BioMed Research International / 2017 / Article / Tab 10

Review Article

Evaluation of Mobile Phone and Cordless Phone Use and Glioma Risk Using the Bradford Hill Viewpoints from 1965 on Association or Causation

Table 10

Biological Gradient. Numbers of cases (Ca), controls (Co), and odds ratio (OR) with 95% confidence interval (CI) for cumulative duration of calls (hours) in Coureau et al. [39].

Cumulative duration of calls (hours)Ca/CoOR (95% CI)

No use107/211(1.0)
<4324/630.83 (0.48–1.44)
43–11220/550.77 (0.42–1.41)
113–33828/581.07 (0.60–1.90)
339–89528/371.78 (0.98–3.24)
≥89624/222.89 (1.41–5.93)

value global test0.02

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