Venous thromboembolism and mortality after hip fracture surgery: the ESCORTE study

Risk factors for urinary tract infection in geriatric hip fracture patients: a systematic review and meta-analysis

Background

Urinary tract infection (UTI) is a prevalent and consequential complication in hip fracture patients, leading to significant disability and heightened healthcare expenditures. Consequently, there is a critical need for a comprehensive systematic review to identify risk factors and establish early and effective preventive measures.

Methods

A comprehensive search was performed across the PubMed, Cochrane, Embase, Web of Science, and Scopus databases (up to August 31, 2023). Article screening, data extraction, and quality assessment were independently completed by two reviewers.

Results

Forty-four studies were eligible for inclusion, yielding an overall incidence rate of 11% (95% CI: 8%-14%). Our pooled analysis revealed 18 significant risk factors, including being female (OR = 2.23, 95% CI: 1.89-2.63), advanced age (MD = 1.35, 95% CI: 0.04-2.66), obesity (OR = 1.21, 95% CI: 1.11-1.31), catheterization (OR = 3.8, 95% CI: 2.29-6.32), blood transfusion (OR = 1.39, 95% CI: 1.21-1.58), American Society of Anesthesiologists ≥III (OR = 1.28, 95% CI: 1.18-1.40), general anesthesia (OR = 1.26, 95% CI: 1.11-1.43), intertrochanteric fracture (OR = 1.25, 95% CI: 1.01-1.54), hemiarthroplasty (OR = 1.43, 95% CI: 1.19-1.69), prolonged length of hospital stay (MD = 1.44, 95% CI: 0.66-2.23), delirium (OR = 2.66, 95% CI: 2.05-3.47), dementia (OR = 1.82, 95% CI: 1.62-2.06), Parkinson's disease (OR = 1.53, 95% CI: 1.46-1.61), diabetes (OR = 1.27, 95% CI: 1.13-1.43), hypertension (OR = 1.14, 95% CI: 1.03-1.26), congestive heart failure (OR = 1.35, 95% CI: 1.10-1.66), history of sepsis (OR = 7.13, 95% CI: 5.51-9.22), and chronic steroid use (OR = 1.29, 95% CI: 1.06-1.57).

Conclusion

Our study identifies numerous risk factors strongly associated with UTI, offering compelling evidence and actionable strategies for improving clinical prediction, enabling early intervention, and facilitating targeted UTI management.

Systematic review registration

identifier [CRD42023459600], https://www.crd.york.ac.uk/PROSPERO/display_record.php?RecordID=459600.

Incidence and risk factors for stroke after hip fracture: a meta-analysis

Hip fractures represent a high burden and are associated with mortality in up to 30% of the cases. Stroke complications can be devastating and increase mortality and disability in elderly patients. This study aimed to determine the overall incidence and risk factors for stroke in patients with hip fractures. A systematic search of the literature using PubMed, EMBASE, Scopus, and Cochrane Collaboration Library databases was carried out. Studies have reported the incidence of stroke in patients > 50 years of age with hip fractures. Data were extracted according to PRISMA guidelines (PROSPERO: CRD42023384742). Data were combined using Review Manager version 5.4. A random-effects model was adopted if a significant heterogeneity was observed. The primary outcome was the incidence of stroke in patients with hip fractures. The secondary outcomes of interest included the influence on the incidence of demographic factors, associated conditions, habits, and analytical parameters. Of the 635 initially retrieved studies, 18 were included, with 256,197 patients. The mean age of the patients ranged from 55 to 84 years old. The overall incidence of stroke in patients with hip fracture was 6.72% (95% CI 4.37-9.07%. The incidence of stroke by region was highest in the American continent (8.09%, 95% CI 3.60-12.58%; P > 0.001). Regarding associated conditions diabetes significantly increased the risk of stroke (OR 1.80, 95% CI 1.41-2.30). Respect to patient characteristics, BMI greater than 24.4 and female gender did not significantly increase the risk of stroke: (OR 1.07, 95% CI 0.74-1.56) and (OR 1.15, 95% CI 0.91-1.46). Lastly, lower albumin concentrations were a risk factor for stroke in patients with hip fracture (MD - 3.18, 95% CI - 4.06 to 2.31). In conclusion, the incidence of stroke after hip fracture was 6.72%. The incidence of stroke increases over time, and the closely associated risk factors are diabetes and low albumin level.

The impact of adopting low-molecular-weight heparin in place of aspirin as routine thromboprophylaxis for patients with hip fracture

PURPOSE OF THE STUDY

In 2010, the National Institute for Health and Care Excellence (NICE) recommended the use of anticoagulants rather than aspirin as pharmacological thromboprophylaxis after hip fracture. We examine the impact of implementing this change in guidance on the clinical incidence of deep vein thrombosis (DVT).

STUDY DESIGN

Demographic, radiographic and clinical data were retrospectively collected for 5039 patients admitted to a single tertiary centre in the UK for hip fracture between 2007 and 2017. We calculated rates of lower-limb DVT and examined the impact of the June 2010 change of departmental policy, from use of aspirin to use of low-molecular-weight heparins (LMWH) in hip fracture patients.

RESULTS

Doppler scans were performed in 400 patients in the 180 days after a hip fracture, and identified 40 ipsilateral and 14 contralateral DVTs (p<0.001). The rate of DVT reduced significantly following the 2010 change in departmental policy from aspirin to LMWH in these patients (1.62% vs 0.83%, p<0.05).

CONCLUSIONS

The rate of clinical DVT halved following the change from aspirin to LMWH for pharmacological thromboprophylaxis, but the number needed to treat was 127. A figure of <1% for the incidence of clinical DVT in a unit that routinely uses LMWH monotherapy following hip fracture provides a context for discussions of alternative strategies, and for power calculations for future research. These figures are important to policy makers and to researchers as they will inform the design of the comparative studies on thromboprophylaxis agents for which NICE has called.

Development of machine-learning algorithms for 90-day and one-year mortality prediction in the elderly with femoral neck fractures based on the HEALTH and FAITH trials

To develop prediction models using machine-learning (ML) algorithms for 90-day and one-year mortality prediction in femoral neck fracture (FNF) patients aged 50 years or older based on the Hip fracture Evaluation with Alternatives of Total Hip arthroplasty versus Hemiarthroplasty (HEALTH) and Fixation using Alternative Implants for the Treatment of Hip fractures (FAITH) trials. This study included 2,388 patients from the HEALTH and FAITH trials, with 90-day and one-year mortality proportions of 3.0% (71/2,388) and 6.4% (153/2,388), respectively. The mean age was 75.9 years (SD 10.8) and 65.9% of patients (1,574/2,388) were female. The algorithms included patient and injury characteristics. Six algorithms were developed, internally validated and evaluated across discrimination (c-statistic; discriminative ability between those with risk of mortality and those without), calibration (observed outcome compared to the predicted probability), and the Brier score (composite of discrimination and calibration). The developed algorithms distinguished between patients at high and low risk for 90-day and one-year mortality. The penalized logistic regression algorithm had the best performance metrics for both 90-day (c-statistic 0.80, calibration slope 0.95, calibration intercept -0.06, and Brier score 0.039) and one-year (c-statistic 0.76, calibration slope 0.86, calibration intercept -0.20, and Brier score 0.074) mortality prediction in the hold-out set. Using high-quality data, the ML-based prediction models accurately predicted 90-day and one-year mortality in patients aged 50 years or older with a FNF. The final models must be externally validated to assess generalizability to other populations, and prospectively evaluated in the process of shared decision-making.

