinson’s Psychosis Questionnaire with the Brief Psychiatric Rating Scale in a Portuguese Sample

Table 1

Sociodemographic and clinical data (𝑛=36).

Gender (male/female)	17/19
Age (years)	73.17 (6.54)*
Education	4 (4)*
Duration of illness (years)	3.17 (1.30)*
Levodopa equivalent dose (mg)	300** (range 0–1500)
Hoehn and Yahr stage (on)	2** (range 1–3)
MMSE	27.22 (2.53)*
FAB	13.31 (3.13)*
PPQ (total score)	3.69 (3.42)* (range 0–12)
PPQ (% cases)	41.7
BPRS (total score)^+	1.26 (0.16)*
BPRS (positive symptoms score)^+	1.24 (0.31)*
BPRS (negative symptoms score)^+	1.19 (0.24)*
BPRS (depression/anxiety score)^+	1.60 (0.54)*
BPRS (mania/hostility score)^+	1.04 (0.05)*

*mean (standard deviation).
**median.
⁺weighted scores; range 1 (not present) through 7 (extremely severe).