Table 1.

Demographics and functional assessment of patients with periacetabular osteolysis on plain films

Measurement index	Mean score	Range
Harris Hip Scale	76	55–89
WOMAC (total)	569	187–1410
WOMAC (pain)	85	2–221
WOMAC (stiffness)	59	5–136
WOMAC (ADLs)	425	135–1068
SF-36-physical composite	55	20-85
SF-36-mental composite	76	33–96

There were 20 patients in this study (14 male and 6 female) with a mean age of 63.8 years (range 52–76). Nineteen patients were Caucasian, one African-American. The measurements were obtained at a mean of 10.8 years post-operation (range 5–14). For WOMAC (Western Ontario and McMaster University Osteoarthritis Index), a higher score indicates greater pain, stiffness, or difficulty. For the Harris Hip Scale, higher scores indicate better results. For SF-36 (short form 36 questionnaire) higher scores indicate better health. ADL, activities of daily living.