Vercauteren M, Susanne C
Anthropol Anz. 1984 Sep;42(3):211-7.
In Belgium, as in most industrialized countries, studies about menarcheal age have shown an earlier physical and sexual maturation. In this paper we will consider the secular trend in menarcheal age over the last twenty years in Brussels. The results concerning menstruation have been obtained in 1980-1982 from 1048 Belgian girls aged between 9 and 17. These girls have very varied socio-economic backgrounds, representative of the diversity of social origin in the Belgian population of Brussels (city and suburbs). Our data were collected using the status quo-method and compared with Jeurissen's (menarcheal age in Belgium between 1915 and 1959). Percentiles and probits were used. The lower limit, where 10% of the girls have had their menarches remains more or less constant. Between 1915 and 1959, Jeurissen noted the tendency of the median menarcheal age toward earlier sexual maturation from 14 years 4 months to 13.0. But, for the first time in Belgium, it seems that the median age is stabilized at 13.0 years. However, the higher limit (age, where 90% have had their menarches) is attained at a lower age: 15.0 for girls born between 1950-1954 and 14.0 in our sample. In conclusion, it seems that better conditions of life cause an evolution in the cases of late menarches but have no more repercussions on the median menarcheal age in this Belgian group.
在比利时，与大多数工业化国家一样，关于初潮年龄的研究表明身体和性成熟有所提前。在本文中，我们将探讨布鲁塞尔过去二十年中初潮年龄的长期趋势。关于月经的研究结果是在1980 - 1982年从1048名年龄在9至17岁的比利时女孩中获得的。这些女孩的社会经济背景差异很大，代表了布鲁塞尔比利时人口（城市和郊区）社会出身的多样性。我们的数据是使用现状方法收集的，并与朱里森（1915年至1959年比利时的初潮年龄）的数据进行了比较。使用了百分位数和概率单位。初潮年龄下限（10%的女孩已来初潮的年龄）基本保持不变。1915年至1959年期间，朱里森注意到初潮年龄中位数有向性成熟提前的趋势，从14岁4个月降至13.0岁。但是，在比利时首次出现的情况是，中位数年龄似乎稳定在13.0岁。然而，上限（90%的女孩已来初潮的年龄）在较低年龄达到：1950 - 1954年出生的女孩为15.0岁，而我们样本中的女孩为14.0岁。总之，似乎生活条件的改善使初潮较晚的情况发生了变化，但对这个比利时群体的初潮年龄中位数不再有影响。
