Table 6.
Specificity. Estimated elevation in brain tumour risk (α) and 95% confidence interval (CI) in shortest distance group 0–55 mm compared to reference category ≥ 115.01 mm from preferred ear to tumour center. Based on Grell et al. [44].
| Covariate | α | 95% CI |
|---|---|---|
| Tumour size | ||
| ≤18 cm3 | 1.96 | 1.51–3.66 |
| >18 cm3 | 4.09 | 1.90–12.0 |
| Duration of phone use | ||
| <6 years | 2.02 | 1.31–4.28 |
| ≥6 years | 3.27 | 1.92–11.3 |
| Cumulative phone use | ||
| <200 hours | 1.57 | 1.29–3.36 |
| ≥200 hours | 4.06 | 2.03–11.6 |
| Cumulative number of calls | ||
| <4,000 | 1.55 | 1.25–3.42 |
| ≥4,000 | 3.56 | 2.05–9.88 |