14. 对流行病学研究中不确定性的各种来源，以及处理这些来源的方法进行了审查。新一代的流行病学研究已开始提供对剂量评估中的不确定性加以纠正的辐射风险估计数，对其他不确定性的纠正也在开始。在对进行多种比较（例如对许多不同类型癌症的比较）的研究作出解释时，有一个重要问题是：随着比较数量的增加，完全出于偶然而获得具有统计意义结果的概率也随之增加。
14. Numerous sources of uncertainty in epidemiological studies were considered, together with methods for dealing with them. A new generation of epidemiological studies has begun to provide estimates of radiation risks corrected for uncertainties in dose assessment and corrections for other uncertainties are beginning to be made. An important issue when interpreting studies that make multiple comparisons (for example, for many different types of cancer) is that the probability of obtaining a statistically significant result purely by chance increases with the number of comparisons.