Descriptive statistics for SF-36 scores (n = 4,683).

Note: PF = physical functioning; RP = role physical; BP = bodily pain; GH = general health; VT = vitality; SF = social functioning; RE = role emotional; MH = mental health; PCS = physical component score (comprises of PF+RP+BP+GH); MCS = mental component score (comprises of VT+SF+RE+MH); SD = standard deviation; IQR = interquartile range (25th–75th percentile).SF-36 scores range from zero (worst health) to 100 (best health) and are scaled relative to those of the United States population (mean = 50, standard deviation = 10).