Table 3.
Risk of incident RA in relation to residential proximity to traffic during 5 years before diagnosis [ORs (95% CIs)].
| Exposure | RA-ICD-9 | RA-prescription | RA-specialist | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Percent cases (n = 3,226) | Percent controls (n = 33,256) | OR (95% CI) | Percent cases (n = 2,686) | Percent controls (n = 26,857) | OR (95% CI) | Percent cases (n = 1,907) | Percent controls (n = 19,066) | OR (95% CI) | |
| Distance from highway | |||||||||
| > 150 m | 86.9 | 89.3 | 1.0 (referent) | 87.0 | 89.4 | 1.0 (referent) | 87.8 | 89.0 | 1.0 (referent) |
| > 50–150 m | 9.1 | 7.8 | 1.17 (1.03, 1.33) | 9.1 | 7.6 | 1.24 (1.08, 1.43) | 8.3 | 8.1 | 1.07 (0.90, 1.27) |
| ≤ 50 m | 3.9 | 2.8 | 1.39 (1.16, 1.68) | 4.0 | 3.0 | 1.37 (1.11, 1.68) | 3.9 | 2.9 | 1.37 (1.07, 1.76) |
| Distance from major road | |||||||||
| > 150 m | 59.7 | 61.2 | 1.0 (referent) | 60.6 | 61.5 | 1.0 (referent) | 61.9 | 61.7 | 1.0 (referent) |
| > 50–150 m | 26.8 | 25.9 | 1.05 (0.97, 1.14) | 25.7 | 25.5 | 1.02 (0.93, 1.12) | 26.0 | 25.4 | 0.94 (0.81, 1.09) |
| ≤ 50 m | 13.5 | 12.8 | 1.07 (0.96, 1.19) | 13.7 | 13.0 | 1.07 (0.95, 1.20) | 12.1 | 12.9 | 1.02 (0.92, 1.14) |
| Members of the study population who lived ≤ 150 m from a highway/major road during the 5-year exposure period were categorized according to proximity at which they lived the longest. ORs were adjusted for age, sex, and neighborhood SES. | |||||||||