Table 4.
HR and 95%CI for hypertension associated with the intensity of PA stratified by long-term exposure of PM2.5.
| Average PA intensity (MET) |
ptrend | |||
|---|---|---|---|---|
| Light (1.6–<3.0) | Moderate (3.0–<6.0) | Vigorous (≥6.0) | ||
| Low PM2.5 (<59.8 μg/m3) | ||||
| Cases number | 2503 | 2291 | 1403 | |
| Person-years | 71,973 | 77,185 | 44,905 | |
| HR (95%CI)a | 1.00 | 0.87 (0.80–0.94) | 0.80 (0.71–0.91) | <0.001 |
| High PM2.5 (≥59.8 μg/m3) | ||||
| Cases number | 2450 | 1992 | 1255 | |
| Person-years | 75,239 | 65,618 | 44,784 | |
| HR (95%CI) | 1.00 | 1.11 (1.02–1.20) | 1.17 (1.04–1.33) | 0.016 |
a
Cox proportional hazard model, stratified by cohort and adjusted for age, sex, education level, urbanicity, geographic region, temperature, smoking status, alcohol drinking, body mass index, systolic blood pressure, diabetes mellitus, total cholesterol, and PA volume in MET-h/day.
Abbreviations: 95%CI = 95% confidence interval; HR = hazard ratio; MET = metabolic equivalent; PA = physical activity; PM2.5 = fine particulate matter.