Predictors of preoperative deep vein thrombosis in hip fractures: A systematic review and meta-analysis

BACKGROUND

The predictors of preoperative deep vein thrombosis (DVT) in patients with hip fractures remain unclear. Therefore, this study describes the results of a systematic review and meta-analysis of relevant peer-reviewed literature on this topic.

METHODS

We searched PubMed, Google Scholar, Cochrane Library, Web of Science, and MEDLINE for articles published in English on the predictors of preoperative DVT in hip fractures. We calculated pooled odds ratios (OR) or mean differences (MD) for the DVT groups as compared with the non-DVT groups for each variable, including gender, age, body mass index, injury side, current smoking status, time from injury to admission, time from injury to surgery, fracture type, hypertension, arrhythmia, coronary artery disease, diabetes, stroke, kidney disease, liver disease, lung disease, malignancy, rheumatoid arthritis, D-dimer, fibrinogen, activated partial thromboplastin time, prothrombin time, thrombin time, hemoglobin, albumin, total cholesterol, and triglycerides.

RESULTS

We included 9 studies involving 3,123 Asian patients with hip fractures (DVT, n = 570; non-DVT, n = 2,553). Being female (OR = 1.27; 95% confidence interval [CI] 1.04-1.56; p = 0.02), being of advanced age (MD = 1.63; 95% CI 0.80-2.47; p = 0.0001), having a longer time from injury to admission (MD = 0.80; 95% CI 0.48-1.12; p < 0.00001), having a longer time from injury to surgery (MD = 2.20; 95% CI 1.53-2.88; p < 0.00001), and the presence of kidney disease (OR = 1.76; 95% CI 1.04-2.96; p = 0.03) were correlated with a high risk of DVT. However, we found no significant differences between the two groups in the other predictors.

CONCLUSIONS

Evidence indicates that being female, being of advanced age, having a longer time from injury to admission, having a longer time from injury to surgery, and having kidney disease are significantly correlated with a high risk of preoperative DVT in Asian patients with hip fracture. Further investigations with patients of other ethnicities are required.

Does Hip Fracture Admitting Service Affect Proper Deep Venous Thrombosis Prophylaxis? An Investigation at a Level 1 Trauma Center

OBJECTIVE

To examine if rates of appropriate thromboprophylaxis prescribing at the time of discharge would be higher in patients admitted to the orthopaedic service. Second, to see if improvements could be made in the rates of these missed events after a structured intervention.

DESIGN

Retrospective Cohort Study, Prospective Interventional.

SETTING

Level 1 Academic Hospital.

PATIENTS

Two hundred forty-six patients undergoing a hip hemiarthroplasty for femoral neck fracture discharged to an extended care facility.

INTERVENTION

A letter was sent to the internal quality control committee detailing our preintervention study.

MAIN OUTCOME MEASURE

We looked at the differences among admitting services for missed thromboembolic prophylaxis (TPx) at the time of hospital discharge and rates of appropriate TPx after a structured intervention.

RESULTS

No statistically significant differences existed in relation to patient age, gender, body mass index, or postoperative discharge day in the preintervention group. Orthopaedic surgery prescribed adequate TPx at discharge for 76 of 77 patients (98.7%), general trauma surgery for 26 of 30 patients (86.7%), and internal medicine for 85 of 96 patients (86.7%) in the preintervention group. There was a statistically significant difference when comparing adequate TPx between orthopaedic surgery and other services (P < 0.013 and <0.021, respectively). Our postintervention data found a significant decrease in the rates of missed TPx on discharge. In our preintervention sample group compared with our postintervention sample group, we saw a decrease in missed TPx of 5/39 versus 0/43 events (P = 0.021).

CONCLUSIONS

We found that a letter sent to all members of a hospital internal quality committee decreased incidences of missed TPx. Specifically, this letter explained the details of our study that kept track of rates of missed TPx among different admitting services. We found that after our intervention, which consisted of a letter and a multidisciplinary discussion, the rate of missed thromboembolic prophylaxis events improved from 5/39 (12%) to 0/43 (0%) (P = 0.021).

LEVEL OF EVIDENCE

Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

Multidisciplinary care model for geriatric patients with hip fracture in Japan: 5-year experience

INTRODUCTION

Japan is a super-aging society, the geriatric care system establishment for hip fractures is at an urgent task. This report described our concept of multidisciplinary care model for geriatric hip fractures and 5-year outcomes at the Toyama City Hospital, Japan.

METHODS

In this retrospective cohort study, a multidisciplinary treatment approach was applied for elderly patients with hip fracture since 2014. These patients (n = 678, males: n = 143, mean age: 84.6 ± 7.5 years), were treated per the multidisciplinary care model. Time to surgery, length of hospital stays, complications, osteoporosis treatment, mortality, and medical costs were evaluated.

RESULTS

The mean time to surgery was 1.7 days. Overall, 78.0% patients underwent surgery within 2 days. The mean duration of hospital stay was 21.0 ± 12.4 days. The most frequent complication was deep venous thrombosis (19.0%) followed by dysuria (14.5%). Severe complications were pneumonia 3.4%, heart failure 0.8% and pulmonary embolism 0.4%. The in-hospital mortality rate was 1.2%. The 90-day, 6-month, and 1-year mortality rates were 2.5%, 6.7%, and 12.6%, respectively. The pharmacotherapy rate for osteoporosis at discharge was 90.7%, and the continuation pharmacotherapy rate was 84.7% at 1-year follow-up. The total hospitalization medical cost per person was lower than about 400 other hospitals' average costs every year, totaled 14% less during the 5-year study period.

CONCLUSION

We have organized a multidisciplinary team approach for geriatric hip fracture. This approach resulted in a shorter time to surgery and hospital stay than the national average. The incidence of severe complications and mortality was low. The multidisciplinary treatment has maintained a high rate of osteoporosis treatment after discharge and at follow-up. Furthermore, the total medical cost per person was less than the national average. Thus, the multidisciplinary treatment approach for geriatric hip fractures was effective and feasible to conduct in Japan.

The risk of venous thromboembolism in surgically treated hip fracture: A retrospective cohort study of 5184 patients

INTRODUCTION

Elderly patients undergoing surgery for a hip fracture are at risk of venous thromboembolism (VTE). The known risk of VTE is low due to thromboprophylaxis (1.8-2.5% at three months). Most previous studies have ignored the high mortality in that population when calculating the risk of VTE. Hip fracture treatment has also evolved over the last decade. The real risk of VTE today is unknown. We asked what was the risk of symptomatic VTE following surgery for a hip fracture in an elderly population. We also asked what kind of bleeding events were associated with thromboprophylaxis.

HYPOTHESIS

The risk of VTE will be lower than previously described due to modern postoperative care.

