Table 2.
Baseline demographic and clinical characteristics of the study patients
| Characteristic | Study group (n = 34) | Control group (n = 30) |
| Men, % (n) | 79 (27) | 87 (26) |
| Age in years, mean ± SD | 46 ± 10 | 45 ± 10 |
| Ethnic origina, % (n) | ||
| White | 88 (30) | 97 (29) |
| Black | 6 (2) | 3 (1) |
| Asian | 3 (1) | 0 (0) |
| Other | 3 (1) | 0 (0) |
| Use of glucocorticoids, % (n) | 18 (6) | 23 (7) |
| Alcohol consumption, % (n) | 38 (13) | 80 (24) |
| Smoking, % (n) | 47 (16) | 87 (26) |
| Clinical evaluation of the treated hip | Study group (n = 25)b | Control group (n = 29)b |
| WOMAC total score, mean ± SD | 41 ± 23 | 37 ± 28 |
| WOMAC pain subscale score, mean ± SD | 42 ± 23 | 37 ± 29 |
| Radiologic evaluation of the treated hip | Study group (n = 25)b | Control group (n = 29)b |
| Combined necrotic angle of Kerboul in ° | ||
| n | 23 | 27 |
| mean ± SD | 266 ± 85 | 255 ± 102 |
| ARCO classificationc | ||
| n | 25 | 29 |
| Stage I, % (n) | 20 (5) | 10 (3) |
| Stage II, % (n) | 76 (19) | 83 (24) |
| Stage III, % (n) | 4 (1) | 0 (0) |
| Stage IV, % (n) | 0 (0) | 7 (2) |
Because of rounding, some percentages do not add up to 100%.
a
The ethnic origin of the patients was identified by the principal investigator or the study data nurse based on observation or information provided by the patient.
b
Data were collected only in treated patients.
c
Adjudicated ARCO classification for patients included in the interim analysis; classification was performed by the independent radiologist for the remaining patients. ARCO = Association Research Circulation Osseous; n = total number of patients; % (n) = percentage (number) of patients within a category; SD = standard deviation.