White S B, Alexander B V, Rodman N F
Research Triangle Institute, Research Triangle Park, NC 27709-2194.
Health Phys. 1994 Jan;66(1):55-62. doi: 10.1097/00004032-199401000-00008.
Long-term and short-term measurements of indoor 222Rn from 480 houses located in eleven states were used to study the relationship between the annual living area average (ALAA) and 1) a single 2 d measurement and 2) the mean of multiple 2 d measurements (taken in different seasons). Of particular interest is the issue of using a short-term measurement(s) to predict the ALAA in a given house. The results indicate that with 95% confidence (approximately): 1) a single 2 d measurement gives an interval estimate of the true ALAA that is within a factor of 2.5 of the predicted ALAA; and 2) a mean of two 2 d measurements (taken in different seasons) gives an interval estimate that is within a factor of 2.2 of the predicted ALAA. If a more precise estimate of the ALAA is needed, then an alternative procedure to using 2 d measurements should be employed (e.g., measure the annual concentration directly).
对位于11个州的480所房屋进行了室内222Rn的长期和短期测量，以研究年居住面积平均值（ALAA）与1）单次2天测量值和2）多次2天测量值（在不同季节进行）的平均值之间的关系。特别令人感兴趣的是使用短期测量来预测给定房屋中ALAA的问题。结果表明，在95%的置信度下（大致）：1）单次2天测量给出的真实ALAA区间估计值在预测ALAA的2.5倍范围内；2）两次2天测量值（在不同季节进行）的平均值给出的区间估计值在预测ALAA的2.2倍范围内。如果需要对ALAA进行更精确的估计，那么应该采用替代2天测量的程序（例如，直接测量年浓度）。
