Article history: Received 11 June 2015 Received in revised form 13 November 2015 Accepted 20 December 2015 Available online 9 January 2016 The g-loss predicted based on genetic selection is smaller than that observed across various ratio-scale measures of cognitive ability. The difference may result in part from the accumulation of deleterious mutations across generations, reducing g via their ...

INTRODUCTION Given its location on the Andes, the Northwest region of Argentina is geographically, socioeconomically, culturally, and biologically heterogeneous, and this is reflected on an infant mortality rate (IMR) that is higher than in any other Argentine region. OBJETIVE To estimate IMR, neonatal mortality rate (NMR), and post-neonatal mortality rate (PNMR), and to analyze their spatial...

In order to assess secular trends in growth of the Vietnamese population following a period of rapid economic growth, a follow-up study on physical growth and nutritional status of adults was carried out in a rural section of the Red River delta, Vietnam 30 years after the original study. The initial study in 1976 found that average height and weight of Vietnamese adults was similar to data col...

OBJECTIVE Congenital defects remain the second cause of perinatal and infant death and the third cause between the second and fifth years of life in Asturias. These anomalies generate substantial morbidity. The aim of the present study was to describe the population-based frequency of congenital defects in Asturias and their forms of presentation. METHODS Data from the population-based Regist...

PURPOSE To evaluate the number of published randomized controlled trials (RCTs) focusing on mechanical low back pain (MLBP) rehabilitation, the secular (i.e., long-term) trend, and the distribution of interventions studied. METHODS All included RCTs were extracted from all Cochrane systematic reviews focusing on rehabilitation therapies for MLBP, and two independent reviewers screened and ana...

We determined the secular trend in blood lead levels in a cohort of 321 children born in Mexico City between 1987 and 1992. Blood lead level was measured every 6 months during a 10-year period. We modeled the effect of yearly air lead concentration nested within the calendar year in which the child was born, family use of lead-glazed pottery, socioeconomic status, year in which the child was bo...

OBJECTIVE To examine trends in height among 5- to 17-year-old children between 1973 and 1992. DESIGN A panel design consisting of 7 cross-sectional surveys. PARTICIPANTS All schoolchildren residing in Bogalusa, La, were eligible. A total of 24 070 examinations were performed. RESULTS During the study period, the mean height of schoolchildren increased by 0.70 cm per decade independently o...

OBJECTIVE To examine the trend in prevalence of overweight and obesity in schoolchildren from south-eastern Poland over a 10-year period. MATERIALS AND METHOD A cross-sectional study was conducted in randomly selected primary schools. In total, 4,248 children (2,182 boys and 2,066 girls), mean age 10.5±2.4 years, were examined in 1998, and 2,412 children (1,184 boys and 1,228 girls), mean age...

BACKGROUND AND PURPOSE Pathological patterns of stroke are different in various races, with the predominant stroke type in the Chinese being intracerebral hemorrhage. A total of 31,078 deaths from cerebral infarction and 77,773 deaths from cerebral hemorrhage in Taiwan were reported for groups of subjects aged 40-79 years during the period 1974-1988 to elucidate their secular trends. METHODS ...

Aims. We show a possible explanation for the recently reported secular increase of the Astronomical Unit (AU) by Krasinsky and Brumberg (2004). Methods. The mechanism proposed is analogous to the tidal acceleration in the Earth-Moon system, which is based on the conservation of the total angular momentum and we apply this scenario to the Sun-planets system. Results. Assuming the existence of so...