Mean SBP, mean DBP, hypertension prevalence and BP control in middle-aged and elderly Chinese by habitual sleep duration (CHARLS 2011–2012)
| Sleep duration category (hours/night) | ||||||
|---|---|---|---|---|---|---|
| <6 | 6–7 (≥6 and <7) | 7–8 (≥7 and <8) | 8–9 (≥8 and <9) | ≥9 | p Value | |
| All | n=2693 | n=1903 | n=1762 | n=1981 | n=747 | |
| SBP, mean (SD) | 131.93 (22.83) | 132.33 (21.37) | 129.55 (20.90) | 131.44 (19.86) | 131.25 (23.49) | 0.107* |
| DBP, mean (SD) | 75.47 (12.39) | 76.72 (12.07) | 75.75 (12.12) | 77.12 (11.93) | 76.58 (13.19) | 0.015* |
| Hypertension, n (%) | 1194 (45.43) | 795 (42.45) | 659 (37.15) | 811 (43.07) | 326 (41.92) | 0.083 |
| Sex | ||||||
| Male | n=1157 | n=931 | n=814 | n=1001 | n=344 | |
| SBP, mean (SD) | 131.43 (22.04) | 132.14 (19.27) | 129.67 (19.74) | 132.24 (18.04) | 129.31 (21.63) | 0.354* |
| DBP, mean (SD) | 75.85 (12.85) | 77.00 (11.96) | 76.34 (12.33) | 78.32 (11.86) | 76.55 (13.18) | 0.068* |
| Hypertension, n (%) | 474 (43.86) | 405 (43.32) | 292 (33.97) | 415 (45.36) | 143 (36.79) | 0.102 |
| Female | n=1536 | n=972 | n=921 | n=980 | n=403 | |
| SBP, mean (SD) | 132.31 (23.43) | 132.52 (23.22) | 129.43 (22.01) | 130.45 (22.08) | 132.98 (24.96) | 0.128* |
| DBP, mean (SD) | 75.18 (12.02) | 76.44 (12.18) | 75.19 (11.87) | 75.63 (11.71) | 76.60 (13.20) | 0.072* |
| Hypertension, n (%) | 720 (46.64) | 390 (41.62) | 367 (40.24) | 396 (40.26) | 183 (46.48) | 0.167 |
| Age | ||||||
| ≥45 and <60 years | n=1244 | n=1073 | n=1080 | n=1112 | n=392 | |
| SBP, mean (SD) | 126.22 (19.62) | 130.59 (20.67) | 126.15 (19.08) | 128.02 (18.15) | 125.64 (20.03) | 0.073* |
| DBP, mean (SD) | 75.74 (12.40) | 78.27 (12.28) | 76.32 (12.18) | 78.53 (12.30) | 76.63 (13.30) | 0.021* |
| Hypertension, n (%) | 418 (33.95) | 373 (36.00) | 322 (28.46) | 365 (37.24) | 135 (33.69) | 0.292 |
| ≥60 years | n=1449 | n=830 | n=682 | n=869 | n=355 | |
| SBP, mean (SD) | 136.75 (24.14) | 134.82 (22.15) | 135.40 (22.64) | 136.32 (21.30) | 138.45 (25.72) | 0.718* |
| DBP, mean (SD) | 75.24 (12.38) | 74.49 (11.34) | 74.78 (11.93) | 75.09 (10.95) | 76.50 (12.93) | 0.245* |
| Hypertension, n (%) | 776 (55.06) | 422 (51.66) | 337 (51.98) | 446 (51.32) | 191 (52.48) | 0.703 |
*p Values of the categories of sleep duration in a linear regression model adjusted for age.
BP, blood pressure; CHARLS, China Health and Retirement Longitudinal Study; DBP, diastolic blood pressure; n, number of individuals analysed; SBP, systolic blood pressure.