Impact of Gastrointestinal Symptoms on Health-Related Quality of Life in an Australian Parkinson’s Disease Cohort

Table 2

Analysis of associations between different measures of constipation and total PDQ-39 score in PD cohort.

Constipation measures	PDQ-39 total score
	Naïve			Corrected^^
	Intercept	β-coefficient	values	Intercept	β-coefficient	values
Bristol stool chart	36.766	−1.55	0.288	10.719	1.326	0.318
Frequency of defecation	34.365	−2.98	0.146	15.573	0.043	0.981
Self-reported constipation	25.559	10.558	0.005	11.731	7.507	0.024
Constipation (combined)	22.208	14.375	<0.001	10.575	9.619	0.006

^{^}corrected for LEDD and disease duration. PD: Parkinson’s disease. PDQ-39: Parkinson’s disease questionnaire—39. GSRS: Gastrointestinal Symptom Rating Scale.