Davis P J, Hägg U
Department of Children's Dentistry and Orthodontics, Faculty of Dentistry, University of Hong Kong.
Swed Dent J. 1994;18(3):113-6.
The accuracy and precision of a method devised for estimation of chronological age based on tooth formation (Demirjian et al 1973) using its latest standards (Demirjian 1982, 1986) were investigated using 204 panelipses obtained from a randomised sample of 5-7 year old Chinese children. The precision was found to be high but the accuracy was low. The mean difference between dental age and true age of the Chinese children was 11 and 7 months in boys and girls, respectively. The 95 per cent confidence interval was about +/- 15 months in both sexes. The results indicate that Demirjian's method cannot be used to accurately estimate chronologic age of Chinese children of this age group.
基于牙齿形成情况来估计实足年龄的一种方法（Demirjian等人，1973年），采用其最新标准（Demirjian，1982年、1986年），通过从5至7岁中国儿童的随机样本中获取的204颗牙齿进行了研究。结果发现该方法的精密度较高，但准确度较低。中国儿童的牙齿年龄与实际年龄之间的平均差异，男孩为11个月，女孩为7个月。两性的95%置信区间均约为±15个月。结果表明，Demirjian方法不能用于准确估计该年龄组中国儿童的实足年龄。
