... School, University of Michigan, Ann Arbor, MI, USA, 2Division of Gastroenterology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA, 3School of Health Sciences, ... for citation purposes)mean of 60, and a standard deviation of 18 points on the0–100 scale. With an alpha of 0.05, and a power of 80%,this would require a sample size of 26 subjects. We con-servatively ... (left half of Table 2).Approximately half (6 of 13) of the frequent and respon-sive symptom domains were derived from standard indi-ces of UC disease activity (upper left quadrant of Table 2).However,...