※初めにNatural Speedを視聴し、 聞き取れない場合はSlow Speedを視聴して下さい。 訳文を読んでから英文に戻ると理解が深まります。
Mobile phones and brain cancer.
Column 4 - Conclusions
The results of the international case control study found no significant link between mobile phone use and brain cancer. In fact, it found that the risk was lower in those who had regular mobile phone use in the past one year or more. However, as mentioned before, the case control study only highlights a potential association between the two rather than a direct link.
In order to get more conclusive results regarding any possible link, a prospective study could be used. This involves scientists following a population over time and waiting for cases to develop. This, however, could be extremely time consuming since brain tumours are rare and take a very long time to develop. In addition, to make the study statistically significant, a large number of participants would be necessary, making it even less viable.
Also, given the extreme unlikelihood of any significant relationship between the two (since the radiowave frequency from a mobile phone doesn’t actually break DNA strands), it would seem an expensive and time-consuming study with little chance of any real finding.
知っておきたい英単語
1.brain cancer 脳がん（脳の悪性腫瘍）
2.brain tumour 脳腫瘍（良性腫瘍も含む）
3.case control study 症例対象研究
4.as mention before 先述したように
5.potential association 潜在的な関係
6.prospective study 計画的研究
7.statistically 統計的に
8.participant 参加者（ここでは治験者）
9.viable 実行可能な
10.extreme 極端な
