摘要
用计算机方法对B超测量甲状腺容积的适宜样本含量进行了估算。中位数适合表示甲状腺容积频数分布的集中趋势。对于300名儿童的总体,只需随机抽取50名即可。对于均衡或非均衡扩大总体,样本含量有所增加,但无倍数关系。
In this paper,the authors estimated the optimal sample size of thyroid volume measured with Bultrasound by applying the computer simulation technique.The results indicated the median was more suitable than the mean for showing the central tendency of the thyroid volume.The 50 children′s randomized samples from the population of 300 children aged ten years were of the representative.The sample size increased for the balanced or the nonbalanced expansion population.
出处
《中国地方病学杂志》
CAS
CSCD
1998年第2期84-85,共2页
Chinese Jouranl of Endemiology