Table 4 Effect size of sleep duration on SBP in each subgroup.

From: Association between sleep duration on workdays and blood pressure in non-overweight/obese population in NHANES: a public database research

Characteristic

N

6–8 h

 < 6 h (β, 95% CI, P)

 ≥ 8 h (β, 95% CI, P)

Gender

Male

1378

Ref

1.22 (− 1.31, 3.76) 0.3440

0.92 (− 0.39, 2.23) 0.1685

Female

1509

Ref

5.99 (2.93, 9.04) 0.0001

2.41 (1.07, 3.75) 0.0004

Age

< 45

1884

Ref

1.18 (− 0.85, 3.20) 0.2543

0.74 (− 0.16, 1.65) 0.1082

≥ 45, < 60

495

Ref

4.80 (− 0.72, 10.32) 0.0890

0.21 (− 2.44, 2.86) 0.8777

≥ 60

508

Ref

7.23 (1.08, 13.38) 0.0217

1.86 (− 1.60, 5.32) 0.2920

Race

Mexican American

302

Ref

2.09 (− 4.11, 8.30) 0.5096

− 0.38 (− 2.87, 2.11) 0.7649

White

968

Ref

6.64 (2.82, 10.45) 0.0007

1.91 (0.28, 3.54) 0.0215

Black

550

Ref

− 0.76 (− 4.12, 2.60) 0.6587

1.04 (− 1.41, 3.49) 0.4063

Others

1067

Ref

2.95 (− 0.24, 6.13) 0.0699

2.06 (0.50, 3.61) 0.0097

  1. Adjusted for: Gender; Age; Race; alcohol; Albumin; Creatinine; Hemoglobin; diabetes; hypertension; snort or stop breathing; smoke; TC; BMI; AST; HDL except the subgroup variable.
  2. CI confidence interval, Ref reference, TC total cholesterol, BMI body mass index, AST aspertate aminotransferase, HDL high-density lipoprotein.
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