PATIENTS AND METHODS

Retrospective cohort study of all patients≥65-years-old undergoing surgery for a hip fracture in two Canadian academic centers, between January 1, 2008, and January 1, 2019. Symptomatic VTE (pulmonary embolism or deep venous thrombosis) confirmed by imagery were assessed. The follow-up was fixed at 3 months. The cumulated risks of VTE and bleeding events were calculated using the Kaplan-Meier estimator and a logistic regression model was used to determine risk factors.

RESULTS

The cohort included 5184 patients. The mean age was 83±8 years old and 76% of patients were female. In total, 98.8% of this cohort received postoperative thromboprophylaxis. Low-molecular-weight heparin was given for 35 days in 87% of this cohort. The risk of venous thromboembolism was 4.7±0.5% at 3 months (n=144). Chronic obstructive pulmonary disease (odds ratio 1.6 [1.0-2.4]) and the use of warfarin as extended thromboprophylaxis (odds ratio 2.1 [1.3-3.6]) were associated with venous thromboembolism. The risk of bleeding was 5.9% (n=179) at 3 months. In total, 78% (n=141) of bleeding events were hematomas, of which only 12% (n=16) needed reoperation. The use of direct oral anticoagulant was associated with an increased risk of bleeding events (odds ratio, 2.8 [1.5-5.0]). Mortality at 3 months was 8.4%.

DISCUSSION

The risk of venous thromboembolism is higher than expected in a population treated for this condition (4.7% vs. 1.8-2.5% at 3 months as previously described). Bleeding events were mostly hematomas and few needed reoperations for wound complication. Future research should focus on the management of thromboprophylaxis in that population.

LEVEL OF EVIDENCE

III; retrospective cohort study.

Orthogeriatric co-management for the care of older subjects with hip fracture: recommendations from an Italian intersociety consensus

BACKGROUND

Health outcomes of older subjects with hip fracture (HF) may be negatively influenced by multiple comorbidities and frailty. An integrated multidisciplinary approach (i.e. the orthogeriatric model) is, therefore, highly recommended, but its implementation in clinical practice suffers from the lack of shared management protocols and poor awareness of the problem. The present consensus document has been implemented to address these issues.

AIM

To develop evidence-based recommendations for the orthogeriatric co-management of older subjects with HF.

METHODS

A 20-member Expert Task Force of geriatricians, orthopaedics, anaesthesiologists, physiatrists, physiotherapists and general practitioners was established to develop evidence-based recommendations for the pre-, peri-, intra- and postoperative care of older in-patients (≥ 65 years) with HF. A modified Delphi approach was used to achieve consensus, and the U.S. Preventive Services Task Force system was used to rate the strength of recommendations and the quality of evidence.

RESULTS

A total of 120 recommendations were proposed, covering 32 clinical topics and concerning preoperative evaluation (11 topics), perioperative (8 topics) and intraoperative (3 topics) management, and postoperative care (10 topics).

CONCLUSION

These recommendations should ease and promote the multidisciplinary management of older subjects with HF by integrating the expertise of different specialists. By providing a convenient list of topics of interest, they might assist in identifying unmet needs and research priorities.

Safety of early surgery for geriatric hip fracture patients taking clopidogrel: a retrospective case-control study of 120 patients in China

Background:

Geriatric hip fracture patients receiving clopidogrel are a surgical challenge. In China, most of these patients undergo delayed surgical treatment after clopidogrel withdrawal for at least 5 to 7 days. However, delayed surgery is associated with increased complications and mortality in the older adults. This retrospective paralleled comparison study investigated the safety of early surgery for geriatric hip fracture patients within 5 days of clopidogrel withdrawal.

Methods:

Acute hip fracture patients (≥65 years) who were hospitalized in the orthogeriatric co-management ward of Beijing Jishuitan Hospital between November 2016 and April 2018 were retrospectively reviewed. Sixty patients taking clopidogrel before injury and discontinued <5 days before surgery constituted the clopidogrel group. The control group constituted 60 patients not taking antiplatelet or anticoagulant drugs and matched 1:1 with the clopidogrel group for sex, fracture type, operative procedure, and time from injury to operation (±10 h). The primary outcome was perioperative blood loss and the secondary outcomes were transfusion requirement, complications, and mortality. The Student's t test or Wilcoxon signed rank sum test was used for continuous variables and the Chi-square test was used for categorical variables.

Results:

Age, body mass index, American Society of Anesthesiologists score, and percentage undergoing general anesthesia were comparable between the groups (P > 0.050). The percentages of patients with coronary heart disease (61.7% vs. 18.3%; P < 0.001) and cerebrovascular disease (45.0% vs. 15.0%; P < 0.010) were significantly higher in the clopidogrel vs. control groups, respectively. The median clopidogrel discontinuation time before operation was 73.0 (range: 3.0–120.0) h. There was no significant difference in the estimated perioperative blood loss between the clopidogrel group (median: 745 mL) and control group (median: 772 mL) (P = 0.866). The intra-operative transfusion rate was higher in the clopidogrel group (22/60, 36.7%) than that in the control group (12/60, 20.0%) (P < 0.050). However, there was no significant difference in the blood transfusion rate during the entire perioperative period (26/60, 43.3% vs. 20/60, 33.3%; clopidogrel group vs. control group, respectively; P > 0.050). There was no significant difference in perioperative complications, and 30-day and 1-year mortality rates between the groups.

Conclusions:

Early hip fracture surgery is safe for elderly patients within 5 days of clopidogrel withdrawal, without increased perioperative blood loss, transfusion requirement, complications, and mortality compared with patients not taking antiplatelet drugs.

Nomogram for Predicting Deep Venous Thrombosis in Lower Extremity Fractures

Deep venous thrombosis (DVT) is a common complication in patients with lower extremity fractures, causing delays in recovery short-term and possible impacts on quality of life long-term. Early prediction and prevention of thrombosis can effectively reduce patient pain while improving outcomes. Although research on the risk factors for thrombosis is prevalent, there is a stark lack of clinical predictive models for DVT occurrence specifically in patients with lower limb fractures. In this study, we aim to propose a new thrombus prediction model for lower extremity fracture patients. Data from 3300 patients with lower limb fractures were collected from Wuhan Union Hospital and Hebei Third Hospital, China. Patients who met our inclusion criteria were divided into a thrombosis and a nonthrombosis group. A multivariate logistic regression analysis was carried out to identify predictors with obvious effects, and the corresponding formulas were used to establish the model. Model performance was evaluated using a discrimination and correction curve. 2662 patients were included in the regression analysis, with 1666 in the thrombosis group and 996 in the nonthrombosis group. Predictive factors included age, Body Mass Index (BMI), fracture-fixation types, energy of impact at the time of injury, blood transfusion during hospitalization, and use of anticoagulant drugs. The discriminative ability of the model was verified using the C-statistic (0.676). For the convenience of clinical use, a score table and nomogram were compiled. Data from two centers were used to establish a novel thrombus prediction model specific for patients with lower limb fractures, with verified predictive ability.

Safety and efficacy of a strategy of vitamin K antagonist reversal with prothrombin complex concentrates compared to vitamin K in patients with hip fracture

Background:

Increased preoperative delay in patients with hip fractures may be responsible for increased morbidity and mortality. We hypothesized that a strategy of reversal of vitamin K antagonist (VKA) by prothrombin complexes concentrates (PCCs), as compared to vitamin K, is safe and reduces preoperative delay and hospital length of stay (LOS).

