Relative risk estimates for time since first usea and by ipsilateral versus contralateral useb
Table 1. Mobile phone use and the risk of brain tumours and parotid gland tumours
| Study |
Exposure |
Regular Use
RR (95% CI)c |
Ipsilateral
RR (95% CI)c |
Contralateral
RR (95% CI)c |
Ratio
i/c d |
a years since first regular use (one call per week or more over a period of six months or longer) of ten years or more
b ipsilateral use: preferred side of the head during mobile phone use corresponds to the side of the head where the tumour is located; contralateral use: preferred side of the head during mobile phone use corresponds to the side of the head opposite to the tumour
c relative risk estimated by the odds ratio and 95% confidence interval
d ratio of the relative risk estimates for ipsilateral use by contralateral use
e defined as never being a regular user (never one call per week or more over a period of six months or longer) or becoming a regular user less than 1.5 years ago in Lahkola et al. (2007, 2008) or less than 1 year ago in Sadetzki et al. (2008)
|
| Lahkola et al. (2007): Glioma |
| |
Not exposede |
1.00 |
1.00 |
1.00 |
|
| |
1.5 – 4 years |
0.77 (0.65, 0.92) |
1.08 (0.88, 1.31) |
0.70 (0.57, 0.87) |
1.54 |
| |
5 – 9 years |
0.75 (0.62, 0.90) |
1.10 (0.89, 1.35) |
0.74 (0.59, 0.92) |
1.49 |
| |
10+ years |
0.95 (0.74, 1.23) |
1.39 (1.01, 1.92) |
0.98 (0.71, 1.37) |
1.42 |
| Lahkola et al. (2008): Meningioma |
| |
Not exposede |
1.00 |
1.00 |
1.00 |
|
| |
1.5 – 4 yearss |
0.72 (0.60, 0.86) |
0.77 (0.60, 0.99) |
0.62 (0.47, 0.80) |
1.24 |
| |
5 – 9 years |
0.78 (0.64, 0.96) |
0.78 (0.56, 1.04) |
0.78 (0.58, 1.05) |
1.00 |
| |
10+ years |
0.91 (0.67, 1.25) |
1.05 (0.67, 1.65) |
0.62 (0.38, 1.03) |
1.69 |
| Sadetzki et al. (2008): Parotid gland |
| |
Not exposede |
1.00 |
1.00 |
1.00 |
|
| |
1 – 4 years |
0.82 (0.61, 1.10) |
0.88 (0.63, 1.24) |
0.82 (0.56, 1.21) |
1.07 |
| |
5 – 9 years |
0.95 (0.70, 1.30) |
1.14 (0.79, 1.65) |
0.96 (0.63, 1.46) |
1.19 |
| |
10+ years |
0.86 (0.42, 1.77) |
1.60 (0.68, 3.72) |
0.58 (0.15, 2.32) |
2.76 |
Source: SCENIHR  Health Effects of Exposure to EMF (2009),
3.3.2 Cancer, p.18
|