Figure 1.
Relative risks for brain tumors in users vs never-users of cellular telephones in median year 2001, UK Million Women Study. Results are shown for daily use and ≥10 years use vs never-use only. Results for intermediate categories can be found in Supplementary Table 1 (available online). Relative risks are plotted as squares, with the area of each square inversely proportional to the variance of the log relative risk. Error bars represent the 95% confidence intervals. CI = confidence interval; RR = relative risk.
