Is the MDS-UPDRS a Good Screening Tool for Detecting Sleep Problems and Daytime Sleepiness in Parkinson’s Disease?

Table 3

Prevalence, frequency, and correlation values for daytime sleep-related problems.

	Prevalence	Frequency of score 0	Frequency of score 1	Frequency of score 2	Frequency of score 3	Frequency of score 4	Median	Percentile 25	Percentile 75	Correlation with MDS-UPDRS item 1.8
MDS-UPDRS item 1.8	75.1%	115	88	224	29	5	2	1	2	1.000
ESS item number 01	69.6%	140	161	109	51		1	0	2	.423^**
ESS item number 02	82.2%	82	157	150	72		1	1	2	.446^**
ESS item number 03	42.1%	267	122	45	27		0	0	1	.373^**
ESS item number 04	51.8%	222	130	79	30		1	0	1	.330^**
ESS item number 05	88.5%	53	103	114	191		2	1	3	.293^**
ESS item number 06	15.4%	390	50	20	1		0	0	0	.249^**
ESS item number 07	55.5%	205	129	76	51		1	0	2	.278^**
ESS item number 08	13.9%	397	45	17	2		0	0	0	.254^**
ESS total score	95.3%						7	4	10	.494^**

< 0.01.