ANALIZE MEDICALE DE LABORATOR
Aici gasiti analizele medicale grupate pe categorii precum si detalii generale si specifice pentru categoriile respective.
Selectati o categorie din lista de mai jos:
Solutie antistress!
Construieste poduri :)
Prinde pisica neagra :)
'Extreme' Teenagers
Adolescents have grown taller and put on weight over the last thirty
years, but the problem of underweight teens may be worse, a study in the
online open access journal BMC Public Health suggests. An analysis of the
height, weight, and body-mass index of teenagers during 1966-1969 and
1995-1997 in Norway demonstrates a shift towards taller and heavier
teenagers, but also hints that there are more underweight adolescents.
Health researchers commonly use body mass index (BMI), calculated as
weight in kilograms divided by the height in meters squared, in
weight-related health studies. Sigrid Bjørnelv of the Norwegian University
of Science and Technology and colleagues write that changes in these
measurements across society over periods of time often reflect changes in
nutrition. Better nutrition increases both height and weight, and reduces
health problems connected with malnutrition. However, increases in BMI can
also point to poor diet and lack of exercise.
Bjørnelv and her colleagues analyzed height, weight and calculated BMI
data for 6774 14-18-year olds who participated in the Young-HUNT study in
1995-97. They compared the data with 8378 adolescents in the same age
group collected by Norway's National Health Screening Service in 1966-69.
The researchers found significant changes between the two periods. Height
and weight increased significantly in both sexes and all ages, while
average (mean) BMI increased significantly in boys of all ages but only in
18-year old girls. Mean BMI did not change for girls aged 14-17 years.
Critically, the team revealed a change in distribution of BMI, with an
increase in the upper percentile values and a decrease in the lower
percentile values.
While the increase in the highest percentile implies better nutrition and
an increase in prevalence of obesity amongst adolescents in agreement with
other studies, explains Bjørnelv, the decrease in the lower percentile
values implies that the thinnest adolescents in 1995-97 had a lower BMI
than their counterparts in 1967-69. This finding requires further study.
Article:Changes in BMI-distribution from 1966-69 to 1995-97 in adolescents. The
Young-HUNT Study, Norway.
Sigrid Bjornelv, Stian Lydersen, Arnstein Mykletun and Turid L Holmen
BMC Public Health
Please click here
BioMed Central is an independent online
publishing house committed to providing open access to peer-reviewed
biological and medical research. This commitment is based on the view that
immediate free access to research and the ability to freely archive and
reuse published information is essential to the rapid and efficient
communication of science.
BioMed Central currently publishes over 180 journals across biology and
medicine. In addition to open-access original research, BioMed Central
also publishes reviews, commentaries and other non-original-research
content. Depending on the policies of the individual journal, this content
may be open access or provided only to subscribers.
www.biomedcentral.com
"Extreme" adolescenti - 'Extreme' Teenagers - articole medicale engleza - startsanatate