Tobacco smoke exposure caused heart attacks

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In a case control study to determine whether second hand tobacco smoke exposure caused heart attacks which of the following would be an appropriate case group and control group? Group of answer choices Cases would include people who were exposed to second hand tobacco smoke and had a heart attack and controls would include people who were exposed to second hand tobacco smoke and did not have a heart attack. Cases would include people who were exposed to second hand tobacco smoke and had a heart attack and controls would include people who were not exposed to second hand tobacco smoke and did not have a heart attack. Cases would include people who had a heart attack and controls would include people who did not have a heart attack. Cases would include people who were exposed to second hand tobacco smoke and controls would include people who were not exposed to second hand tobacco smoke.

Reference no: EM133610749

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