Methods:

In this pilot study, we reviewed the records of patients admitted to a university-affiliated hospital for hip fracture between Jan. 1, 2012, and Dec. 31, 2016, who were taking VKA. Patients were stratified according to reversal strategy (vitamin K v. PCC). Adverse effects, time to surgery, LOS and mortality were collected from the electronic medical record and were compared between the 2 study groups and a control group not treated with VKA.

Results:

A total of 141 patients were included in the study: 65 in the vitamin K group, 26 in the PCC group and 50 in the control group. The median preoperative delay in the PCC group (20 h [interquartile range (IQR)] 13–25 h]) and the control group (20 h [IQR 15–33 h]) was lower than that in the vitamin K group (45 h [IQR 31–52 h]) (p < 0.001). Patients in the PCC group had a shorter median hospital LOS than those in the vitamin K group (6 d [IQR 4–9 d] v. 8 d [IQR 6–11 d], p < 0.05). No difference was observed in the proportion of patients who received a red blood cell transfusion, or had thrombotic or hemorrhagic complications. No difference in mortality at 12 months was observed between the groups.

Conclusion:

In patients with hip fracture, the use of PCCs as compared to vitamin K to reverse the effect of VKA significantly reduced preoperative delay and hospital LOS, and was not associated with an increase in the rates of thrombotic or hemorrhagic complications. Prospective studies involving a greater number of patients are required to confirm these promising results.

Identification of hypercoagulability with thrombelastography in patients with hip fracture receiving thromboprophylaxis

Background:

Venous thromboembolism (VTE) is the second most common complication after hip fracture surgery. We used thrombelastography (TEG), a wholeblood, point-of-care test that can provide an overview of the clotting process, to determine the duration of hypercoagulability after hip fracture surgery.

Methods:

In this prospective study, consecutive patients aged 51 years or more with hip fractures (trochanteric region or neck) amenable to surgical treatment who presented to the emergency department were eligible for enrolment. Thrombelastography, including calculation of the coagulation index (CI) (combination of 4 TEG parameters for an overall assessment of coagulation) was performed daily from admission until 5 days postoperatively, and at 2 and 6 weeks postoperatively. All patients received 28 days of thromboprophylaxis. We used single-sample t tests to compare mean maximal amplitude (MA) values (a measure of clot strength) to the hypercoagulable threshold of greater than 65 mm, a predictor of in-hospital VTE.

Results:

Of the 35 patients enrolled, 11 (31%) were hypercoagulable on admission based on an MA value greater than 65 mm, and 29 (83%) were hypercoagulable based on a CI value greater than 3.0; the corresponding values at 6 weeks were 23 (66%) and 34 (97%). All patients had an MA value greater than 65 mm at 2 weeks. Patients demonstrated normal coagulation on admission (mean MA value 62.2 mm [standard deviation (SD) 6.3 mm], p = 0.01) but became significantly hypercoagulable at 2 weeks (mean 71.6 mm [SD 2.6 mm], p < 0.001). There was a trend toward persistent hypercoagulability at 6 weeks (mean MA value 66.2 mm [SD 3.8 mm], p = 0.06).

Conclusion:

More than 50% of patients remained hypercoagulable 6 weeks after fracture despite thromboprophylaxis. Thrombelastography MA thresholds or a change in MA over time may help predict VTE risk; however, further study is needed.

Is preoperative balloon aortic valvuloplasty of interest for severe aortic stenosis in hip fracture surgery?

PURPOSE

In elderly patients, the discovery and management of a severe aortic stenosis (AS) prior to emergency non-cardiac surgery is a frequent and controversial issue. The objective of this study was to evaluate preoperative balloon aortic valvuloplasty (BAV) for severe AS in hip fracture surgery.

METHODS

We conducted an observational, monocentric, retrospective study from 2011 to 2018. Survival (30-day, 90-day and 180-day mortality) and the occurrence of perioperative complications were analyzed and compared between control (i.e. no BAV prior to surgery) and preoperative BAV groups in patients with hip fracture surgery and a formal transthoracic echocardiographic diagnosis of severe AS (aortic valve area < 1 cm²). Patients' allocation to the intervention and control groups was after a discussion between cardiologist, anesthesiologist and the surgeon.

RESULTS

Among the 8506 patients who underwent hip fracture surgery, 29 patients in the control group and 30 patients in the BAV group were finally included. Kaplan-Meier survival analysis demonstrated a significant decrease in mortality in the BAV group (p=0.014) despite an increase in median time to operation of about 48 hours (p<0.0001). Multivariate analysis (stepwise logistic regression) showed that postoperative delirium (OR [95%CI]: 17.5 [1.8-168]; p=0.013) and postoperative acute congestive heart failure (OR [95%CI]: 59.4 [5.0-711.1]; p=0.0013) were predictive factors of 30-day mortality with an area under ROC curve of 0.90 (95%CI: 0.80-0.97; p<0.0001).

CONCLUSIONS

preoperative BAV for severe AS could reduce the mortality of hip fracture patients despite an increase in time to operation. This improved survival could be linked to the decrease in cardiologic and neurologic adverse events. A larger prospective randomized study is necessary before generalizing our results.

A novel machine-learning algorithm for predicting mortality risk after hip fracture surgery

INTRODUCTION

Although several risk stratification models have been developed to predict hip fracture mortality, efforts are still being placed in this area. Our aim is to (1) construct a risk prediction model for long-term mortality after hip fracture utilizing the RSF method and (2) to evaluate the changing effects over time of individual pre- and post-treatment variables on predicting mortality.

METHODS

1330 hip fracture surgical patients were included. Forty-five admission and in-hospital variables were analyzed as potential predictors of all-cause mortality. A random survival forest (RSF) algorithm was applied in predictors identification. Cox regression models were then constructed. Sensitivity analyses and internal validation were performed to assess the performance of each model. C statistics were calculated and model calibrations were further assessed.

RESULTS

Our machine-learning RSF algorithm achieved a c statistic of 0.83 for 30-day prediction and 0.75 for 1-year mortality. Additionally, a COX model was also constructed by using the variables selected by RSF, c statistics were shown as 0.75 and 0.72 when applying in 2-year and 4-year mortality prediction. The presence of post-operative complications remained as the strongest risk factor for both short- and long-term mortality. Variables including fracture location, high serum creatinine, age, hypertension, anemia, ASA, hypoproteinemia, abnormal BUN, and RDW became more important as the length of follow-up increased.

CONCLUSION

The RSF machine-learning algorithm represents a novel approach to identify important risk factors and a risk stratification models for patients undergoing hip fracture surgery is built through this approach to identify those at high risk of long-term mortality.

Venous Thromboembolism in Major Orthopedic Surgery

Venous thromboembolism (VTE) is one of the most important complications in orthopedic surgery. Deep-vein thrombosis occurs frequently after surgery but has few clinical symptoms. The emboli formed may cause pulmonary thromboembolism, which is associated with a high mortality rate. The cost of medical care is doubled when VTE develops after surgery. Thus, it is imperative to focus on preventing VTE after major orthopedic surgery. The prevention method should be selected after considering the balance between VTE risk and bleeding risk attributable to drug prophylaxis. Physical prophylaxis, drug prophylaxis, or both should be selected. When performing VTE prophylaxis, the risks and merits of prophylaxis must be made clear to patients.

