Helmer de Jesús Zapata-Ossa

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OBJECTIVE Describing how the cluster sampling statistical technique can be applied to health surveys. METHODS The article describes the most important aspects for each methodological step, emphasising cluster sampling's foundations. It was applied to a population of around 100,000 inhabitants from commune 18 in Cali. The sample covered 30 city blocks and(More)
INTRODUCTION Self-rated health (SRH) has beeen considered an important marker of quality of life and an independent predictor of mortality in older adults. OBJECTIVE To determine the prevalence of poor SRH and identify risk factors associated with poor SRH among older adults residing in the Commune 18 of the city of Cali, Colombia, in 2009. METHODS A(More)
Introduction: Self-rated health (SRH) has beeen considered an important marker of quality of life and an independent predictor of mortality in older adults. Objective: To determine the prevalence of poor SRH and identify risk factors associated with poor SRH among older adults residing in the Commune 18 of the city of Cali, Co-lombia, in 2009. Methods: A(More)
OBJECTIVE This article presents the results of monitoring students who enrolled at Universidad Santiago de Cali (USC) during the second half of 2004. Its purpose was to determine the influence of smoking, the academic programme and the cost of enrollment on student survival over a three-year period (2004-2007). METHOD The study involved a prospective(More)
Objective To determine the relation between bad self-rated health (SRH) and outcomes of physical and mental health and geriatric syndromes over one year. Methods A prospective study. A cohort of 231 adults over 60 years of age from commune 18 in Santiago de Cali, Colombia were classified into good and poor self-rated of health status according to results of(More)
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