16 documents found, page 1 of 2

Effects of vitamin D supplementation on cardiovascular risk factors in shift wo...

Objective: The present clinical study aims to describe protocol to evaluate the effects of vitamin D3 supplementation on the cardiovascular risk factors in a population of rotating shift workers. Design: A randomized, double-blind, placebo-controlled, parallel group clinical trial testing 2 oral dosages of cholecalciferol (14,000 IU and 28,000 IU per week) for 12 months. Setting: The primary outcome for evaluat...

Um novo método para alocação de unidade em subamostras representativas baseado ...

Em estudos experimentais nos quais se deseja verificar a eficácia de alguma intervenção, é usual a presença de grupos que sofrerão ou não estas intervenções para que comparações a respeito de fatores relacionados a estas intervenções possam ser medidos. Para garantir que tais comparações sejam válidas, é necessárias que os grupos apresentem características o mais semelhantes possível entre si, definidas no iníc...

Qualidade de vida e excesso de peso em trabalhadores em turnos alternantes.

Objetivo: identificar a percepção dos trabalhadores de turnos alternantes de uma mineradora da região dos Inconfidentes, Minas Gerais, sobre sua qualidade de vida (QV) e analisar sua associação com indicadores de excesso de adiposidade corporal. Métodos: estudo transversal com 437 trabalhadores em turnos alternantes com um ou mais fatores de risco cardiovascular. Dados sociodemográficos e clínicos foram analisa...

Adiposity indicators as a screening method for polysomnography in shift workers.

Objective: to verify the discriminatory power of adiposity indicators in the prediction of obstructive sleep apnoea (OSA) in shift workers. Methods: a crosssectional study carried out in an iron ore extraction company, in Minas Gerais, Brazil. Anthropometric data were collected and polysomnography (PSG) was performed in 118 male shift workers who owned at least one overall risk factor for cardiovascular disease...

Hypovitaminosis D is associated with visceral adiposity, high levels of low-den...

Background: Studies suggest that there is a strong association between low vitamin D levels and cardiovascular disease (CVD) and its risk factors (RFs). Hypovitaminosis D (25(OH)D < 30 ng/mL or 75 nmol/L) is a recent public health problem that has reached different populations. The objective of the study was to investigate whether hypovitaminosis D is an additional mechanism to explain the disturbances in the l...

Ability of body mass index to predict abnormal waist circumference : receiving ...

Body mass index (BMI) and waist circumference (WC) are the most used anthropometric measures to identify obesity. While BMI is considered to be a simple and accurate estimate of general adiposity, WC is an alternative surrogate measure of visceral obesity. However, WC is subject to significant inter-examiner variation. The aim of the present study was to correlate BMI and WC measures in a group of Brazilian adu...

Heart rate variability in shift workers : responses to orthostatism and relatio...

In order to investigate the response of heart rate variability (HRV) components to postural change and their association with cardiovascular risk factors in shift workers, a cross-sectional study with 438 Brazilian males rotating shift workers was done. Anthropometric, body composition, and clinical measures were collected. Electrocardiogram was recorded for 3 minutes, in the supine and orthostatic position, an...

Risco nutricional na população urbana de Ouro Preto, Sudeste do Brasil : estudo...

Projeto corações do Brasil.

Síndrome metabólica em trabalhadores em turnos alternantes de uma mineradora na...

Objective: To investigate the prevalence of metabolic syndrome (MetS) and its components among alternating shift workers of a mining company in the region of Inconfidentes --‐ MG. Methods: 678 male alternating shift workers of four mines in a miningregion in Inconfidentes were evaluated. Sociodemographic, behavioral, anthropometric, biochemical and blood pressure data were collected. MetS was diagnosed accordin...