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

Table 2

Comparison of levodopa equivalent dose and BPRS scores between PPQ cases and noncases.

	PPQ non-cases mean (standard deviation)	PPQ cases mean (standard deviation)	Adjusted^+  𝑃 value (Mann-Whitney test)
Levodopa equivalent dose	302.38 (377.07)	527.00 (363.73)	0.336
MMSE	27.33 (2.9)	27.07 (1.9)	>1
FAB	11.67 (3.12)	10.80 (3.19)	>1
BPRS—total score	1.23 (0.16)	1.31 (0.16)	>1
BPRS—positive symptoms	1.10 (0.16)	1.43 (0.37)	0.016
BPRS—negative symptoms	1.15 (0.24)	1.24 (0.23)	0.936
BPRS—mania/disorganization	1.04 (0.06)	1.03 (0.051)	>1
BPRS—depression/anxiety	1.62 (0.57)	1.57 (0.51)	>1

⁺Bonferroni correction was used to correct for multiple comparisons.