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Table 1 Sample characteristics

From: Impaired sleep quality is associated with concurrent elevations in inflammatory markers: are post-menopausal women at greater risk?

Variables

Men (n = 53)

Premenopausal women (n = 38)

Postmenopausal women (n = 31)

Age (years)***

44.5 ± 11.3

37.8 ± 9.3

55.3 ± 4.5

Years of schooling

16.1 ± 3.1

16.1 ± 2.5

15.9 ± 2.6

Family income1

 < 30,000$ CDN

11 (21.6%)

6 (15.8%)

8 (25.8%)

 30,000–59,999$

19 (37.3%)

15 (39.5%)

12 (38.7%)

 ≥ 60,000$

21 (41.2%)

17 (44.7%)

11 (35.5%)

Health habits

 Smoking, n (%)

8 (15%)

6 (16%)

1 (3%)

 Exercise (yes/no)+

38 (72%)

22 (58%)

26 (84%)

 Exercise (hours/week)*

4.3 ± 4.6

2.2 ± 2.8

4.1 ± 2.7

Metabolic activity

 Body mass index (kg/m2)

25.4 ± 3.8

24.9 ± 5.2

25.4 ± 4.0

 Waist circumference (cm)*

90.2 ± 9.9

84.6 ± 13.0

83.8 ± 11.2

 LDL-cholesterol (mmol/L)**

3.0 ± 0.9

2.7 ± 0.6

3.4 ± 0.8

 HDL-cholesterol (mmol/L)***

1.2 ± 0.3

1.4 ± 0.3

1.5 ± 0.3

 Fasting glucose (mmol/L)**

5.2 ± 0.6

4.9 ± 0.4

5.4 ± 0.8

 Fasting insulin (pmol/L)

47.9 ± 30.5

43.3 ± 21.2

48.4 ± 34.8

Ambulatory BP

 Day SBP (mmHg)**

120.1 ± 8.2

113.5 ± 9.3

116.5 ± 9.5

 Day DBP (mmHg)**

74.5 ± 6.4

69.9 ± 7.4

73.1 ± 8.0

 Night SBP (mmHg)

107.8 ± 10.5

103.7 ± 12.2

103.7 ± 10.4

 Night DBP (mmHg)

62.5 ± 8.3

59.7 ± 8.6

62.1 ± 8.7

Inflammatory markers

 CRP (mg/L)

1.1 ± 1.1

1.5 ± 2.1

1.9 ± 2.2

 TNF-α (ng/L)+

1.3 ± 0.4

1.2 ± 0.9

1.1 ± 0.3

 IL-6 (ng/L)+

1.1 ± 0.9

0.9 ± 0.5

1.2 ± 0.7

 MPO (μg/L)

53.6 ± 17.7

53.6 ± 14.1

53.6 ± 16.8

Questionnaires

 BDI-II score

6.3 ± 7.9

7.7 ± 8.0

6.6 ± 7.5

 PSQI overall score

5.6 ± 2.9

4.8 ± 2.9

6.5 ± 4.1

 PSQI > 5, n (%)

25 (47%)

15 (40%)

15 (48%)

  1. CRP C-reactive protein, TNF-α tumor necrosis factor-alpha, IL-6 interleukin-6, MPO myeloperoxidase, SBP systolic blood pressure, DBP diastolic blood pressure, LDL low density lipoprotein, HDL high density lipoprotein, BDI-II Beck Depression Inventory-II, PSQI Pittsburgh Sleep Quality Index
  2. 1N = 120
  3. *P < 0.05
  4. **P < 0.01
  5. ***P < 0.001
  6. +P < 0.07