Li Chung-Yi, Lin Ruey S, Sung Fung-Chang
Department of Public Health, College of Medicine, Fu Jen Catholic University, Hsinchuang, Taipei Hsien, Taiwan.
Bioelectromagnetics. 2003 Apr;24(3):218-21. doi: 10.1002/bem.10095.
To explore whether the age at cancer diagnosis was associated with residential exposure to magnetic field, we compared average ages at diagnosis for cases of leukemia, brain tumor, or female breast cancer with elevated exposure (magnetic flux density >or= 0.2 microT, or residential distance from major power lines <or= 100 m) to average ages at diagnosis for cancer cases with same diagnoses but with a background exposure (< 0.2 microT or > 100 m from major power lines). Comparing with brain tumor cases with background magnetic field exposure (n = 506), brain tumor cases with elevated exposure (n = 71) were 6 years older on average at diagnosis (P = 0.01). The difference was greater for males (45.2 vs. 52.1 years, P = 0.01) than for females (44.3 vs. 48.2 years, P = 0.27). No such phenomena at a significant level was observed for leukemia, female breast cancer, or a random sample of general population. We noted an association between magnetic field exposure and a greater mean age at diagnosis for brain tumors. Whether or not these phenomena suggest a delayed occurrence of brain tumors following a higher than background residential magnetic field exposure deserves further investigation.
为了探究癌症诊断时的年龄是否与居住环境中的磁场暴露有关，我们比较了白血病、脑肿瘤或女性乳腺癌病例中暴露水平升高（磁通密度≥0.2微特斯拉，或与主要输电线的居住距离≤100米）的诊断平均年龄与相同诊断但背景暴露（<0.2微特斯拉或距主要输电线>100米）的癌症病例的诊断平均年龄。与背景磁场暴露的脑肿瘤病例（n = 506）相比，暴露水平升高的脑肿瘤病例（n = 71）诊断时平均年龄大6岁（P = 0.01）。男性的差异（45.2岁对52.1岁，P = 0.01）比女性（44.3岁对48.2岁，P = 0.27）更大。在白血病、女性乳腺癌或一般人群随机样本中未观察到显著水平的此类现象。我们注意到磁场暴露与脑肿瘤诊断时更大的平均年龄之间存在关联。这些现象是否表明高于背景水平的居住磁场暴露后脑肿瘤的发生延迟，值得进一步研究。
