Orthopaedics · Geriatrics · Emergency Medicine
Rotterdam Hip Fracture Mortality Prediction, 30 days calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
Allowed range: 18–110 years
Age in years, as printed in Figure 3.
Allowed range: 1–6 g/dL
Enter grams per litre. Each extra g/L lowers the linear predictor.
Allowed range: 0–6 points
From 0 to 6. One point for independence in each of bathing, dressing, toileting, transferring, continence, and feeding.
Result
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Clinical inputs
- Age (years)Accepted range: 18 to 110
- Sex
- Admission albumin (g/L)Accepted range: 10 to 60
- Dementia
- Katz independence score (points)Accepted range: 0 to 6
- ASA class 4
- Nursing-home residence
Primary source
de Jong L et al. Multidimensional approach for predicting 30-day mortality in patients with a hip fracture. J Bone Joint Surg Am. DOI: 10.2106/JBJS.23.01397. PMID: 39836737. Figure 3: linear predictor = −2.69102004 + (albumin g/L × −0.04421566) + (age in years × 0.03059813) + (gender × −1.01157133) + (dementia × 0.36026082) + (Katz-ADL × −0.08530769) + (ASA 4 × 0.85617275) + (residence in a nursing home × 0.72578208). Gender is male 0 and female 1. Dementia, ASA 4, and nursing-home residence are 0 for no and 1 for yes. Katz-ADL is 0 to 6, with 1 point for independence in each of bathing, dressing, toileting, transferring, continence, and feeding. ASA 4 is a severe incapacitating disease process that is a constant threat to life. Figure 3 prints predicted 30-day mortality (%) = EXP(linear predictor) / (1 + EXP(linear predictor)). The results section reports that quantity as a percent: the testing-cohort mean predicted mortality was 8.8%. The value returned here is 100 times the printed ratio. (2025)
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