Name

sdmainteffnw5

Label

Standard deviation of the daily sleep maintenance efficiency in non-workdays from actigraphy

Description

Sleep maintenance efficiency is the ratio between sleep duration (i.e. total sleep time, tst) and sleep period in main sleep. Sleep duration is the interval between sleep onset time and sleep offset time while asleep, while sleep period is the interval between sleep onset time and sleep offset time.

Units

percent (%)

Type

numeric

	N	Mean	StdDev	Median	Min	Max	Unknown	Total
Total	1,951	2.6	± 1.8	2.2	0.005	15.2	286	2,237
54.0 to 62.0 years	469	2.4	± 1.8	2.0	0.005	12.0	91	560
62.0 to 69.0 years	484	2.7	± 2.0	2.2	0.006	15.2	75	559
69.0 to 77.0 years	491	2.6	± 1.7	2.1	0.03	14.5	68	559
77.0 to 95.0 years	507	2.7	± 1.7	2.4	0.01	13.8	52	559

	N	Mean	StdDev	Median	Min	Max	Unknown	Total
Total	1,951	2.6	± 1.8	2.2	0.005	15.2	286	2,237
Female	1,075	2.4	± 1.6	2.1	0.006	14.5	123	1,198
Male	876	2.8	± 2.0	2.3	0.005	15.2	163	1,039

	N	Mean	StdDev	Median	Min	Max	Unknown	Total
Total	1,951	2.6	± 1.8	2.2	0.005	15.2	286	2,237
White, Caucasian	736	2.3	± 1.6	1.9	0.005	14.5	94	830
Chinese American	215	2.7	± 2.0	2.3	0.03	15.2	50	265
Black, African-American	548	3.0	± 2.0	2.5	0.05	14.4	68	616
Hispanic	452	2.6	± 1.7	2.2	0.01	13.8	74	526

Multi-Ethnic Study of Atherosclerosis