Intraobserver Error Calculation
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What Is Technical Error Of Measurement
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Inter Observer Error
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Intraobserver Variation
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Intraobserver Variability Definition
anthropometric measures in a longitudinal cohort of patients initiating ART in West AfricaMarylineSicotte1Email author, intraobserver reliability MarielleLedoux3, Maria-VictoriaZunzunegui1, 2, SouleymaneAg Aboubacrine4, Vinh-KimNguyen1, 5 and the ATARAO groupBMC Medical Research Methodology201010:102DOI: 10.1186/1471-2288-10-102© Sicotte et al; licensee BioMed Central Ltd.2010Received: 14May2010Accepted: http://www.ncbi.nlm.nih.gov/pubmed/21519782 22October2010Published: 22October2010 Open Peer Review reports Abstract Background Anthropometric measurements are a non invasive, inexpensive, and suitable method for evaluating the nutritional status in population studies with relatively large sample sizes. However, anthropometric techniques are prone to errors that could arise, for example, from the inadequate http://bmcmedresmethodol.biomedcentral.com/articles/10.1186/1471-2288-10-102 training of personnel. Despite these concerns, anthropometrical measurement error is seldom assessed in cohort studies. We describe the reliability and challenges associated with measurement of longitudinal anthropometric data in a cohort of West African HIV+ adults . Methods In a cohort of patients initiating antiretroviral treatment in Mali, we evaluated nutritional status using anthropometric measurements(weight, height, mid-upper arm circumference, waist circumference and triceps skinfold). Observers with no prior experience in the field of anthropometry were trained to perform anthropometrical measurements. To assess the intra- and inter-observer variability of the measurements taken in the course of the study, two sub-studies were carried out: one at the beginning and one at the end of the prospective study. Twelve patients were measured twice on two consecutive days by the same observer on both study occasions. The technical error of m
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