Percentage of participants who considered each descriptor as preferable (sum of 1st and 2nd place).

Elderly, older than 60 years; Young, 60 years or younger;Low education, junior high school or high school only; high education, college/university or graduate school;Short duration, thirty six months or less; Long duration, more than thirty six months;Low pain intensity, sum of "none" and "mild"; High pain intensity, sum of "moderate" and "severe" of Verbal Rating Scale (VRS)