手腕部与膝部骨龄之间的差异

本文分别用Fels和RWT法评定了4902对2—17岁儿童青少年的手腕部和膝部骨龄。男女各年龄组骨龄的平均绝对差值为0.34—0.87岁,标准差为0.31—0.68岁。8—11岁前,这两个值往往随年龄增加;14岁前,男性一般大于女性。最大差值范围为1.45—2.99岁,其年龄变化往往不规律,但11岁前(男)和9岁前(女)常常增加。手腕部和膝部骨龄之间所存在的较大的绝对差值不能完全用观察误差加以解释。两部位的骨龄不能互相替代。所以,用骨龄预测成人身高和确定干骺固定术的时间,至少在5％的儿童中明显地受到骨龄部位的影响。

DIFFERENCES BETWEEN THE HAND-WRIST AND THE KNEE IN ASSIGNED SKELETAL AGES

Skeletal ages were assessed for 4902 pairs of hand-wrist and knee radiographs of children aged 2 to 17 years. The FELS method was used to assess the hand-wrist and the RWT method was used to assess the knee. The mean absolute differences, within ageand sex-specific groups, ranged from 0.34 to 0.87 years. The SD of the differences ranged from 0.31 to 0.68 years and, like the means, tended to increase with age until about 8-11 years. The means and SD were generally larger for the boys than for the girls except after 14 years. Within age- and sex-specific groups, the maximum differences were from 1.45 to 2.99 years. These maximum differences changed irregularly with age but tended to increase until 11 years in the boys and 9 years in the girls. These large absolute differences between the skeletal ages of the hand-wrist and the knee cannot be explained completely by the effects of observer errors. These skeletal ages are not interchangeable; in at least 5% of children, the choice of the area for skeletal age assessment will markly influence the evaluation of individuals, the prediction of adult stature and the selection of ages for epiphyseadeses.