Table 1.
Baseline characteristics
| Sliding hip screw (n=542) | Cancellous screws (n=537) | Total (n=1079) | |
|---|---|---|---|
| Age (years) | 72.2 (12.0) | 72.0 (12.3) | 72.1 (12.2) |
|
| |||
| Sex | |||
| Male | 212/535 (40%) | 210/535 (39%) | 422/1070 (39%) |
| Female | 323/535 (60%) | 325/535 (61%) | 648/1070 (61%) |
|
| |||
| Ethnic origin | |||
| Native | 1/533 (<1%) | 3/535 (1%) | 4/1068 (<1%) |
| South Asian | 65/533 (12%) | 65/535 (12%) | 130/1068 (12%) |
| East Asian | 6/533 (1%) | 4/535 (1%) | 10/1068 (1%) |
| Black | 22/533 (4%) | 18/535 (3%) | 40/1068 (4%) |
| Hispanic | 3/533 (1%) | 1/535 (<1%) | 4/1068 (<1%) |
| White | 436/533 (82%) | 444/535 (83%) | 880/1068 (82%) |
|
| |||
| Smoking history | |||
| Never smoked | 268/533 (50%) | 276/532 (52%) | 544/1065 (51%) |
| Current smoker | 101/533 (19%) | 100/532 (19%) | 201/1065 (19%) |
| Former smoker | 164/533 (31%) | 156/532 (29%) | 320/1065 (30%) |
|
| |||
| Current drugs | |||
| None | 170/535 (32%) | 179/534 (34%) | 349/1069 (33%) |
| NSAIDS | 86/535 (16%) | 64/534 (12%) | 150/1069 (14%) |
| General cardiac | 167/535 (31%) | 167/534 (31%) | 334/1069 (31%) |
| Opioid analgesics | 43/535 (8%) | 56/534 (10%) | 99/1069 (9%) |
| Pulmonary drugs | 58/535 (11%) | 69/534 (13%) | 127/1069 (12%) |
| Anti-hypertension drugs | 244/535 (46%) | 252/534 (47%) | 496/1069 (46%) |
| Osteoporosis drugs | 67/535 (13%) | 73/534 (14%) | 140/1069 (13%) |
|
| |||
| BMI | |||
| Underweight (BMI <18.5) | 37/530 (7%) | 33/528 (6%) | 70/1058 (7%) |
| Normal weight (18.5–24.9) | 276/530 (52%) | 300/528 (57%) | 576/1058 (54%) |
| Overweight (25–29.9) | 159/530 (30%) | 148/528 (28%) | 307/1058 (29%) |
| Obese (30–39.9) | 58/530 (11%) | 47/528 (9%) | 105/1058 (10%) |
|
| |||
| Fractured hip | N=535 | N=535 | N=1070 |
| Left | 280/535 (52%) | 281/535 (53%) | 561/1070 (52%) |
| Right | 255/535 (48%) | 254/535 (47%) | 509/1070 (48%) |
|
| |||
| Mechanism of injury | |||
| Fall | 515/533 (97%) | 521/534 (98%) | 1036/1067 (97%) |
| Spontaneous | 13/533 (2%) | 6/534 (1%) | 19/1067 (2%) |
| Other low energy trauma | 5/533 (1%) | 7/534 (1%) | 12/1067 (1%) |
|
| |||
| History of surgery to affected hip | |||
| Yes | 3/535 (1%) | 0/535 (0%) | 3/1070 (<1%) |
| No | 532/535 (99%) | 535/535 (100%) | 1067/1070 (100%) |
|
| |||
| Additional injuries | |||
| Yes | 67/535 (13%) | 72/535 (13%) | 139/1070 (13%) |
| No | 468/535 (87%) | 463/535 (87%) | 931/1070 (87%) |
Data are mean (SD) or n/N (%). For some subgroups, the numbers of patients analysed are smaller than that of the overall group number because data are missing for some variables. NSAIDS=non-steroidal anti-inflammatory drugs. BMI=body-mass index.