Venous Thromboembolism in Hip Fracture Patients: A Subanalysis of the FAITH and HEALTH Trials

BACKGROUND

The primary objective of this study was to determine the incidence of symptomatic venous thromboembolism (VTE), including pulmonary embolism (PE) and deep vein thrombosis (DVT), in the hip fracture population. Secondary objectives included determining timing of VTE diagnosis, VTE thromboprophylaxis given, and identifying any factors associated with VTE.

METHODS

Using data from the FAITH and HEALTH trials, the incidence of VTE, including DVT and PE, and the timing of VTE were determined. A multivariable Cox regression analysis was used to determine which factors were associated with increased risk of VTE, including age, treatment for comorbidity, thromboprophylaxis, time to surgery, and method of fracture management.

RESULTS

2520 hip fracture patients were included in the analysis. Sixty-four patients (2.5%) had a VTE [DVT: 36 (1.4%), PE: 28 (1.1%)]. Thirty-five (54.7%) were diagnosed less than 6 weeks postfracture and 29 (45.3%) more than 6 weeks postfracture. One thousand nine hundred ninety-three (79%) patients received thromboprophylaxis preoperatively and 2502 (99%) received thromboprophylaxis postoperatively. The most common method of preoperative (46%) and postoperative (73%) thromboprophylaxis was low molecular weight heparin. Treatment with arthroplasty compared to internal fixation was the only variable associated with increased risk of VTE (hazard ratio 2.67, P = 0.02).

CONCLUSIONS

The incidence of symptomatic VTE in hip fracture patients recruited to the 2 trials was 2.5%. Although over half of the cases were diagnosed within 6 weeks of fracture, VTE is still prevalent after this period. The majority of patients received thromboprophylaxis. Treatment with arthroplasty rather than fixation was associated with increased incidence of VTE.

LEVEL OF EVIDENCE

Therapeutic Level II. See Instructions for Authors for a complete description of levels of evidence.

Hip Fracture Leads to Transitory Immune Imprint in Older Patients

Background: Hip fracture (HF) is common in the geriatric population and is associated with a poor vital and functional prognosis which could be impacted by immunological changes. The objective here is to decipher immune changes occurring in the 1st days following HF and determine how phenotype, function, and regulation of innate and adaptive compartments adapt during acute stress event.

Methods: We included HF patients, aged over 75 years. For each patient, blood samples were taken at five different timepoints: four in the perioperative period (day 0 to hospital discharge) and one at long term (6–12 months). Phenotypical and functional analysis were performed longitudinally on fresh blood or cryopreserved PBMCs. Clinical data were prospectively collected.

Results: One-hundred HF patients and 60 age-matched controls were included. Innate compartment exhibits pro-inflammatory phenotypes (hyperleukocytosis, increase of CD14+ CD16+ proportion and CCR2 expression), maintaining its ability to produce pro-inflammatory cytokines. Adaptive compartment extends toward a transitory immunosuppressive profile (leucopenia) associated with an active T-cell proliferation. Furthermore, increases of LAG-3 and PD-1 and a decrease of 2-B4 expression are observed on T-cells, reinforcing their transitory suppressive status. Of note, these immune changes are transitory and sequential but may participate to a regulation loop necessary for homeostatic immune control at long term.

Conclusion: HF is associated with several transitory immunological changes including pro-inflammatory phenotype in innate compartment and immunosuppressive profile in adaptive compartment. A comprehensive assessment of immune mechanisms implicated in the patient's prognosis after HF could pave the way to develop new immune therapeutics strategies.

Complications following hip fracture: Results from the World Hip Trauma Evaluation cohort study

INTRODUCTION

Hip fractures are common in people over 60 years of age, and are associated with significant disability, morbidity and mortality. The aim of this study was to record the incidence of complications in the first 120 days following hip fracture.

METHODS

The World Hip Trauma Evaluation (WHiTE) study is a multicentre, prospective cohort study conducted in National Health Service (NHS) hospitals in England and Wales. Participants are 60 years and older who received operative treatment for a hip fracture. We report the incidence of complications recorded by hospital staff until discharge from hospital and by participants at 120-days post-surgery.

RESULTS

An analysis of 8673 consecutive participants enrolled in the WHiTE study revealed the following risks of complications within the first 120 days: signs of wound infection (3.1%); dislocation (0.5%); failure of fixation (0.6%); peri‑prosthetic fracture (0.3%); overall revision surgery (0.9%); blood loss requiring transfusion (6.1%); chest infection (6.3%); urinary tract infection (5.0%); deep vein thrombosis/pulmonary embolus (1.8%); cerebrovascular accident (0.6%); acute coronary syndrome/myocardial infarction (0.6%); acute kidney injury (1.3%).

CONCLUSION

The rates of complications reported here provide a reference range against which future studies might be assessed. Registration: ISRCTN63982700.

Development and validation of the Brabant Hip Fracture Score for 30-day and 1-year mortality

BACKGROUND

Hip fractures in the elderly are associated with advanced comorbidities and high mortality rates. Mortality prediction models can support clinicians in tailoring treatment for medical decision making in frail elderly patients. The aim of this study was to develop and internally validate the Brabant Hip Fracture Score, for 30-day (BHFS-30) and 1-year mortality (BHFS-365) after hip fracture.

MATERIAL AND METHODS

A cohort study was conducted in 2 hospitals on operatively treated patients of 65 years and older with a hip fracture. Manual backward multivariable logistic regression was used to select independent predictors of 30-day and 1-year mortality. Internal validation was performed using bootstrapping techniques. Model performance was assessed with: (1) discrimination via the area under the receiver operating characteristic curve (AUC); (2) explained variance via Nagelkerke's R²; (3) calibration via Hosmer-Lemeshow (H&L) test and calibration plots.

RESULTS

Independent predictors of 30-day mortality were: age, gender, living in an institution, Hb, respiratory disease, diabetes and malignancy. In addition, cognitive frailty and renal insufficiency, were selected in the BHFS-365. Both models showed acceptable discrimination after internal validation (AUC = 0.71 and 0.75). The Hosmer-Lemeshow test indicated no lack of fit (p > 0.05).

DISCUSSION

We demonstrated that the internally validated and easy to use BHFS in surgically treated elderly patients after a hip fracture showed acceptable discrimination and adequate calibration. In clinical practice a cutoff of BHFS-30 ⩾ 24 could identify frail elderly patients at high risk for early mortality and could support clinicians, patients and families in tailoring treatment for medical decision making.

Arterial and venous thrombosis: What's the link? A narrative review

Arterial thrombosis and venous thromboembolism (VTE) are traditionally considered two different entities. However, patients with unprovoked VTE are at higher risk of developing subclinical and overt atherosclerosis compared to healthy controls challenging these distinctions. Obesity may explain the association between arterial and venous disease: overweight/obese patients are prone to stasis in lower limbs veins, chronic inflammation, dyslipidemia, hypertension, and diabetes mellitus; all of which result in a hypercoagulability, VTE, and atherosclerosis. Novel therapeutic approaches combining and re-purposing traditional arterial therapies (antiplatelets and statins) and venous thrombosis therapies (anticoagulants) are emerging for the management of patients with vascular disease.

