BioMed Research International / 2018 / Article / Tab 2

Research Article

Case-Control Study on Occupational Exposure to Extremely Low-Frequency Electromagnetic Fields and the Association with Meningioma

Table 2

Odds ratio (OR) and 95% confidence interval (CI) for meningioma (,592) for occupational exposure to ELF-EMF in time windows, 1–14 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”).

Cumulative exposure (µT-years)Meningioma (,592)
Ca/CoOR95% CI

1–14 years
 <0.91-
 0.91–<1.420.8–1.1
 1.42–<1.820.8–1.2
 1.82–<2.750.8–1.3
 2.75+0.8–1.3
p, linear trend0.71
15+ years
 <1.44-
 1.44–<2.550.8–1.1
 2.55–<4.170.6–0.95
 4.17–<6.590.7–1.1
 6.59+0.6–1.1
p, linear trend0.28

Cut points at 25th, 50th, 75th, and 90th percentile for controls in each time window.

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