The Determination of Secular Trend

Secular Trend in Portugal

This study of secular trend in Portugal has shown that a positive increment in height occurred in Portuguese 18year-old males between 1904 and 2000, and a secular trend in the age at menarche, towards an earliest age, also took place. Mean height increased 8.93 cm, from 1904 to 2000, when reached 172,13 cm. Besides that, in 2000, statistically significant differences (p ≤ 0.001) among the distr...

Growth variation, final height and secular trend

Growth and body height have always been interesting topics in the public opinion. Particularly the stupendous increase of some 15 to 19 cm in final adult height during the last 150 years in most European countries (the “secular trend”), the concomitant changes in body and head proportions, the tendency towards early onset of sexual maturation, the changes in the age when final height is being r...

determination of maximal singularity free zones in the workspace of parallel manipulator

due to the limiting workspace of parallel manipulator and regarding to finding the trajectory planning of singularity free at workspace is difficult, so finding a best solution that can develop a technique to determine the singularity-free zones in the workspace of parallel manipulators is highly important. in this thesis a simple and new technique are presented to determine the maximal singula...

Evidence for a secular trend in age of menarche.

Prevalence and secular trend of congenital anomalies in Glasgow, UK.

AIM To describe the epidemiology of congenital anomalies in Glasgow with special reference to secular trends. METHODS The prevalence of congenital anomalies was determined retrospectively in 233 777 births using the Glasgow Register of Congenital Anomalies for the period 1980-97. RESULTS The total prevalence of congenital anomalies was 324 per 10 000 births, declining by just over a third f...