نتایج جستجو برای: secular trend
تعداد نتایج: 129534 فیلتر نتایج به سال:
[1] A gap in the total solar irradiance (TSI) measurements between ACRIM-1 and ACRIM-2 led to the ongoing debate on the presence or not of a secular trend between the minima preceding cycles 22 (in 1986) and 23 (1996). It was recently proposed to use the SATIRE model of solar irradiance variations to bridge this gap. When doing this, it is important to use the appropriate SATIRE-based reconstru...
Considerable evidence suggests that malnutrition affects human performance, health and survival, including physical growth, morbidity, mortality, cognitive development, reproduction, physical work capacity and risks for several adult-onset chronic diseases. In recent decades, development agencies and governments have emphasized selective interventions to improve health and nutritional status, s...
Menarcheal age was estimated for 287 (188 Black; 99 White) urban South African girls born in Soweto-Johannesburg in 1990. The median menarcheal age for Blacks was 12.4 years (95% confidence interval (CI) 12.2, 12.6) and 12.5 years (95% CI 11.7, 13.3) for Whites. Data from six studies of menarcheal age, including the current study, were analyzed to examine the evidence for a secular trend betwee...
Postnatal growth is based on hereditary signals and environmental factors in a complex regulatory network. Each factor must be in an optimal state for normal growth of the child. Fetal conditions may also have consequences on postnatal height. Intrauterine growth retardation can be recovered postnatally, although postnatal growth remains depressed in about one-third of cases. After birth, the e...
Since the 19th century there have been clearly documented secular trends to increasing adult height in most European countries, with current rates of 10-30 mm/decade. Over the same period menarcheal age has also fallen steeply, but has now stabilized at approximately 13 years and may be rising again. Height trends tend to be greater in childhood than in adulthood due to the associated advance i...
OBJECTIVE To describe the HPV genotype distribution and to investigate the underlying secular trend in the relative contribution of HPV types 16-18 in invasive cervical cancer (ICC) over a period of 47 years (1958-2004) in South Korea. METHODS Paraffin embedded ICC samples were obtained from historical archives of two hospitals in Korea. HPV detection and genotyping was performed by SPF10 PCR...
Ascertaining epidemic phase for a sexually transmitted disease (STD) has depended on secular trend data which often contain significant artefacts. The usefulness of sexual network structure as an indicator of STD epidemic phase is explored in an analysis of community wide genital chlamydia reports, with network analysis of interviewed cases and linked sexual partners, in Colorado Springs, USA, ...
The authors studied life expectancy and risk factors for mortality of persons in the vegetative state (VS). The study participants were 1,021 California patients in the VS during 1981-1996. Because of the large sample size, the authors were able to use multivariate methods to assess the effect of several risk factors on mortality. The authors found a strong secular trend in infant mortality, wi...
Considerable evidence suggests that malnutrition affects human performance, health and survival, including physical growth, morbidity, mortality, cognitive development, reproduction, physical work capacity and risks for several adult-onset chronic diseases. In recent decades, development agencies and governments have emphasized selective interventions to improve health and nutritional status, s...
Tropospheric aerosols increase the shortwave reflectivity of the Earth-atmosphere system both by scattering light directly, in the absence of clouds, and by enhancing cloud reflectivity. The radiative forcing of climate exerted by anthropogenic sulfate aerosols, derived mainly from SO2 emitted from fossil fuel combustion, is opposite that due to anthropogenic greenhouse gases and is estimated t...
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