Table 2:
Association between long-term ozone exposure and risk of cognitive impairment.
| Ozone (O3) exposurea | Observations | Participants | Cases | HR (95% CI) |
|---|---|---|---|---|
| Final model (fully-adjusted)b | ||||
| Continuous (per 10 ug/m3 increase in O3) | 63412 | 9327 | 2459 | 1.104 (1.041-1.172) |
| O3 categorized by quartiles | ||||
| 72.2 - 85.3 μg/m3 | 15853 | 3454 | 586 | 1 [Reference] |
| 85.3 - 92.4 μg/m3 | 15853 | 4399 | 693 | 1.182 (1.052-1.328) |
| 92.4 - 97.6 μg/m3 | 15853 | 4766 | 579 | 1.178 (1.034-1.341) |
| 97.6 - 112.4 μg/m3 | 15853 | 3757 | 601 | 1.217 (1.063-1.393) |
Abbreviation: HR, hazard ratio; CI, confidence interval.
a
Annual exposure during the previous calendar year.
b
Final model (fully-adjusted model) was adjusted for age, sex, education (literacy status), geographic region, residence, marital status, financial support, economic status, smoking status, drinking status, regular exercise, social and leisure activity, personality, disability, PM2.5, and air temperature.