Table 1.
Demographics
| Characteristic | Frequency or mean |
|---|---|
| Number of patients | 258 |
| Number of hips | 300 |
| Gender of patients | |
| Males | 136 (53%; 159 hips) |
| Females | 122 (47%; 141 hips) |
| Age (years) | 57 (range, 24–85; SD 11) |
| Height (inches) | 68 (range, 58–78; SD 4) |
| Weight (pounds) | 202 (range, 105–350; SD 51) |
| Body mass index (kg/m2) | 31 (range, 18–64; SD 7) |
| Diagnosis | |
| Osteoarthritis | 219 (73%) |
| Avascular necrosis | 36 (12%) |
| Developmental dysplasia | 14 (5%) |
| Posttraumatic arthritis | 11 (4%) |
| Rheumatoid arthritis | 9 (3%) |
| Legg-Calvé-Perthes | 7 (2%) |
| Slipped capital femoral epiphysis | 2 (1%) |
| Ankylosing spondylitis | 2 (1%) |
| Activity level | |
| Sedentary | 2 (1%) |
| Semisedentary | 1 (< 1%) |
| Light labor | 136 (45%) |
| Moderate manual labor | 122 (41%) |
| Heavy manual labor | 39 (13%) |
| Charnley classification | |
| A = unilateral hip condition | 134 (45%) |
| B = bilateral hip condition | 117 (39%) |
| C = factors other than hip(s) that affect walking function | 19 (16%) |