Growth patterns of Labrador Inuit youth: II. Skeletal age.

Arctic medical research Pub Date : 1994-10-01
M P Zammit, V Kalra, S Nelson, B H Broadbent, M G Hans
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Abstract

Few studies have been conducted on skeletal maturity of circumpolar populations despite its importance as background knowledge to orthopedic and orthodontic procedures or for other medical problems involving endocrine disturbances. The purpose of this study was to compare skeletal age with chronological age of Labrador Inuit youth aged between 5-18 years and to compare these results with data from a national survey of United States youth. The sample included 32% (n = 100) of the Inuit youth living in Nain, Labrador, Canada (Male = 41, female = 59). Hand wrist radiographs, collected during a field study in 1991, were used to estimate bone age using the Greulich and Pyle bone specific method. The mean relative Inuit skeletal ages increased almost consistently with chronological age but showed considerable individual variation as shown by the 95% confidence intervals. The pattern of growth of skeletal vs chronological age was similar to the National Center for Health Statistics data but the tempo was slower. The Z-scores for mean male relative bone ages ranged from -0.7 to -1.9 and for females from -0.6 to -1.4. The results indicated that Inuit males started to reach adult skeletal maturity levels by the chronological age of 17 years 9 months, and Inuit females by 15 years 8 months. Generally, Inuit skeletal ages were delayed by 10-24 months behind the reference atlas skeletal ages and 9-22 months behind the Inuit chronological ages.(ABSTRACT TRUNCATED AT 250 WORDS)

拉布拉多因纽特青年的成长模式:2。骨骼年龄。
尽管骨骼成熟度对于骨科和正畸手术或其他涉及内分泌紊乱的医学问题具有重要的背景知识,但很少有研究对环极人群的骨骼成熟度进行了研究。本研究的目的是比较5-18岁拉布拉多因纽特青年的骨骼年龄和实足年龄,并将这些结果与美国全国青年调查的数据进行比较。样本包括32% (n = 100)居住在加拿大拉布拉多省纳因的因纽特青年(男性41人,女性59人)。在1991年的一次实地研究中收集的手腕部x光片,使用Greulich和Pyle骨特异性方法来估计骨年龄。因纽特人的平均相对骨骼年龄几乎与实足年龄一致地增加,但95%的置信区间显示出相当大的个体差异。骨骼年龄与实足年龄的增长模式与国家卫生统计中心的数据相似,但速度较慢。男性平均相对骨龄的z分数范围为-0.7至-1.9,女性为-0.6至-1.4。结果表明,因纽特男性在17岁9个月时开始达到成人骨骼成熟水平,因纽特女性在15岁8个月时开始达到成人骨骼成熟水平。一般来说,因纽特人的骨骼年龄比参考地图集骨骼年龄晚10-24个月,比因纽特人的实足年龄晚9-22个月。(摘要删节250字)
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