Farid-Coupal N, Contreras M L, Castellano H M
Ann Hum Biol. 1981 May-Jun;8(3):283-8. doi: 10.1080/03014468100005051.
A study of the age at menarche was conducted in the state of Carabobo as part of Project Venezuela, a National Human Growth, Nutrition and Family Survey. The study was performed during 1978 on a cross-sectional random stratified sample which included 955 girls between the ages of 9 and 20 years. Data were collected using the status quo method. The median age at menarche was estimated by logits at 12.68 0.08 for all socio-economic groups. Sexual maturation occurred earlier in girls from stratum III and later in those from strata IV and V; 12.34 0.11, 12.59 0.11, and 12.86 0.12, respectively. Small sample size did not permit comparisons with strata I and II girls. The results indicate a secular trend in the age of menarche when compared with previous Venezuelan studies. Median age for all Carabobo girls is comparable and often slightly lower than recent data from European and American studies.
作为“委内瑞拉项目”（一项全国性人类生长、营养与家庭调查）的一部分，在卡拉沃沃州开展了一项初潮年龄研究。该研究于1978年进行，采用横断面随机分层抽样，样本包括955名9至20岁的女孩。数据收集采用现状调查法。所有社会经济群体的初潮年龄中位数经对数单位估计为12.68±0.08岁。第三阶层女孩的性成熟较早，第四和第五阶层女孩的性成熟较晚，分别为12.34±0.11岁、12.59±0.11岁和12.86±0.12岁。样本量较小，无法与第一和第二阶层女孩进行比较。与委内瑞拉以往的研究相比，结果显示初潮年龄存在长期趋势。卡拉沃沃州所有女孩的年龄中位数具有可比性，且通常略低于欧美近期研究的数据。
