Table 6.
Risk of amyotrophic lateral sclerosis according to particulate matter (PM10) exposure comparing the highest and the three lowest quartiles lumped together.
| Exposure | Cases/ Controls |
OR a | (95% CI) | OR b | (95% CI) |
|---|---|---|---|---|---|
| Annual median PM10 levels | |||||
| Q1–Q3 < 7.3 µg/m3 | 38/60 | 1.00 | - | 1.00 | - |
| Q4 ≥ 7.3 µg/m3 | 14/20 | 1.11 | (0.50–2.45) | 1.13 | (0.50–2.55) |
| Annual maximum PM10 levels | |||||
| Q1–Q3 < 55.0 µg/m3 | 45/60 | 1.00 | - | 1.00 | - |
| Q4 ≥ 55.0 µg/m3 | 7/20 | 0.47 | (0.18–1.20) | 0.45 | (0.17–1.17) |
a: Crude model; b: Model adjusted for sex and age. OR: odds ratio; CI: confidence interval.