BPK 140 Chapter Notes - Chapter 2: Cardiovascular Disease, Scale-Invariant Feature Transform, Blind Experiment
19 Sep 2017
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2. 1 overview: not all health claims are true. 2: example: subjects may be asked to rub a toothbrush over their tongue and the inside of their mouth. Scientists can grow the skin cells that come off on the toothbrush in little, covered, glass dishes. Later, they can expose the cells to a cancer-causing material, and then treat half of the cells with a cancer- fighting chemical. Investigators have recorded their blood pressure, serum cholesterol levels, smoking habits, body weight, drinking habits, exercise habits, and a number of other traits for each of the participants in this study. Over the years, many of the original subjects have died. The cause of death and age of the subjects at the time of death have been noted. As is typical of epidemiological studies, no attempt has been made to modify the lifestyle of the subjects; they have just been studied. In 1951, two oxford professors collected data on 35,000 males physicians in britain.
