Table 1.
Baseline Characteristics (N = 99)
| Characteristic |
Arthroscopy N = 49 |
PHT N = 50 |
Total N = 99 |
|
|---|---|---|---|---|
| Age (years, mean [SD]) | 32.9 (11.8) | 32.9 (9.1) | 32.9 (10.5) | |
| Gender: | Male | 31 (63%) | 26 (52%) | 57 (58%) |
| Female | 18 (37%) | 24 (48%) | 42 (42%) | |
| Current smoker: | Yes | 5 (10%) | 5 (10%) | 10 (10%) |
| No | 41 (84%) | 44 (88%) | 85 (86%) | |
| Missing | 3 (6%) | 1 (2%) | 4 (4%) | |
| Hip side to be considered for treatment: | right | 22 (45%) | 24 (48%) | 46 (46%) |
| left | 27 (55%) | 26 (52%) | 53 (54%) | |
| Bilateral symptoms: | Yes | 9 (18%) | 11 (22%) | 20 (20%) |
| No | 40 (82%) | 39 (78%) | 79 (80%) | |
| Duration of hip symptoms (mths, median [min, max]) | 24.0 (2.0, 84.0) | 18.0 (2.5, 120.0) | 20.0 (2.0, 120.0) | |
| Type of FAI: | Pincer | 9 (18%) | 9 (18%) | 18 (18%) |
| Mixed | 10 (20%) | 9 (18%) | 19 (19%) | |
| Cam | 30 (61%) | 32 (64%) | 62 (63%) | |
| Units of alcohol in average week (median [min, max]) | 3.0 (0.0, 16.0) | 2.0 (0.0, 12.0) | 2.0 (0.0, 16.0) | |
| Diabetic: | Yes | 1 (2%) | 1 (1%) | |
| No | 46 (94%) | 49 (98%) | 95 (96%) | |
| Missing | 2 (4%) | 1 (2%) | 3 (3%) | |
| Diagnosed chronic renal failure: | No | 47 (96%) | 49 (98%) | 96 (97%) |
| Missing | 2 (4%) | 1 (2%) | 3 (3%) | |
| Physical activity (UCLA score, mean [SD]) | 7.5 (2.6) | 7.2 (2.8) | 7.3 (2.7) | |
| HOOS pain (mean [SD]) | 59.4 (18.4) | 57.4 (18.9) | 58.4 (18.6) | |
| HOOS Symptom (mean [SD]) | 49.7 (17.5) | 50.7 (20.9) | 50.2 (19.2) | |
| HOOS ADL (mean [SD]) | 69.2 (18.0) | 65.9 (20.4) | 67.5 (19.3) | |
| HOOS Sport & Recreation (mean [SD]) | 47.9 (22.4) | 46.9 (23.6) | 47.4 (22.9) | |
| HOOS Quality of Life (mean [SD]) | 33.6 (16.1) | 30.1 (17.6) | 31.8 (16.9) | |
| Hip related Quality of Life (i-HOT-33, (mean [SD])) | 43.5 (17.6) | 40.4 (20.0) | 41.9 (18.8) | |
| SF-12 PCS (mean [SD]) | 40 (7.8) | 39 (8.4) | 39 (8.1) | |
| SF-12 MCS (mean [SD]) | 49 (11.2) | 48 (10.8) | 49 (10.9) | |
| EQ-5D-5L index score (mean [SD]) | 0.575 (0.21) | 0.544 (0.23) | 0.559 (0.22) | |
| EQ-5D-5L VAS (mean [SD]) | 68.9 (16.3) | 68.8 (14.2) | 68.8 (15.2) | |
| Maximum MRI alpha angle (mean [SD]) | 70.2 (11.9) | 70.6 (15.6) | 70.4 (13.9) | |
| dGEMRIC Combined (mean [SD]) | 679.6 (118.6) | 667.0 (127.4) | 673.6 (121.8) | |
| dGEMRIC Acetabular ROI (mean [SD]) | 661.2 (121.1) | 637.2 (145.3) | 649.7 (132.4) | |
| dGEMRIC Femoral ROI (mean [SD]) | 698.9 (137.0) | 698.4 (125.4) | 698.7 (130.2) | |
| dGEMRIC Z-score (mean [SD]) | −0.49 (0.70) | −0.45 (0.67) | − 0.47 (0.68) | |
| Total AP anterior coverage (%, mean [SD]) | 27.2 (8.2) | 24.7 (6.2) | 25.9 (7.3) | |
| Total AP posterior coverage (%, mean [SD]) | 47.4 (8.1) | 45.0 (8.3) | 46.2 (8.3) | |
| Total Femur coverage (%, mean [SD]) | 82.4 (7.6) | 81.0 (7.3) | 81.7 (7.4) | |
| LCE (%, mean [SD]) | 37.1 (5.4) | 34.7 (6.6) | 35.8 (6.2) | |
| LCE | < 25 | 2 (4%) | 2 (2%) | |
| 25+ | 47 (96%) | 48 (96%) | 95 (96%) | |
| Missing | 2 (4%) | 2 (2%) | ||
| Radiographic Measurements | ||||
| Acetabular Index (%, mean [SD]) | 2.5 (4.2) | 4.7 (4.8) | 3.6 (4.6) | |
| ACM angle (%, mean [SD]) | 45.0 (2.5) | 44.7 (3.6) | 44.8 (3.1) | |
| Extrusion Index (%, mean [SD]) | 15.0 (4.5) | 17.0 (5.7) | 16.0 (5.3) | |
| Cross-over-sign | Yes | 31 (63%) | 38 (76%) | 69 (70%) |
| No | 16 (33%) | 12 (24%) | 28 (28%) | |
| Missing | 2 (4%) | 2 (2%) | ||
| Retroversion Index (%, median [min, max]) | 6.7 (0.0, 46.0) | 11.1 (0.0, 54.7) | 10.2 (0.0, 54.7) | |
| Posterior wall sign | Yes | 29 (59%) | 37 (74%) | 66 (67%) |
| No | 18 (37%) | 13 (26%) | 31 (31%) | |
| Missing | 2 (4%) | 2 (2%) |
Data are number (%) unless otherwise indicated. UCLA University of California Los Angeles. iHOT-33 International Hip Outcome Tool. SF-12 12-item Short Form Health Survey. PCS Physical component score. MCS Mental component score
LCEA Lateral centre edge angle. Hip Osteoarthritis MRI Scoring System (HOAMS). ROI = region of interest
ACM Angle constructed by the following points: (A) lateral edge of the acetabulum, (M) midpoint of a line connecting the lateral and the inferior acetabular edge, (C) point of the bony acetabulum intersecting the perpendicular line relative to line AM through point M
Hip2Norm results are for study hip