Table 3.
Risk of amyotrophic lateral sclerosis according to particulate matter (PM10) exposure in subjects with stable residence within five years of diagnosis using fixed cutpoints.
| Exposure | Cases/Controls | OR a | (95% CI) | OR b | (95% CI) |
|---|---|---|---|---|---|
| Annual median PM10 levels | |||||
| <5 µg/m3 | 22/45 | 1.00 | - | 1.00 | - |
| 5–10 µg/m3 | 16/28 | 1.17 | (0.53–2.60) | 1.02 | (0.43–2.42) |
| 10–20 µg/m3 | 4/6 | 1.36 | (0.35–5.33) | 1.35 | (0.34–5.43) |
| ≥20 µg/m3 | 1/1 | 2.05 | (0.12–34.26) | 1.16 | (0.07–20.11) |
| Annual maximum PM10 levels | |||||
| <10 µg/m3 | 3/8 | 1.00 | - | 1.00 | - |
| 10–20 µg/m3 | 2/4 | 1.33 | (0.15–11.50) | 2.19 | (0.23–20.91) |
| 20–50 µg/m3 | 24/40 | 1.60 | (0.39–6.62) | 1.64 | (0.37–7.27) |
| ≥50 µg/m3 | 14/28 | 1.33 | (0.231–5.82) | 1.53 | (0.32–7.23) |
a: Crude model; b: Model adjusted for sex and age. OR: odds ratio; CI: confidence interval.