Table 3.
Estimated change in CRVE in association with PM10 and BC. Estimates express the change (95% CI) in the retinal venular blood vessels associated with a 10-µg/m3 increase in PM10 or a 1-µg/m3 increase in BC.
| Exposure time (lags) | Model 1a | Model 2b |
|---|---|---|
| PM10 (for each 10-μg/m³ increase) | ||
| 2 hr | –0.62 (–1.28, 0.04) | –0.39 (–1.00, 0.22) |
| 4 hr | –0.77 (–1.48, –0.05)* | –0.49 (–1.15, 0.17) |
| 6 hr | –0.93 (–1.67, –0.17)* | –0.60 (–1.28, 0.09) |
| 24 hr | –0.86 (–1.42, –0.30)** | –0.60 (–1.26, 0.07) |
| 2 day | –1.03 (–1.88, –0.18)* | –0.84 (–1.61, –0.08)* |
| BC (for each 1-μg/m³ increase) | ||
| 2 hr | 0.46 (–0.65, 1.57) | 0.29 (–0.71, 1.31) |
| 4 hr | 0.52 (–0.68, 1.73) | 0.30 (–0.80, 1.40) |
| 6 hr | 0.47 (–0.87, 1.80) | 0.22 (–1.01, 1.44) |
| 24 hr | –1.18 (–3.11, 0.75) | –0.04 (–1.77, 1.70) |
| Both models include 84 persons: 25 had one measurement, 14 had 2 measurements, and 45 had 3 measurements. aAdjusted for sex, age, BMI, smoking habits, alcohol and coffee consumption 24 hr prior to examination, time of the day and day of the week, outdoor temperature, and barometric pressure. bIncludes model 1 covariates plus CRAE. *p < 0.05. **p < 0.01. | ||