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

Table 5

Specificity. Numbers of cases (Ca), controls (Co), and odds ratio (OR) with 95% confidence interval (CI) for glioma and all mobile phone use and in the temporal lobe for mobile phone use ≥ 1,640 h, in three different case-control studies [2, 38, 39].

	Interphone 2010		Coureau et al.; 2014		Hardell, Carlberg; 2015
All	1,666/1,894	0.81; (0.70–0.94)	142/270	1.24; (0.86–1.77)	945/2,148	1.31; (1.09–1.58)
Temporal lobe, ≥1,640 h	78/47	1.87; (1.09–3.22)	7/5	3.94; (0.81–19.08)	59/301	2.05; (1.36–3.10)

896 h.