Table 4.
Adjusted Association of Proximity to a Major Roadway, PM2.5 with Detectable CAC Progression, Change in CAC
| Detectable CAC Progression* | Associations with Change in CAC* |
|||||
|---|---|---|---|---|---|---|
| OR | 95% CI | Mean CAC change/year |
95% CI | |||
| <50 m | 0.92 | (0.66, | 1.29) | −3.6 | (−9.3, | 1.9) |
| 50 to <200 m | 0.78 | (0.56, | 1.08) | −2.0 | (−8.3, | 3.3) |
| 200 to <400 m | 0.90 | (0.65, | 1.25) | −1.1 | (−7.6, | 4.4) |
| 400 to <1,000 m | 1.00 | |||||
| Log Distance to Road† | 1.06 | (0.91, | 1.22) | 2.2 | (0.1, | 4.3) |
| 2003 PM2.5 (µg/m3)‡ | 1.02 | (0.91, | 1.14) | −0.8 | (−2.3, | 0.6) |
| 2003–2009 PM2.5 (µg/m3)§ |
1.06 | (0.93, | 1.20) | −0.8 | (−2.4, | 0.8) |
Adjusted for covariates described in the online-only Data Supplement. Percentile bootstrapped CIs (n=1,000 clustered bootstrap samples) for change in CAC analyses.
Scaled to the difference between 75th (416.9 m) vs 25th (57.5 m) percentile from a major road. Detectable CAC progression: 1,536 observations (647 detectable progression). Change in CAC: 4,564 observations (1,536 two CAC measurements).
Scaled to 2003 PM2.5 IQR (1.4 µg/m3). 2003 PM2.5 detectable CAC progression: 1,719 observations (711 detectable progression). 2003–2009 PM2.5 detectable CAC progression: 1,718 observations (711 detectable progression). 2003 PM2.5 change in CAC: 5,118 observations (1,719 two CAC measurements). 2003–2009 PM2.5 change in CAC: 5,116 observations (1,718 two CAC measurements).