Table 1

 Demographic characteristics of subjects by exposure category

Exposure category (mW/m2)p value
<0.10.1–0.5>0.5
p value from Kruskal–Wallis or χ2 test.
Age45 (SD 16)40 (SD 14)44 (SD 15)0.390
Females60%58%56%0.829
Years of residence19 (SD 16)17 (SD 13)20 (SD 16)0.403
Hours at home10 (SD 5)10 (SD 4)10 (SD 5)0.413
Employed56%60%61%0.689
Urban residence55%42%49%0.171
Education > 12 y42%38%40%0.784
Mobile phone use75%77%78%0.866