Figure 1. Assumed distributions of patient overall satisfaction in the power analysis, as measured by an visual analogue scale where 0 means "very satisfied" and 10 means "very dissatisfied". The intramuscular group is assumed to follow a lognormal distribution with mean 1.5 and standard deviation of 1, on the logarithmic scale. The subcutaneous patients are assumed to follow a lognormal distribution with mean 1.5 and standard deviation of 1, on the logarithmic scale.