Table 14.
Analogy. Odds ratio (OR) and 95% confidence interval (CI) for glioblastoma multiforme for occupational exposure to ELF-EMF in time windows; 1–14 years and 15+ years before diagnosis. Unconditional logistic regression, adjusted for age at diagnosis, gender, socioeconomic index (SEI), and year of diagnosis. Exposure the year before diagnosis was excluded (“1-year lag”). Numbers of exposed cases (Ca) and controls (Co) are given [66].
| Cumulative exposure (µT-years) | Glioblastoma multiforme (n = 687) | ||
|---|---|---|---|
| Ca/Co | OR | 95% CI | |
| 1–14 years' time window | |||
| <0.91 | 106/770 | 1.00 | — |
| 0.91–<1.42 | 138/872 | 1.28 | 0.96–1.70 |
| 1.42–<1.82 | 187/778 | 1.79 | 1.36–2.35 |
| 1.82–<2.75 | 129/537 | 1.81 | 1.35–2.43 |
| 2.75+ | 89/329 | 1.88 | 1.35–2.62 |
| p, linear trend | <0.001 | ||
| 15+ years' time window | |||
| <1.44 | 119/782 | 1.00 | — |
| 1.44–<2.55 | 154/777 | 1.05 | 0.80–1.39 |
| 2.55–<4.17 | 173/787 | 0.99 | 0.74–1.32 |
| 4.17–<6.59 | 126/471 | 0.93 | 0.66–1.30 |
| 6.59+ | 88/313 | 0.91 | 0.62–1.32 |
| p, linear trend | 0.44 | ||