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Case Control Study Template _Epidemiology week7 Application

Typesmethods of data collection eg questionnaire

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Type(s)/Method(s) of Data Collection (e.g. questionnaire, medical records, whether or not there was any procedure for validating some or the data): Source of Data: Medical Records Type of Data Analysis: Odds Ratio and its confidence interval Results/Main Findings of Study: Cases were less likely than controls to have been vaccinated (adjusted odds ratio [OR] 0.53, 95% confidence interval [CI] 0.40–0.70). This putative protective role of the vaccine was not observed for patients who had received the vaccine up to 1 year before myocardial infarction (adjusted OR 0.85, 95% CI 0.54–1.33). In contrast, if vaccination had occurred 2 years or more before the hospital admission, the association was stronger (adjusted OR 0.33, 95% CI 0.20–0.46).
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Assessment of Bias (selection/information): Other cardiovascular risk factors, such as smoking, medication use, obesity and lifestyle factors, including exercise and diet, could not be incorporated in the model because these characteristics are not recorded in the research database. This may be a potential bias in study. Assessment of Confounders: There may have been residential confounding. Comments: Study was nicely conducted. There are some limitations of this study, such as residential confounding, no record of some important characterstics such as Other cardiovascular risk factors, such as smoking, medication use, obesity and lifestyle factors, including exercise and diet,
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