To what extent can the observed association between the exposure and outcome be attributed to non-causal explanations?
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Get it written →Appraise the internal validity – (30 points)
To what extent can the observed association between the exposure and outcome be attributed to non-causal explanations? Are the results likely to be affected by errors ? what were these errors – corroborate your arguments with details from the paper! Also mention methodological strengths that support good internal validity.
Do HM., Lee SS., Jung PP., Lee HM. Intake of fruits, vegetables, and soy foods in
Relation to Breast Cancer Risk in Korean Women: A Case-Control Study, Nutrition and Cacer 2007, 57;1, 20-27,
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