COMPSCI C8 Lecture Notes - Lecture 2: Soho, Cardiovascular Disease, Scientific Control
14 Mar 2018
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Individuals, study subjects, participants, units: chocolate study: european adults. Is there any relation between chocolate consumption and heart disease: associatio(cid:374): (cid:862)a(cid:374)(cid:455) relatio(cid:374)(cid:863) Some data: chocolate consumers: 12% died, non chocolate consumers: 17. 4% died. Association is pretty loose and easy to claim. Does chocolate consumption lead to a reduction in heart disease: causality: this question is often harder to answer, (cid:862)the stud(cid:455) does(cid:374)"t pro(cid:448)e a cause-and-effect relationship between chocolate and reduced risk of heart disease a(cid:374)d stroke. (cid:863) Miasmas: bad smells given off by waste and rotting matter. Believed to be the main source of disease. Suggest remedies: fly to clene air, a pocket full of posies, fire off barrels of gunpowder. Areas with their own wells had lower deaths. Turns out sewage was leaking into pump. Father of epidemiology: study of how epidemics spread. Proof: comparison of 2 london water suppliers. The two groups were similar except for the treatment. Keep the groups as similar as possible except for treatment.
