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Multidimensional biomarkers of nutritional, inflammatory, and metabolic status identify risk in geriatric hip fracture patientsBlood tests predict hip fracture surgery risks

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Key Takeaway
Consider multidimensional biomarkers like neutrophil-to-lymphocyte ratio and nutritional indices for perioperative risk screening.

This meta-analysis evaluates the prognostic value of multidimensional biomarkers, including immune, nutritional, inflammatory, and metabolic status, in elderly patients with hip fractures. The study included a large sample size of 28,605 patients to assess both short-term and medium-to-long-term postoperative outcomes.

Several indicators showed significant associations with risk. For short-term risks, a high neutrophil-to-lymphocyte ratio (OR = 5.17; 95% CI: 2.99–8.92) and low prognostic nutritional index (OR = 3.29; 95% CI: 2.22–4.88) were strongly associated with increased risk. Other significant short-term associations included high glucose-to-albumin ratio (OR = 2.31; 95% CI: 1.86–2.88), and continuous measures of C-reactive protein to albumin ratio (OR = 1.33; 95% CI: 1.19–1.47) and neutrophil-to-lymphocyte ratio (OR = 1.08; 95% CI: 1.03–1.13).

For medium-to-long-term outcomes, a high C-reactive protein to albumin ratio (OR = 3.19; 95% CI: 2.20–4.62), systemic immune-inflammation index (HR = 2.00; 95% CI: 1.37–2.91), and geriatric nutritional risk index (OR = 2.95; 95% CI: 1.94–4.48) were associated with increased risk. These findings support the use of these indicators as accessible tools for perioperative risk screening, though they indicate association rather than direct causation.

How this fits prior evidence

This meta-analysis extends previous evidence regarding nutrition-related laboratory biomarkers providing risk stratification for geriatric patients with hip fractures. It adds specific multidimensional metrics, such as the systemic immune-inflammation index and various nutritional indices (prognostic, geriatric, and ratio-based), to the existing toolkit of indicators like albumin and prealbumin for identifying high-risk patients.

A new analysis of 28,605 elderly patients with hip fractures suggests that certain blood tests, taken before surgery, could help identify who is more likely to have complications afterward. The study looked at markers of nutrition, inflammation, and immune function, such as the prognostic nutritional index and the neutrophil-to-lymphocyte ratio. These are simple tests that are often already available in hospitals.

The researchers found that patients with low scores on the prognostic nutritional index had more than three times the odds of short-term complications, while those with high neutrophil-to-lymphocyte ratios had more than five times the odds. Other markers, like the glucose-to-albumin ratio and the C-reactive protein to albumin ratio, were also linked to higher risk. The findings were similar for medium-to-long-term outcomes, with markers like the systemic immune-inflammation index and the geriatric nutritional risk index showing increased risk.

It's important to note that this is an observational meta-analysis, so it can only show links, not cause and effect. The study did not report on safety concerns or side effects, and the limitations were not listed. However, the evidence for these markers was rated as moderate to high certainty, meaning the results are fairly reliable.

For patients and families, this means that doctors might use these blood tests to better understand who needs extra care after hip fracture surgery. But this is not a reason to panic or to change any treatment plans on your own. Always talk to your doctor about what these results might mean for you or your loved one.

What this means for you:
Blood tests may help predict hip fracture surgery risks, but they are not a guarantee.

Common questions

What blood tests were studied?

The study looked at several blood tests that measure nutrition, inflammation, and immune function. These include the prognostic nutritional index, neutrophil-to-lymphocyte ratio, glucose-to-albumin ratio, C-reactive protein to albumin ratio, systemic immune-inflammation index, and geriatric nutritional risk index. These are all simple tests that can be done with a routine blood draw.

Who might benefit from these findings?

Elderly patients who have hip fractures and are preparing for surgery might benefit. The tests could help doctors identify who is at higher risk for complications after surgery, so they can plan extra monitoring or care. However, the study only shows a link, not that using these tests improves outcomes.

Are these tests safe?

The study did not report any safety concerns or side effects related to the tests themselves. These are standard blood tests that are commonly used in hospitals. However, the study did not provide information on risks or tolerability, so it's best to ask your doctor about any specific concerns.

How is this different from current practice?

Currently, doctors may not routinely use these specific markers to assess risk before hip fracture surgery. This analysis suggests that these tests could be useful tools for personalized risk screening. But the study does not prove that using them changes outcomes, so more research is needed before they become standard practice.

Study Details

Study typeMeta analysis
EvidenceLevel 1
PublishedAug 2026
View Original Abstract ↓
BackgroundThe high mortality and disability rates following hip fractures in the elderly have attracted widespread attention. Underlying inflammatory, immunological, nutritional, and metabolic imbalances are major contributing factors. However, the prognostic value of multidimensional composite biomarkers encompassing these dimensions remains unclear. This systematic review aimed to evaluate the prognostic value of these composite biomarkers for postoperative outcomes in elderly patients with hip fractures.MethodsA systematic search was conducted in PubMed, Web of Science, Embase, Scopus, the Cochrane Library, ProQuest, and ClinicalTrials.gov, with a cutoff date of 7 January 2026, to identify eligible cohort studies. Data were analyzed using random-effects models for both continuous and cutoff-based categorical variables. Sensitivity analyses were conducted using the modified Knapp-Hartung method with an ad hoc variance correction and a Bayesian hierarchical model. The quality of the evidence was assessed using the GRADE criteria.ResultsA meta-analysis was conducted, incorporating 46 cohort studies involving a total of 28,605 patients. The results showed that baseline immune-inflammatory, nutritional, and metabolic imbalances are associated with the risk of adverse postoperative outcomes. For short-term outcomes, among binary biomarkers, a low prognostic nutritional index (OR = 3.29, 95% CI: 2.22–4.88), a high neutrophil-to-lymphocyte ratio (OR = 5.17, 95% CI: 2.99–8.92), and a high glucose-to-albumin ratio (OR = 2.31, 95% CI: 1.86–2.88) constituted the core risk prognostic indicators. In the analysis of continuous variables, the prognostic nutritional index (OR = 1.09, 95% CI: 1.04–1.15), the C-reactive protein to albumin ratio (OR = 1.33, 95% CI: 1.19–1.47), and the neutrophil-to-lymphocyte ratio (OR = 1.08, 95% CI: 1.03–1.13) were also associated with an increased short-term risk. Among binary biomarkers evaluating the prognosis of medium-to-long-term adverse outcomes, in addition to the C-reactive protein to albumin ratio (OR = 3.19, 95% CI: 2.20–4.62) and the systemic immune-inflammation index (HR = 2.00, 95% CI: 1.37–2.91), the geriatric nutritional risk index (OR = 2.95, 95% CI: 1.94–4.48) also demonstrated medium-to-long-term prognostic value.ConclusionOverall, composite biomarkers of immunity, inflammation, nutrition, and metabolism demonstrate prognostic associations with short-term and medium-to-long-term adverse outcomes in older patients with hip fractures, with core prognostic indicators predominantly supported by moderate- to high-certainty evidence. These findings support the use of these multidimensional indicators as accessible and reliable assessment tools to assist clinicians in personalized perioperative risk screening and precision management.
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