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Table 1 Study participant characteristics by sleep duration, NHANES 2005–2006

From: Relationship between sleep characteristics and measures of body size and composition in a nationally-representative sample

 

Sleep duration

 

≤56 h

6 h

7 h

8 h

≥9 h

Age, year, mean (SD)

42.1 (15.9)

42.9 (15.0)

42.4 (15.1)

43.2 (16.9)

41.7 (20.7)

Female, %

39.4

47.3

49.7

49.3

57.3

Non-Hispanic White, %

58.6

67.0

73.6

71.9

68.8

Non-Hispanic Black, %

23.5

14.9

8.4

8.9

12.3

Less than high school grad, %

20.2

13.4

14.5

15.0

26.2

Current smoker, %

34.8

25.4

17.8

18.6

27.1

Former smoker, %

16.7

20.0

23.4

24.1

16.9

Alcohol consumption, > 1 drink/day, %

15.1

14.1

12.5

14.8

11.3

Fat intake, mean (SD), gram/kcal

37.2 (8.4)

37.7 (8.8)

37.3 (8.5)

37.1 (8.2)

37.1 (7.9)

Carbohydrate intake, mean (SD), gram/kcal

124 (23)

121 (25)

121 (23)

121 (23)

124 (24)

Total caloric intake, kcal

2256 (934)

2186 (864)

2224 (852)

2176 (866)

2084 (870)

History of diabetes, %

8.1

5.2

4.3

6.3

7.1

Sit during the day and not walk about much, %

21.0

18.7

21.1

20.7

26.9

  1. Percentages, means and standard deviations are weighted