Table 5.
Risk of amyotrophic lateral sclerosis according to particulate matter (PM10) exposure in subjects with stable residence within five years of diagnosis using tertile distribution.
| Exposure | Median Value (µg/m3) | Cases/ Controls |
OR a | (95% CI) | OR b | (95% CI) |
|---|---|---|---|---|---|---|
| Annual median PM10 levels |
||||||
| T1 < 3.0 µg/m3 | 1.4 | 12/26 | 1.00 | - | 1.00 | - |
| T2 ≥ 3.0–<6.6 µg/m3 | 4.2 | 15/27 | 1.20 | (0.47–3.05) | 0.84 | (0.31–2.29) |
| T3 ≥ 6.6 µg/m3 | 8.4 | 16/27 | 1.28 | (0.51–3.23) | 1.07 | (0.41–2.83) |
| Annual maximum PM10 levels | ||||||
| T1 < 30.0 µg/m3 | 22.2 | 14/26 | 1.00 | - | 1.00 | - |
| T2 ≥ 30.0–<50.4 µg/m3 | 38.2 | 15/27 | 1.03 | (0.42–2.55) | 1.07 | (0.41–2.79) |
| T3 ≥ 50.4 µg/m3 | 59.5 | 14/27 | 0.96 | (0.39–2.41) | 1.04 | (0.40–2.73) |
a: Crude model; b: Model adjusted for sex and age. OR: odds ratio; CI: confidence interval.