Table 1.
Summary of patient demographics and clinical characteristics (ITT analysis)
| Characteristic | PHILOS without augmentation N = 34 | PHILOS with screw augmentation N = 33 | Total N = 67 |
|---|---|---|---|
| Gender, n (%) | 34 | 33 | 67 |
| Female | 29 (85.3) | 26 (78.8) | 55 (82.1) |
| Male | 5 (14.7) | 7 (21.2) | 12 (17.9) |
| Age (years) | |||
| n | 34 | 33 | 67 |
| Mean (SD) | 76.1 (6.2) | 77.5 (7.4) | 76.8 (6.8) |
| Median (min; max) | 76.0 (65.0; 90.0) | 80.0 (65.0; 92.0) | 77.0 (65.0; 92.0) |
| Smoker, n (%) | 34 | 33 | 67 |
| No | 34 (100.0) | 31 (93.9) | 65 (97.0) |
| Yes | 0 (0.0) | 2 (6.1) | 2 (3.0) |
| Bone mineral density mean (mg/cm3) | |||
| n | 28 | 27 | 55 |
| Mean (SD) | 88.1 (21.8) | 86.1 (18.6) | 87.2 (20.1) |
| Median (min; max) | 86.7 (42.7; 148.4) | 82.0 (51.1; 128.9) | 84.5 (42.7; 148.4) |
| Mechanism of injury, n (%) | 34 | 33 | 67 |
| Fall | 34 (100.0) | 31 (93.9) | 65 (97.0) |
| Other | 0 (0.0) | 2 (6.1) | 2 (3.0) |
| Neer classification, n (%) | 34 | 33 | 67 |
| Anatomical neck two-part | 1 (2.9) | 0 (0.0) | 1 (1.5) |
| Surgical neck two-part | 3 (8.8) | 1 (3.0) | 4 (6.0) |
| Greater tuberosity two-part | 1 (2.9) | 0 (0.0) | 1 (1.5) |
| Greater tuberosity three-part | 15 (44.1) | 15 (45.5) | 30 (44.8) |
| Lesser tuberosity two-part | 0 (0.0) | 0 (0.0) | 0 (0.0) |
| Lesser tuberosity three-part | 2 (5.9) | 1 (3.0) | 3 (4.5) |
| Four-part | 9 (26.5) | 15 (45.5) | 24 (35.8) |
| Anterior two-part | 0 (0.0) | 0 (0.0) | 0 (0.0) |
| Anterior three-part | 0 (0.0) | 0 (0.0) | 0 (0.0) |
| Anterior four-part | 0 (0.0) | 0 (0.0) | 0 (0.0) |
| Anterior articular surface | 0 (0.0) | 0 (0.0) | 0 (0.0) |
| Posterior two-part | 0 (0.0) | 0 (0.0) | 0 (0.0) |
| Posterior three-part | 0 (0.0) | 0 (0.0) | 0 (0.0) |
| Posterior four-part | 3 (8.8) | 1 (3.0) | 4 (6.0) |
| Posterior articular surface | 0 (0.0) | 0 (0.0) | 0 (0.0) |
| Head-splitting articular surface | 0 (0.0) | 0 (0.0) | 0 (0.0) |
| Charlson comorbidity indexa | |||
| n | 34 | 33 | 67 |
| Mean (SD) | 0.6 (0.9) | 0.5 (0.8) | 0.6 (0.8) |
| Median (min; max) | 0.0 (0.0; 3.0) | 0.0 (0.0; 2.0) | 0.0 (0.0; 3.0) |
ITT intention to treat, PHILOS Proximal humerus internal locking system
aThe minimum possible score is 0 and the maximum possible score is 29. A higher score indicates a greater burden of comorbid conditions