青春突增期少年掌骨发育的城乡对比研究

目的　探讨生长突增期少年的掌骨发育状况 ,对比掌骨发育水平是否存在城乡差异。方法　在城市和乡村两个观察点选择 5 6 0名中小学生 (男生 12 15岁、女生 10 13岁 ) ,各性别年龄组 35人。被检者均拍左手腕部X线片 ,测量X线片的掌骨长径与横径 ,计算掌骨指数。结果　青春期城乡男女少年掌骨长度均有大幅度增长 ,男生增值为 6 .2 6～ 9.31mm ,女生增值为 5 .2 8～ 9.12mm ;男女各年龄组掌骨长度均值皆城市大于乡村 ,且男 14和 15岁 (15岁Ⅰ、Ⅴ掌骨除外 )、女 12岁掌骨长度均值的差异具有显著性 ,77.5 %的掌骨横径均值为乡村高于城市 ;除女 13岁组外 ,掌骨指数均值城市高于乡村 ,差异有显著性 ;城市比乡村少年的掌骨发育高峰年龄提前 1岁。结论　青春突增期少年掌骨发育迅速 ,且存在较明显的城乡差异

The comparative study on maturation of metacarpal bone in puberty children during their growth spurt period between urban and rural areas

OBJECTIVES: To study maturation of the metacarpal bone in puberty children during their growth spurt period and its difference between urban and rural areas. METHODS: Totally, 560 pupils/students were selected from primary and secondary schools in urban and rural areas each, with 35 children in each gender and age group, ranging 12 - 15 years of age for boys and 10 - 13 for girls. An X-ray film of left hand-wrist site was taken for each of them. Length and width of the metacarpal bone were measured and the metacarpal index was calculated. RESULTS: Increment of length of the metacarpal bone was great in puberty children both in urban and rural areas, (6.26 - 9.31) mm in boys and (5.28 - 9.12) mm in girls. Mean length of the metacarpal bone was longer in children of urban areas than that of rural ones, regardless of their age and gender. There was significant difference in mean length of the metacarpal bone between boys aged 14 - 15 years and girls aged 12. Mean width of the metacarpal bone in most children was wider in rural areas than that in urban ones. Mean metacarpal index in children was higher in urban areas than that in rural ones, with very statistical significance, except for girls of 13 year age group. The peak age of metacarpal maturation was 1 year earlier in urban areas than in rural ones. CONCLUSIONS: Maturation of the metacarpal bone was rapid during puberty growth spurt period, with relatively significant difference in urban and rural ares.