Prokopec M, Pfeiferová K, Josífko M
National Institute of Public Health, Prague, Czech Republic.
Cent Eur J Public Health. 1997 Dec;5(4):155-9.
Ossification of the sesamoid bone of the first finger was studied in left hand-and-wrist X-rays of 296 Czech boys and 272 girls 9 to 15 years old using data collected between 1962 and 1966. The logit and the YES or NO methods were used in treating the data. A sesamoid bone, clearly visible to the naked eye, was considered as positive and when it was not yet visible, as negative. The sesamoid bone was developed in 50 per cent of boys at the age of 13.6 years and in 50 per cent of girls at the age of 11.2 years. This stage preceded the age at onset of menarche in Czech girls by 1.9 years. Boys showed a greater variability (SD = 1.4) than girls (SD = 0.8). Both sexes with clearly visible (ossified) sesamoid bones in their first fingers showed to be, on the average, taller and heavier in comparison with the Czech standard and with those boys and girls of corresponding ages without the sesamoid bone. In contrast to the still continuing secular trend in stature in Czech youths, the age of menarche remained in the last cca 30 years unchanged. In view of the close link between bone age and onset of menarche which remained unchanged for the past 30 years, we may consider our finding as still applicable to present-day adolescents.
利用1962年至1966年间收集的数据，对296名9至15岁捷克男孩和272名同龄女孩的左手腕X线片进行研究，观察第一指籽骨的骨化情况。采用logit法和“是”或“否”法处理数据。肉眼清晰可见的籽骨视为阳性，不可见则视为阴性。籽骨在男孩13.6岁时出现率达50%，女孩在11.2岁时出现率达50%。这一阶段比捷克女孩月经初潮年龄提前1.9年。男孩的变异性（标准差=1.4）大于女孩（标准差=0.8）。与捷克标准以及同龄无籽骨的男孩和女孩相比，第一指有清晰可见（已骨化）籽骨的男女平均身高更高、体重更重。与捷克青少年身高仍在持续增长的长期趋势不同，月经初潮年龄在过去约30年中保持不变。鉴于骨龄与月经初潮的密切关联在过去30年中保持不变，我们可以认为我们的研究结果仍适用于当今的青少年。