Preoperative anemia and total hospitalization time are the independent factors of preoperative deep venous thromboembolism in Chinese elderly undergoing hip surgery

Background

This study was designed to explore the prevalence and risk factors of preoperative deep venous thromboembolism (DVT) in Chinese elderly with hip fracture.

Methods

From January 1, 2012, to December 31, 2018, 273 elderly patients over 70 years old with elective hip surgery were collected from the electronic medical records. Collected data included demographic characteristics, comorbidities, ASA classification, types of previous operations, types of anesthesia, operation time, fracture to operation time, preoperative hemoglobin level, anemia, blood-gas analysis, cardiac function, whether transfusion, preoperative hospitalization, postoperative hospitalization, electrocardiograph, lower limb venous ultrasonography and total hospitalization time.

Results

In these 273 patients, 15(5.6%) had ultrasonography evidence of DVT in affected limbs before surgery. Three of all patients received an temporary inferior vena cave filter placement preoperatively. Fracture to surgery time, preoperative hemoglobin level, anemia, preoperative hospitalization, pulmonary disease and total hospitalization time were statistically different between DVT group and non-DVT group (P < 0.05 for all). Moreover, preoperative anemia (OR: 0.144, 95%CI: 0.026–0.799, P = 0.027) and total hospitalization time (OR: 1.135; 95%CI: 1.023–1.259, P = 0.017) were the two independent risk factors for preoperative DVT.

Conclusion

Preoperative anemia and total hospitalization time were independent risk factors for venous DVT in Chinese elderly with hip fracture.

The Incremental Cost of Inpatient Venous Thromboembolism After Hip Fracture Surgery

OBJECTIVES

To (1) identify trends in the rates of deep venous thrombosis (DVT) and pulmonary embolism (PE) and (2) calculate the additional incremental inpatient cost and length of stay associated with venous thromboembolism (VTE) after hip fracture surgery.

DESIGN

Retrospective database analysis.

SETTING

Hospital discharge data.

PATIENTS/PARTICIPANTS

A total of 838,054 patients undergoing operative treatment of hip fractures in the National Inpatient Sample from 2003 to 2014.

INTERVENTION

Internal fixation or partial/total hip replacement.

MAIN OUTCOME MEASURES

The length of stay and cost of hospitalization were compared between patients with VTE and those without using a Student t-test. A logistic regression model was performed to evaluate the trends in VTE rates, and a multivariable linear regression model was performed to evaluate inpatient hospital costs.

RESULTS

The overall rates of DVT and PE were 0.3% and 0.53%, respectively. VTE was associated with an increased length of stay (9 days vs. 5 days) and increased inpatient cost ($103,860.83 vs. $51,576.00). The rate of DVT over the study period decreased, whereas the rate of PE increased.

CONCLUSIONS

Each episode of VTE after hip fracture is a significant source of additional inpatient cost. Patients who sustain a VTE have approximately twice the length of stay and total inpatient cost compared with those who do not. The rates of DVT after hip fracture surgery are decreasing, whereas the rates of PE are increasing.

LEVEL OF EVIDENCE

Prognostic Level III. See Instructions for Authors for a complete description of levels of evidence.

Predictors of Poor Quality of Life after Primary Lower Limb Deep Venous Thrombosis: A Perspective from a Developing Nation

Objective: We aimed to determine predictors of poor long term quality of life, using the VEINES Quality of Life (QOL) questionnaire, in patients with lower limb deep venous thrombosis (DVT).

Material and Methods: This study included adult patients with primary lower limb DVT between January 2007 and December 2017. Post thrombotic syndrome (PTS) was assessed using the Villalta score and Quality of Life (QoL) by the VEINES quality of life questionnaire.

Results: Our study included 125 patients, 57 (45.6%) of whom were males. The patient population’s median age was 41 years (IQR: 34–47 years). The median follow up was 450 days (IQR: 390–1020 days). PTS occurred in 49 (39.2%) patients. Independent predictors of poor quality of life post DVT were progression to PTS, complete occlusion of vein, proximal (Ileofemoral) DVT, poor control of INR, poor compliance with compression stockings, severity of PTS, ileofemoral DVT and poor control of therapeutic anticoagulation.

Conclusion: Predictors who are independently associated with poor quality of life post DVT are PTS, inability to maintain therapeutic anticoagulation and ileofemoral DVT.

Safety of early orthopedic surgery in patients with intermediate/low- or low-risk pulmonary embolism

Background

Preoperative pulmonary embolism (PE) is one of the comorbidities in patients with hip fracture. However, previous studies have not identified the optimal timing of surgery in these patients, who might require early surgery. This study aimed to investigate the safety and clinical feasibility of early surgery in patients with hip fracture and acute PE.

Methods

The medical records of 156 patients with hip fracture, who were suspected to have PE and underwent pulmonary computed tomography angiography at Asan Medical Center from January 2008 to December 2017, were retrospectively reviewed. After excluding patients who were diagnosed with PE during the postoperative period, the baseline characteristics and clinical course were compared between patients preoperatively diagnosed with PE (PE group) and patients without PE during the hospital stay (non-PE group). Adverse outcomes were evaluated during 3 months postoperatively.

Results

The baseline characteristics were not different between the PE group (n=90) and the non-PE group (n=50). All patients in the PE group were classified as having an intermediate/low or low risk according to the European Society of Cardiology guidelines and underwent surgery within 30 days after the PE diagnosis (median duration: 2 days). None of the patients in both groups developed symptomatic venous thromboembolism (VTE) during the follow-up. Moreover, there were no statistically significant differences in major bleeding, clinically relevant nonmajor (CRNM) bleeding, transfusion amount, bleeding site, and length of hospital stay between the PE and non-PE groups.

Conclusions

Our results suggest that early surgery might be a reasonable treatment option in patients with hip fracture and acute PE.

Venous thromboembolism rates after hip and knee arthroplasty and hip fractures

BACKGROUND

The ideal thromboprophylaxis regime following lower limb arthroplasty and proximal femur fractures remains controversial. Guidelines disagree on the type of chemical prophylaxis, its dose or duration. This article describes a method of monitoring venous thromboembolism (VTE) rates following Total Hip (THA), Total Knee Arthroplasty (TKA) and surgery for hip fractures (NOF#).

METHODS

Over 3 years, all patients investigated for VTE were analysed using Picture Archiving Communications System (PACS). All positive scans were then cross-referenced using PACS and local registry data to see if they had undergone THA, TKA or NOF# in the preceding 90 days. Mortality data were obtained from the national administrative database, Hospital Episode Statistics.

RESULTS

Five thousand seven hundred eighty-eight patients underwent investigation for VTE and there were 29 diagnoses of PE and 24 of DVT. There was a 0.77% rate of symptomatic DVT after THA, 0.05% after TKA and 0.55% after NOF #. The rate of confirmed symptomatic PE for THA was 0.46, 0.27% for TKA and 0.96% for NOF #. Mortality at one-year post-THA was 0.6, 0.6% for TKA and 25.9% after NOF#. All patients contacted either remained within the catchment area for the minimum 90 postoperative days or died within the catchment area.

