[Table/Fig-2]:

Correlation analysis

	PEARSON CORRELATION ANALYSIS (n=50)
	DURATION		STAGING		SEVERITY
	r	p-value	r	p-value	r	p-value
PDSS	-0.831	<0.05	-0.826	<0.05	-0.955	<0.05
ESS	-0.845	<0.05	-0.836	<0.05	-0.828	<0.05
TST	-0.762	<0.05	-0.745	<0.05	-0.748	<0.05
SL.MAINTANENCE	-0.846	<0.05	-0.845	<0.05	-0.98	<0.05
SL.EFFICIENCY	-0.784	<0.05	-0.842	<0.05	-0.751	<0.05
SL.LATENCY	-0.835	<0.05	-0.854	<0.05	-0.91	<0.05
PLMS	-0.557	<0.05	-0.647	<0.05	-0.506	<0.05
AHI	0.043	>0.05	0.167	>0.05	0.221	>0.05

UPDRS - Unified parkinson’s disease rating scale; PDSS - Parkinson disease sleepiness scale;

ESS - Epworth sleepiness scale; TS - Total sleep

PLMS - Periodic limb movement syndrome; AHI - Apnoea hypopnoea index