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Table 1 Characteristics of participants by sleep duration groups

From: Association between sleep duration and albumin in US adults: a cross-sectional study of NHANES 2015–2018

sleep duration (h)

 

\(\le\) 5

5–6

6–7

7–8

8–9

\(>\) 9

P value

N

694

1051

2248

2926

1890

1164

 

sleep duration (ungrouped, h)

4.46 ± 0.67

5.89 ± 0.21

6.85 ± 0.23

7.80 ± 0.24

8.78 ± 0.25

10.28 ± 0.86

 < 0.0001

sleep timing (%)

      

 < 0.0001

 18:00–21:59

2.35

7.14

11.15

17.54

28.37

38.11

 

 22:00–22:59

9.58

16.60

29.03

36.15

35.51

27.66

 

 23:00–23:59

15.25

33.20

32.32

28.50

19.45

17.22

 

 later than 00:00

72.83

43.06

27.50

17.82

16.67

17.01

 

age (years)

49.01 ± 16.10

47.33 ± 15.13

47.36 ± 15.73

47.93 ± 16.65

49.10 ± 18.54

49.82 ± 20.32

0.0002

sex (%)

      

 < 0.0001

 male

54.43

55.38

55.74

46.80

38.49

39.59

 

 female

45.57

44.62

44.26

53.20

61.51

60.41

 

race

      

 < 0.0001

 Mexican American

17.56

18.54

16.56

13.58

14.84

17.12

 

 non-Hispanic white

48.41

56.31

62.47

68.50

67.58

59.90

 

 non-Hispanic black

23.87

15.92

10.56

7.89

8.20

13.83

 

 other race

10.16

9.23

10.41

10.03

9.38

9.15

 

marital status (%)

      

 < 0.0001

 married or living with partner

52.72

63.89

67.28

67.04

63.62

52.60

 

 living alone

47.28

36.11

32.72

32.96

36.38

47.40

 

moderate work activity (%)

      

 < 0.0001

 yes

51.69

54.68

47.91

47.82

45.29

37.73

 

 no

48.31

45.32

52.09

52.18

54.71

62.27

 

TP (g/L)

71.68 ± 4.57

70.94 ± 4.39

71.25 ± 4.29

70.97 ± 4.19

70.75 ± 4.46

71.12 ± 4.61

 < 0.0001

ALT (IU/L)

26.43 ± 21.66

25.58 ± 16.57

24.92 ± 16.58

24.01 ± 16.41

23.43 ± 16.29

22.40 ± 15.94

 < 0.0001

AST (IU/L)

25.63 ± 18.35

24.23 ± 12.30

24.06 ± 13.01

23.62 ± 10.20

23.68 ± 11.96

23.57 ± 13.98

0.0135

Crlog2 (μmol/L)

6.25 ± 0.40

6.23 ± 0.38

6.23 ± 0.36

6.20 ± 0.37

6.18 ± 0.38

6.23 ± 0.46

 < 0.0001

UACRlog2 (mg/g)

3.26 ± 1.52

3.07 ± 1.45

3.07 ± 1.56

3.08 ± 1.47

3.14 ± 1.41

3.51 ± 1.78

 < 0.0001

HS-CRP (mg/L)

3.65 ± 4.55

4.38 ± 8.20

3.51 ± 5.98

3.86 ± 7.47

3.81 ± 6.31

4.84 ± 10.44

 < 0.0001

GLU (mmol/L)

5.71 ± 2.09

5.63 ± 1.87

5.55 ± 1.75

5.52 ± 1.90

5.52 ± 1.71

5.73 ± 2.02

0.0079

BMI (kg/m2)

30.42 ± 7.62

30.52 ± 7.52

29.84 ± 7.14

29.27 ± 6.67

29.58 ± 7.20

29.22 ± 7.02

 < 0.0001

hypertension

      

 < 0.0001

 yes

40.07

34.95

30.46

30.79

31.12

38.41

 

 no

59.78

65.05

69.45

69.13

68.73

61.43

 

 unknown

0.15

 

0.09

0.08

0.15

0.16

 

high cholesterol (%)

      

 < 0.0001

 yes

34.32

33.75

31.49

33.10

34.84

36.24

 

 no

64.71

65.69

68.20

66.80

64.78

62.62

 

 unknown

0.97

0.56

0.31

0.11

0.38

1.14

 

cancer or malignancy (%)

      

 < 0.0001

 yes

9.26

8.44

8.85

10.38

13.88

13.19

 

 no

90.74

91.28

91.13

89.62

85.96

86.81

 

 unknown

 

0.27

0.03

 

0.16

  

ALB (g/L)

41.41 ± 3.48

41.81 ± 3.44

42.49 ± 3.68

42.50 ± 3.54

42.04 ± 3.67

41.66 ± 3.98

 < 0.0001

  1. N referred to sample size
  2. Mean ± SEs for continuous variables, P values were calculated by weighted linear regression model
  3. Percentage (%) for categorical variables, P values were calculated by weighted chi-square test
  4. Abbreviations: ALB Albumin, TP Total Protein, ALT Alanine aminotransferase, AST Aspartate aminotransferase, Cr Creatinine, HS-CRP High Sensitivity C-reactive Protein, GLU Glucose, BMI Body Mass Index, UACR Urinary Albumin-creatinine Ratio
  5. UACR and Cr were estimated after logarithmic transformation
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