نتایج جستجو برای: secular demographic trend
تعداد نتایج: 234340 فیلتر نتایج به سال:
Growth parameters were surveyed in a sample of 296 Italian children, 6-9 years old, from Cento (Ferrara, Emilia-Romagna). The comparison with children from the same town measured in 1974-75 show changes in some parameters, suggesting an ongoing secular trend. To better understand the observed weight increase and the sex difference, we also evaluated body composition and motricity. The analysis ...
Menarcheal age is a key indicator of female maturity and development. Studies in many countries have reported a downward secular trend in age of menarche over the past century. This study presents data gained using the 'status quo' method and interval regression to estimate median menarcheal age of girls in a rural Gambian community. Cross-sectional studies carried out in 1989, 2000 and 2008 re...
BACKGROUND With industrial and econom ic development in recent decades in South China, cancer incidence may have changed due to the changing lifestyle and environment. However, the trends of lung cancer and the roles of smoking and other environmental risk factors in the development of lung cancer in rural areas of South China remain unclear. The purpose of this study was to explore the lung ca...
OBJECTIVE To assess the secular trend in length of hospital stay for healthy newborns with birth weight >or= 2,500 g in a large maternity hospital of Campinas, state of São Paulo, Brazil. METHODS In this descriptive, analytical, retrospective study, data were collected from 5,001 live births from 1951 to 2000. Studied variables were length of hospital stay, birth weight, maternal age, type of...
An analysis of recent observations (2004–2013) made by the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) instrument indicate that total carbon (COx=CO+CO2) has been increasing rapidly in the lower thermosphere, above 10 3 hPa (90 km). The estimated trend (~9% per decade) is about a factor of 2 larger than the rate of increase that can be ascribed to anthropogenic emi...
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