Cultural validation of an instrument to measure the level of knowledge in biostatistics. Rev Med Hered online. 2016, vol.27, n.3, pp.152-161.ISSN 1018-130X.Objective: To make the cultural validation and measure the reliability of a questionnaire which will assess level of knowledge of bio-statistics.
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Methods: The questionnaire was initially translated to Spanish by 3 translators. Then each translation was retranslated to English. The translations and re-translations were assessed by correlation and measure of agreement. A committee of experts built a consensus document and afterwards degree of comprehension was assessed on a 30 subject group. Finally a test/re-test was done in order to assay the temporal stability of the instrument. Results: The correlation between the couples of translations from English to Spanish was rs = 0.21, rs = 0.25 y rs= 0.90 (p.
Bioelectrical impedance analysis (BIA) is an easy non-invasive technique which can be used in both healthy and patient populations. To guarantee reliability and accuracy it is necessary to understand the basic principles of its use and to control the strict application protocol of the measurement conditions.
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BIA can determine total body water and fat-free mass in subjects without body fluid and electrolyte alterations. When selecting a predictive equation, issues such as validation against a reference method and adjustment for population age and gender must be taken into account. The purpose of this review is to provide a critical analysis about the use of BIA and to explain the importance of carrying out well defined application standards to ensure accuracy in body composition estimation.