中国8,9,10岁儿童甲状腺容积分布及其正常界限

Thyroid volume frequency distribution and normal limit of Chinese ch ildren aged 8～10 years

目的 描述 8,9,10岁儿童甲状腺容积的分布 ,划定正常、“生理性大”以及肿大的界限。方法 以全国 1999年 B超法检查 34 5 49例 8,9,10岁儿童甲状腺容积的数据为基础 ,利用累计频数法、聚类分析法作分组、分类分析、划分所求得目标界限并用实际数据作合理性检验。结果 全国儿童样本甲状腺容积的均数、中位数以及 95 %分位数依次为 3.5 9,3.45 ,5 .88ml。生理性大的范围是 5 .79～ 9.11ml,异常肿大的下限是 9.12 m l。结论 将本文提供的标准方法应用于实际数据 ,合理实用 ,效果良好 。

Objective To describe the frequency distribution of thyroid volume of children in age of 8,9 and 10 years and to discover some practical limits for the discrimination of a thyroid volume value into any one rank named as normal, physiologic enlargement or abnormal categories.Methods Based on data composed of 34 549 cases of thyroid volume in children aged 8, 9 and 10 years, we used the methods of cumulative frequencies and cluster analysis for the study of our data in detail.Results The limits of the thyroid volume distribution are normal range between 0.15~5.78 ml, physiologic enlargement range between 5.79~9.11 ml and abnormal enlargement range between 9.12~19.00 ml.Conclusions The limits presented by us are used in practical materials well and these limits are useful, even for the broad space of the all country, if it is accepted by people in the same occupation as ours.