Incidence density and HR of hypertension according to change in ST
| Change in ST | Hypertension (n=1,681) |
Person-year | HR (95% CI) | ||
|---|---|---|---|---|---|
| Incidence density |
Model 1 (n=1,681) | Model 2 (n=1,681) | |||
| Total | |||||
| Consistently non-ST | 278 | 7,032.10 | 39.53 (35.14−44.46) | 1.00 (reference) | 1.00 (reference) |
| Formerly ST | 71 | 1,961.02 | 36.20 (28.69−45.68) | 0.80 (0.61−1.04) | 0.81 (0.62−1.05) |
| Newly ST | 72 | 1,401.96 | 51.35 (40.76−64.70) | 1.36 |
1.37 |
| Consistently ST | 37 | 947.94 | 39.03 (28.28−53.87) | 0.97 (0.68−1.37) | 0.98 (0.69−1.39) |
| Weekday | |||||
| Consistently non-ST | 275 | 6,948.80 | 39.57 (35.16−44.54) | 1.00 (reference) | 1.00 (reference) |
| Formerly ST | 75 | 2,034.30 | 36.86 (29.40−46.23) | 0.81 (0.63−1.05) | 0.82 (0.63−1.06) |
| Newly ST | 69 | 1,343.50 | 51.35 (40.56−65.02) | 1.34 |
1.34 |
| Consistently ST | 39 | 1,016.43 | 38.36 (28.03−52.51) | 0.94 (0.67−1.32) | 0.95 (0.68−1.35) |
| Weekend | |||||
| Consistently non-ST | 295 | 7,366.15 | 40.04 (35.72−44.88) | 1.00 (reference) | 1.00 (reference) |
| Formerly ST | 67 | 1,813.50 | 36.94 (29.07−46.94) | 0.79 (0.60−1.03) | 0.79 (0.60−1.04) |
| Newly ST | 68 | 1,446.49 | 47.01 (37.06−59.62) | 1.17 (0.90−1.53) | 1.18 (0.90−1.54) |
| Consistently ST | 28 | 716.88 | 39.05 (26.96−56.56) | 0.92 (0.62−1.37) | 0.93 (0.63−1.39) |
| Total | 458 | 11,343.04 | 40.37 | - | - |
HR: hazard ratio, ST: sitting time, CI: confidence interval.
Multivariable model 1 adjusted age, sex, income level, sleep duration, alcohol consumption, current smoking, high sensitivity C-reactive protein, body mass index, estimated glomerular filtration rate, resting heart rate, prevalence of diabetes mellitus, prevalence of hyperlipidemia. Model 2 adjusted model 1 plus change in total physical activity.
Consistently non-ST, <7 hr/day in 2011−2012 and 2013−2014; Formerly ST, ≥7 hr/day in 2011−2012 and <7 hr/day in 2013−2014; Newly ST, <7 hr/day in 2011−2012 and ≥7 hr/day in 2013−2014; Consistently ST, ≥7 hr/day in 2011−2012 and 2013−2014.
*Incidence density=case/person-year×1,000. †p<0.05.