CONCLUSIONS

The 90 day post-operative prevalence of symptomatic VTE of 1.2, 0.3 and 1.5% in THA, TKA and NOF # respectively are similar to other studies using symptomatic and imaging positive VTE as their endpoint. The study uses a method of collecting data which can be utilised in centres where PACS is available.

Direct Oral Anticoagulants in the Prevention of Venous Thromboembolism Following Surgery for Hip Fracture in Older Adults: A Population-Based Cohort Study

Introduction

Direct oral anticoagulants (DOACs) decrease the risk of venous thromboembolism (VTE) without increasing the risk of hemorrhage in elective lower limb orthopedic surgery. However, the role of DOACs in preventing VTE following hip fracture surgery in the older adults remains unclear. This study aims to evaluate the efficacy and safety of DOACs in older adults undergoing surgery for hip fracture.

Materials and methods

Single-center, retrospective, population-based cohort study of patients receiving either a DOAC or low-molecular-weight heparin (LMWH) for VTE prophylaxis following hip fracture surgery. Data obtained included patient demographics, comorbidities, fracture classification, time to surgery, procedure performed, and length of stay. Main outcomes assessed were incidence of VTE, incidence of major hemorrhage, and death within 30 days of surgery.

Results

A total of 321 patients were included. Incidence of VTE was 0% in the DOAC group and 3.4% in the LMWH group (risk ratio [RR]:0.26, 95% confidence interval [CI]: 0.02-4.34, P = .35). Hemorrhage occurred in 7.4% and 3.0% of patients in the DOAC and LMWH groups, respectively (RR: 2.47, 95% CI: 0.77-7.91, P = .13). Mortality from VTE was 0% in the DOAC group and 0.7% in the LMWH group (RR: 0.97, 95% CI: 0.05-20.02, P = .99). Mortality from hemorrhage was 1.9% in the DOAC group and 0.7% in the LMWH group (RR: 2.47, 95% CI: 0.23-26.78, P = .46).

Discussion

The use of DOACs for VTE prophylaxis following surgery in older adults with hip fracture was associated with a similar rate of VTE compared to LMWH. However, there was a worrying trend toward an increased risk of hemorrhage.

Conclusion

In the present study of a carefully selected cohort of patients, the effect of DOACs in reducing the risk of VTE following surgery for hip fracture in the older adults was comparable to LMWH. However, a trend toward increased risk of hemorrhage was noted. Larger prospective studies will be required to identify patients who will benefit the most from treatment.

Venous thromboembolism rates remained unchanged in operative lower extremity orthopaedic trauma patients from 2008 to 2016

BACKGROUND

Venous thromboembolism (VTE) is a serious complication that contributes to morbidity, mortality, and healthcare costs during the surgical care of patient with lower extremity fractures. Despite this, few recommendations on the topic exist and the literature on VTE incidence is incomplete. Therefore, this study will attempt to estimate annual incidence and trends in 30-day thrombotic events and mortality for the following fractures: (1) hip, (2) femur, (3) patella, (4) tibia and/or fibula, and (5) ankle.

METHODS

We identified 120,521 operative lower extremity orthopaedic trauma patients from 2008 to 2016 using the American College of Surgeons National Surgical Quality Improvement Program (NSQIP) database. To evaluate the relationship between the year in which surgery was performed and comorbidities and demographic information bivariate analysis was performed. Bivariate analysis was also performed for the outcomes of interest and year in which the surgery was performed to assess for change. Additionally, bimodal multivariate logistic regression models for hip, femur, and ankle fractures were built, comparing the years 2009 to 2016 using 2008 as a baseline.

RESULTS

Overall incidence for VTE over the study period was 1.7% for hip fractures, 2.4% for femur fractures, 0.9% for patella fractures, 1.1% in tibia and/or fibula fractures, and 0.6% in ankle fractures. Over the study period VTE incidence saw a significant decrease (p < 0.05) in hip and femur fractures, but not for patella, tibia and/or fibula, and ankle fractures. After adjusting for confounding factors with multivariate analysis, the change in hip and femur fractures was no longer significant, while no significant decrease was again found for ankle fractures (p > 0.05).

CONCLUSION

Our study demonstrates that VTE rates have remained unchanged in operative lower extremity orthopaedic trauma from 2008 to 2016. This highlights the need for higher quality evidence on this important topic in orthopaedic trauma, including a reevaluation on the necessity of thromboprophylaxis guidelines.

LEVEL OF EVIDENCE

III.

Incidence and Risk Factors Associated with Venous Thromboembolism After Orthopaedic Below-knee Surgery

INTRODUCTION

Among patients undergoing below-knee orthopaedic surgery, no consensus exists regarding the need for or type of postoperative prophylaxis to prevent venous thromboembolic (VTE) events. The purpose of this study was to assess the incidence and risk factors associated with symptomatic VTE among orthopaedic patients undergoing below-knee surgery who were subject to different types of pharmacologic thromboprophylactic strategies.

METHODS

A total of 20,043 adult patients who underwent surgery for a below-knee orthopaedic condition between August 2005 and August 2015 were identified. Retrospective chart review recorded patient demographics, comorbid data, and anatomic location of any procedures performed. Multivariable logistic regression analysis was used to determine factors associated with postoperative development of symptomatic VTE among patients receiving various thromboprophylactic regimens.

RESULTS

The incidence of symptomatic VTE in patients who underwent below-knee surgery was 2.5% (492/20,043). For patients who did not receive thromboprophylaxis, the incidence was 1.5% (134/9,127 patients). In this group, risk factors for developing VTE were male sex; nonwhite race; surgery performed below the knee but above the ankle; combination procedures of the forefoot/midfoot, hindfoot/ankle, and/or lower leg; history of VTE; and Charlson Comorbidity Index score greater than 2. Among patients who received an antiplatelet agent, the VTE incidence was 1.7% (33/1,992 patients). The incidence of VTE among patients who received an oral or injectable anticoagulant was 3.6% (325/8,924 patients). In this group, risk factors for developing VTE were male sex; surgery performed below the knee but above the ankle; combination procedures of the forefoot/midfoot, hindfoot/ankle, and/or lower leg; and history of VTE.

CONCLUSION

Allowing for different types of thromboprophylactic strategies, the results of this study demonstrate a higher rate of symptomatic thromboembolic disease compared with previously reported <1% VTE incidence rates among orthopaedic patients undergoing below-knee surgery. Certain patients are at higher risk for thromboembolic disease after below-knee orthopaedic surgery. This risk was not found to be lowered by thromboprophylaxis as performed in patients in this database. Future research should be directed at determining what the best thromboprophylactic strategies are for lowering this risk.

LEVEL OF EVIDENCE

Therapeutic study level III.

Chemoprophylaxis for the Hip Fracture Patient: A Comparison of Warfarin and Low-Molecular-Weight Heparin

OBJECTIVE

To compare the rates of deep venous thrombosis (DVT), rates of pulmonary embolus (PE), and complication profiles of warfarin and low-molecular-weight heparin (LMWH) in patients undergoing operative fixation of hip fractures.

