Perioperative indicators for complications and early mortality following hip fracture surgery. The protocol of the Rotterdam hip fracture study.

Background:
The primary aim of the present study is to validate earlier suggested risk factors and find new associated factors for 30-day mortality. Secondary aims are;
• Collect epidemiological data about the background and incidence of patients with a hip fracture in the Rotterdam area between 2018 and 2022.
• Analyse clinical outcomes such as; in hospital mortality, length of hospital stay and complications after surgery to gain a more complete insight in the postoperative outcome.
• Monitor the implementation and functioning of a geriatric trauma unit within orthopaedic trauma units.
• Develop a more specific 30-day mortality prediction tool compared to the NHFS (Nottingham hip fracture score) for clinical usage.

Study design and population:
• Multicenter, prospective, observational study
• All patients over 65 years of age, with an acute proximal hip fracture (intracapsular, trochanteric or subtrochanteric) are included.
Excluded are patients with multi trauma injuries, pathologic fractures without sufficient trauma mechanism, or patients with no understanding of the Dutch or English language

Early post-operative mortality is particularly high, with reported 30-day mortality rates of 7.5 - 13.3%.
Up to 5% of the hip fracture surgeries is performed in patients with a high death within 30-days after surgery. If the preoperative mortality risk calculation is more precise, surgery can be avoided in a select patient group.

30 days, 3 months and 12 months after hospital admission.

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