Table 4.
Number of subjects and odds ratio by ELF-EMF exposure metric for all gliomas, glioblastomas, and meningiomas
| All Glioma Cases
|
Glioblastoma
|
Meningioma Cases
|
||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Exposure Metric | Controls | n | OR (95% CI) | p-Value for Trend | n | OR (95% CI) | p-Value for Trend | n | OR (95% CI) | p-Value for Trend |
| Maximum exposed job (mG) | ||||||||||
| ≤1.5 | 159 | 107 | 46 | 39 | ||||||
| >1.5 to <3.0 | 425 | 246 | 0.8 (0.6–1.1) | 123 | 0.8 (0.5–1.2) | 104 | 1.0 (0.7–1.6) | |||
| ≥3.0 | 196 | 121 | 0.8 (0.6–1.1) | 0.19 | 62 | 0.8 (0.5–1.2) | 0.39 | 49 | 1.0 (0.6–1.8) | 0.79 |
| Duration >1.5 mG (years) | ||||||||||
| 0 | 159 | 107 | 46 | 39 | ||||||
| >0 to 15 | 457 | 250 | 0.8 (0.6–1.0) | 104 | 0.7 (0.5–1.1) | 113 | 1.0 (0.7–1.6) | |||
| >15 | 164 | 115 | 0.8 (0.6–1.2) | 0.32 | 81 | 0.9 (0.6–1.5) | 0.89 | 40 | 1.0 (0.6–1.7) | 0.77 |
| Lifetime average (mG) | ||||||||||
| ≤1.5 | 407 | 240 | 109 | 106 | ||||||
| >1.5 to <3.0 | 302 | 195 | 1.0 (0.8–1.3) | 101 | 1.2 (0.9–1.6) | 73 | 1.1 (0.8–1.5) | |||
| ≥3.0 | 71 | 39 | 0.9 (0.6–1.3) | 0.68 | 21 | 1.0 (0.6–1.7) | 0.60 | 13 | 0.7 (0.4–1.4) | 0.66 |
| Cumulative exposure >1.5 mG (mG-years) | ||||||||||
| 0 | 159 | 107 | 46 | 39 | ||||||
| >0 to 45 | 490 | 276 | 0.8 (0.6–1.1) | 123 | 0.7 (0.5–1.1) | 121 | 1.0 (0.7–1.6) | |||
| >45 | 131 | 91 | 0.8 (0.5–1.2) | 0.23 | 62 | 0.9 (0.6–1.5) | 0.78 | 32 | 1.0 (0.6–1.8) | 0.91 |
Odds ratios calculated using unconditional logistic regression with adjustment for matching factors of gender, age, and site. Trend test conducted using ordinal rankings for exposure categories.