Figure 2.

Relative importance of attributes (overall results, n = 395). Relative importance is relatively described values calculated by the distance between the highest and the lowest attribute levels. For example, the distance of sustained efficacy after drug withdrawal is 0.66, addition of the highest level of 0.316 and the lowest level of 0.344. This value is converted to percentage of total which is the sum of all attributes' distance. The higher percentages indicate the more preferred attribute.