Table 1 Univariate analysis between initial and subsequent (contralateral) fracture groups
| Â | First fracture | Contralateral hip fracture | P value |
|---|---|---|---|
Gender | |||
 Male |  | 60 (33.1%) |  |
 Female |  | 121 (66.9%) |  |
Mean age | 80 (75, 84) Range 49–96 | 82 (77, 88) range 52–96 |  |
Mean hospital day | 8 (7, 11) | 9 (7, 11) | 0.001 |
Mechanism of injury | |||
 Fall | 177 (97.8%) | 179 (98.9%) |  |
 Traffic accident | 4 (2.2%) | 1 (0.6%) |  |
 Fall from high | 0 | 1 (0.6%) |  |
Singh index | Â | Â | 0.213 |
 I | 107 | 118 |  |
 II | 66 | 60 |  |
 III and above | 8 | 3 |  |
Surgical procedure | Â | Â | 0.000 |
 PFNA, Intramedullary nail | 67 (37.0%) | 100 (55.2%) |  |
 DHS, plate, cannulated screw, FNS | 25 (13.8) | 8 (4.4%) |  |
 Arthroplasty | 89 (49.2) | 73 (40.3%) |  |
Mean Fracture-fracture intervals (months) | Â | 24 (7, 36) | Â |
 Within 3 months |  | 12 (6.6%) |  |
 3 months–1 year |  | 52 (28.7%) |  |
 1–2 years |  | 38 (21.0%) |  |
 2–5 years |  | 43 (23.8%) |  |
 5 + years |  | 36 (19.9%) |  |
Mortality | |||
 Within 30 days |  | 4 (2.2%) |  |
 Within 1 year |  | 32 (17.7%) |  |
 Within 2 year |  | 25 (13.8%) |  |
 More than 2 years |  | 120 (66.3%) |  |