| the age at menarche in carabobo, venezuela with a note on the secular trend. | 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 ... | 1981 | 7259105 |