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Which of the following might reasonably be studies using a case-crossover design?                             &nbs

Which of the following might reasonably be studies using a case-crossover design?

                             

Blood type as a predictor of diabetes

                             

Alcohol consumption as a predictor of online shopping activity

                             

Radiation exposure as a predictor of cancer

                             

Illnesses during pregnancy as a predictor of birth defects

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1 c Case crossovers designs are analogues to traditional cross over design from intervention studies.it compares the same person exposed versus unexposed.it is used for studying the etiology of acute outcomes such as myocardial infarctions or deaths from acute events in situations where the suspected exposure is transient and its effect over a short time.

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