Table 4 Predicted risk of cardiovascular diseases based on 10-year Framingham risk scores in different sleep groups and the association between these risk scores and sleep duration according to gender.

From: Short sleep is associated with higher prevalence and increased predicted risk of cardiovascular diseases in an Iranian population: Fasa PERSIAN Cohort Study

Framingham risks of

Sleep duration (hours)

Male

Female

Total

Low risk n (%)

Intermediate-high risk n (%)

OR (95% CI)

Low risk n (%)

Intermediate-high risk n (%)

OR (95% CI)

Low risk n (%)

Intermediate-high risk n (%)

OR (95% CI)

CVD

–5.9

589 (75.1)

192 (24.9)

1.20 (0.96–1.50)

572 (93.9)

37 (6.1)

2.03 (1.25–3.30)a

1372 (83.4)

229 (16.6)

1.44 (1.18–1.75)a

6.0–6.9

644 (79.1)

170 (20.9)

0.96 (0.76–1.20)

733 (95.7)

33 (4.3)

1.41 (0.76–2.32)

1148 (87.1)

203 (12.9)

1.07 (0.87–1.30)

7.0–7.9

782 (78.4)

215 (21.6)

1.00 (reference)

1008 (96.9)

32 (3.1)

1.00 (reference)

1787 (87.9)

247 (12.1)

1.00 (reference)

8.0–8.9

585 (78.1)

164 (21.9)

1.02 (0.81–1.28)

787 (95.5)

37 (4.5)

1.48 (0.81–2.39)

1367 (87.2)

201 (12.8)

1.06 (0.87–1.29)

9.0–

341 (78.8)

92 (21.2)

0.98 (0.74–1.29)

477 (96.0)

20 (4.0)

1.32 (0.74–2.33)

815 (87.9)

112 (12.1)

0.99 (0.78–1.26)

MI

–5.9

734 (95.1)

39 (4.9)

1.20 (0.76–1.89)

608 (99.8)

1 (0.2)

N.A.

1341 (97.2)

39 (2.8)

1.41 (0.90–2.20)

6.0–6.9

776 (95.3)

39 (4.7)

1.14 (0.72–1.79)

765 (99.9)

1 (0.1)

N.A.

1541 (97.5)

39 (2.5)

1.23 (0.79–1.91)

7.0–7.9

956 (95.9)

41 (4.1)

1.00 (reference)

1040 (100)

0

N.A.

1995 (98)

41 (2)

1.00 (reference)

8.0–8.9

725 (96.8)

24 (3.2)

0.77 (0.46–1.28)

824 (100)

0

N.A.

1549 (98.5)

24 (1.5)

0.75 (0.45–1.25)

9.0–

418 (96.5)

15 (3.5)

0.83 (0.45–1.52)

497 (100)

0

N.A.

915 (98.4)

15 (1.6)

0.79 (0.43–1.44)

CHD

–5.9

639 (82.8)

133 (17.2)

1.27 (0.98–1.65)

595 (97.7)

14 (2.3)

2.01 (0.92–4.38)

1228 (89.3)

147 (10.7)

1.48 (1.16–1.88)a

6.0–6.9

709 (87.1)

105 (12.9)

0.90 (0.69–1.19)

757 (98.8)

9 (1.2)

1.01 (0.42–2.42)

1463 (92.8)

114 (7.2)

0.96 (0.75–1.24)

7.0–7.9

857 (86.0)

140 (14.0)

1.00 (reference)

1028 (98.8)

12 (1.2)

1.00 (reference)

1882 (92.5)

152 (7.5)

1.00 (reference)

8.0–8.9

643 (85.8)

106 (14.2)

1.009 (0.76–1.32)

813 (98.7)

11 (1.3)

1.15 (0.50–2.64)

1454 (92.6)

117 (7.4)

0.99 (0.77–1.28)

9.0–

385 (88.9)

48 (11.1)

0.76 (0.53–1.08)

487 (98.0)

10 (2.0)

1.75 (0.75–4.10)

872 (93.8)

58 (6.2)

0.82 (0.60–1.12)

CHD death

–5.9

687 (89.0)

85 (11.0)

0.97 (0.72–1.31)

599 (98.4)

10 (1.6)

2.87 (1.04–7.95)a

1286 (93.1)

95 (6.9)

1.20 (0.90–1.58)

6.0–6.9

732 (89.9)

82 (10.1)

0.88 (0.65–1.19)

762 (99.5)

4 (0.5)

0.90 (0.42–3.21)

1494 (94.6)

86 (5.4)

0.93 (0.70–1.24)

7.0–7.9

885 (88.8)

112 (11.2)

1.00 (reference)

1034 (99.4)

6 (0.6)

1.00 (reference)

1919 (94.2)

118 (5.8)

1.00 (reference)

8.0–8.9

668 (89.2)

81 (10.8)

0.95 (0.70–1.29)

819 (99.4)

5 (0.6)

1.05 (0.50–3.46)

1487 (94.5)

86 (5.5)

0.94 (0.77–1.25)

9.0–

396 (91.5)

37 (8.5)

0.73 (0.50–1.09)

491 (98.8)

6 (1.2)

2.10 (0.67–6.5)

887 (95.4)

43 (4.6)

0.78 (0.55–1.12)

CVD death

–5.9

753 (97.5)

19 (2.5)

0.78 (0.44–1.40)

606 (99.5)

3 (0.5)

N.A.

1359 (98.4)

22 (1.6)

0.98 (0.57–1.69)

6.0–6.9

789 (96.9)

25 (3.1)

0.98 (0.57–1.68)

766 (100.0)

0 (0.0)

N.A.

1555 (98.4)

25 (1.6)

0.97 (0.57–1.64)

7.0–7.9

966 (96.9)

31 (3.1)

1.00 (reference)

1038 (99.8)

2 (0.2)

N.A.

2004 (98.4)

33 (1.6)

1.00 (reference)

8.0–8.9

724 (96.7)

25 (3.3)

1.07 (0.63–1.83)

823 (99.9)

1 (0.1)

N.A.

1547 (98.3)

26 (1.7)

1.02 (0.60–1.71)

9.0–

420 (97.0)

13 (3.0)

0.96 (0.50–1.86)

495 (99.6)

2 (0.4)

N.A.

915 (98.4)

15 (1.6)

0.99 (0.53–1.84)

  1. CVD = Cardiovascular diseases, MI = Myocardial infarction, CHD = Coronary heart disease. Frequency of risk score groups reported as number (percent). OR = odds ratio, CI = confidence interval, N.A. = not applicable due to zero frequency. Statistically significant ORs are bolded (P-value < 0.001).
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