Despite the large differences in medical consumption, however, the RAND experiment found almost no detectable health differences across these groups. To measure health, comprehensive physical exams were given to all participants both before and after the study.26 These exams included 22 physiological measurements like blood pressure, lung capacity, walking speed, and cholesterol levels. The exams also used extensive questionnaires to gauge five measures of overall well-being: physical functioning, role functioning (i.e., at work), mental health, social health, and general health perception.27
