Visit vs Number of hours napping per week

	N	Mean	StdDev	Median	Min	Max	Unknown	Total
Visit 1	2,911	1.9	± 3.1	0.0	0.0	18.0	-	2,911
Visit 2	-	-	-	-	-	-	-	-

Age at Sleep Visit 1 vs Number of hours napping per week

Visit 1

	N	Mean	StdDev	Max	Unknown	Total
Total	2,911	1.9	± 3.1	18.0	-	2,911
67.0 to 72.0 years	728	1.5	± 2.7	18.0	-	728
72.0 to 76.0 years	728	1.7	± 2.8	18.0	-	728
76.0 to 80.0 years	728	2.1	± 3.1	18.0	-	728
80.0 to 90.0 years	727	2.5	± 3.6	18.0	-	727

Gender vs Number of hours napping per week

Visit 1

	N	Mean	StdDev	Median	Min	Max	Unknown	Total
Total	2,911	1.9	± 3.1	0.0	0.0	18.0	-	2,911
Female	-	-	-	-	-	-	-	-
Male	2,911	1.9	± 3.1	0.0	0.0	18.0	-	2,911

Race Category vs Number of hours napping per week

Visit 1

	N	Mean	StdDev	Median	Min	Max	Unknown	Total
Total	2,911	1.9	± 3.1	0.0	0.0	18.0	-	2,911
White	2,651	1.9	± 3.0	0.0	0.0	18.0	-	2,651
African American	99	2.4	± 3.9	0.0	0.0	18.0	-	99
Asian	85	2.4	± 3.6	0.0	0.0	18.0	-	85
Native Hawaiian or Other Pacific Islander	3	1.3	± 2.3	0.0	0.0	4.0	-	3
American Indian or Alaskan Native	1	1.0	-	1.0	1.0	1.0	-	1
Multiracial	30	2.2	± 3.3	1.5	0.0	11.0	-	30
Unknown	42	1.6	± 2.9	0.0	0.0	11.0	-	42

MrOS Sleep Study

Histogram