Visit vs Percentage of REM sleep among total sleep duration from type I polysomnography

	N	Mean	StdDev	Median	Min	Max	Unknown	Total
Visit 5	718	18.2	± 7.3	18.4	0.0	43.9	17	735

Participant's age (category) vs Percentage of REM sleep among total sleep duration from type I polysomnography

Visit 5

	N	Mean	StdDev	Median	Min	Max	Unknown	Total
Total	643	18.0	± 7.3	18.1	0.0	43.9	15	658
5-14 yrs old	63	14.3	± 4.3	15.6	0.0	21.6	1	64
15-24 yrs old	111	17.1	± 6.8	16.8	0.0	35.5	1	112
25-34 yrs old	62	19.5	± 6.8	19.4	2.0	32.2	-	62
35-44 years	94	20.0	± 7.0	19.9	2.0	43.9	4	98
45-54 years	142	19.4	± 7.3	19.2	0.0	39.6	6	148
55-64 years	82	19.2	± 7.6	19.8	0.0	40.9	2	84
65-74 years	57	17.0	± 7.2	18.0	0.0	31.9	-	57
75-84 years	30	12.5	± 8.7	13.4	0.0	30.3	1	31
85 years or older	2	4.9	± 1.8	4.9	3.6	6.1	-	2

Participant's sex vs Percentage of REM sleep among total sleep duration from type I polysomnography

Visit 5

	N	Mean	StdDev	Median	Max	Unknown	Total
Total	718	18.2	± 7.3	18.4	43.9	17	735
Female	396	18.4	± 7.5	18.6	43.9	10	406
Male	322	17.9	± 7.0	18.0	40.9	7	329

Participant's race vs Percentage of REM sleep among total sleep duration from type I polysomnography

Visit 5

	N	Mean	StdDev	Median	Min	Max	Unknown	Total
Total	718	18.2	± 7.3	18.4	0.0	43.9	17	735
White	297	17.7	± 7.1	18.2	0.0	36.6	7	304
Black	399	18.5	± 7.4	18.5	0.0	43.9	10	409
More than one race	22	18.7	± 6.0	17.3	9.0	34.3	-	22

Cleveland Family Study

Race