DESIGN

Retrospective cohort study.

SETTING

Insurance-based database of more than 22 million patient records.

PATIENTS

Adult hip fracture patients who were treated operatively and received chemoprophylaxis from 2007 to 2016. A total of 7594 patients met inclusion criteria and were available for final analysis.

INTERVENTION

Pharmacological anticoagulation with warfarin or LMWH to prevent postoperative venous thromboembolism after hip fracture surgery.

MAIN OUTCOME MEASURES

Development of DVT or PE within 30 and 90 days of surgery.

RESULTS

Patients prescribed warfarin had higher rates of DVT and PE compared with those prescribed LMWH. Patients on warfarin were more likely to develop a postoperative hematoma and to be readmitted within 30 and 90 days compared with those on LMWH. Patients in both groups had similar rates of total complications.

CONCLUSIONS

Patients prescribed warfarin after hip fractures had higher rates of DVT and PE compared with those prescribed LMWH, although both agents had similar complication profiles.

LEVEL OF EVIDENCE

Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

High prevalence of deep vein thrombosis in elderly hip fracture patients with delayed hospital admission

PURPOSE

Deep vein thrombosis (DVT) is a common complication in hip fracture patients, associated with significant morbidity and mortality. Research has focused on postoperative DVT, with scant reports on preoperative prevalence. The aim of this study was to describe the prevalence of preoperative DVT in patients accessing medical care ≥ 48 h after a hip fracture.

METHODS

We included elderly patients admitted ≥ 48 h after sustaining a hip fracture, between September 2015 and October 2017. Patients with a previous episode of DVT, undergoing anticoagulation therapy, with pathologic fractures or undergoing cancer treatment were excluded. Of 273 patients, 59 were admitted at least 48 h after the fracture. DVT screening by Doppler ultrasound of both lower extremities was carried upon hospital admission. We recorded age, sex, Charlson comorbidity index and ASA score, fracture type, time since injury, time from admission to surgery and total length of hospital stay.

RESULTS

We studied 41 patients, 79 (± 10.34) years old. The delay from injury to admission was 120 h (48-696 h). Seven patients (17.1%) had a DVT upon admission. There were no significant differences between patients with and without DVT, regarding time from admission to surgery or the total length of the hospital stay.

CONCLUSIONS

The prevalence of DVT in patients admitted ≥ 48 h after a hip fracture was 17.1%. The diagnosis and management of DVT did not increase time to surgery or hospital stay. Our results suggest routine screening for DVT in patients consulting emergency services ≥ 48 h after injury.

Interfacility Transfer Is a Risk Factor for Venous Thromboembolism in Lower Extremity Fracture Patients

OBJECTIVE

To compare the incidence of venous thromboembolism (VTE) among patients with pelvic and/or lower extremity fractures directly admitted to our institution versus those transferred from an outside hospital for definitive management.

DESIGN

Retrospective cohort.

SETTING

Tertiary care orthopaedic hospital.

PATIENTS

Six hundred ninety patients who received definitive care for a lower extremity fracture at our institution between 2010 and 2017.

INTERVENTION

Interfacility transfer for definitive management of pelvic or lower extremity fracture.

MAIN OUTCOME MEASUREMENTS

VTE incidence and time to surgery.

RESULTS

The interfacility transfer (TR) group comprised 126 patients, and the direct admission (DA) group comprised 564 patients. TR patients had a significantly higher incidence of VTE compared with the DA group: 9.5% versus 0.7%, respectively (P < 0.001). Time to surgery was also longer in the TR group compared with the DA group: 3.05 ± 3.00 days versus 2.16 ± 2.42 days, respectively (P = 0.005). Demographics for TR and DA did not significantly differ with regard to age, sex, length of stay, or American Society of Anesthesiologist score. In the TR group, no complete and explicit documentation regarding thromboprophylaxis administration while at the outside facility was found.

CONCLUSIONS

Patients undergoing interfacility transfer for definitive management of pelvic and lower extremity fractures are at a significantly increased risk of the development of VTE.

LEVEL OF EVIDENCE

Prognostic Level III. See Instructions for Authors for a complete description of levels of evidence.

Risk assessment and management of preoperative venous thromboembolism following femoral neck fracture

BACKGROUND

Limited studies are available to investigate the prevalence of preoperative venous thromboembolism (VTE) in elderly patients with femoral neck fractures. Our primary aim was to determine the incidences of VTE and its risk or protective factors in such patient population. The secondary objective was to evaluate the need of therapeutic anticoagulation for isolated calf muscular venous thrombosis (ICMVT) prior to femoral neck fracture surgery.

METHODS

This is a retrospective case-control study, including 301 femoral neck fracture patients who were admitted to our institution between January 2014 and March 2017. Bilateral Doppler ultrasonography was performed in each of the patients as a preoperative VTE screening. The event rate of VTE was calculated, and significant risk or protective factors were determined by using a multivariate logistic regression model. Patients with ICMVT were divided into anticoagulation and no anticoagulation groups to assess the efficacy and safety of preoperative therapeutic anticoagulation. Intraoperative blood loss, drainage volume, blood transfusion, perioperative hemoglobin change, and rate of thrombosis extension were compared between the two groups.

RESULTS

The overall preoperative incidence of VTE in patients with femoral neck fracture was 18.9% (57/301), in which deep vein thrombosis (DVT) was 18.9% and pulmonary embolism (PE) was 1%. Among the DVT cases, 77.2% (44/57) were ICMVTs. Multiple fractures (odds ratio [OR] = 9.418; 95% confidence interval [CI] = 2.537 to 34.96), coexisting movement disorder (OR = 3.862; 95% CI = 1.658 to 8.993), bed rest for more than 7 days (OR = 2.082; 95% CI = 1.011 to 4.284) as well as elevated levels of D-dimer (OR = 1.019; 95% CI = 1.002 to 1.037) and fibrinogen (OR = 1.345; 95% CI = 1.008 to 1.796) led to an increase in the risk of VTE, while the recent use of antiplatelet drug (OR = 0.424; 95% CI = 0.181 to 0.995) and prophylactic anticoagulation (OR = 0.503; 95% CI = 0.263 to 0.959) decreased the risk of VTE. For the 39 patients with ICMVT undergoing femoral neck fracture surgery, there were no significant differences in the rate of thrombosis extension between anticoagulation and no anticoagulation groups, but significantly decreased postoperative hemoglobin was observed in the anticoagulation group.

CONCLUSION

Our findings showed a high prevalence of preoperative VTE in elderly patients with femoral neck fracture, with risk factors identified. We found that the most detected VTE were ICMVTs. Our study suggested that a direct surgery without preoperative use of therapeutic anticoagulation for ICMVT would not reduce the risk of thrombus extension, and the therapeutic use of anticoagulation may worsen postoperative anemia.

Symptomatic pulmonary embolism following hip fracture: A nationwide study

INTRODUCTION

This study evaluated the incidence of symptomatic pulmonary embolism (PE), subsequent mortality, risk factors, and the effects of pharmacological thromboprophylactic intervention following hip fracture surgery in Taiwan.

MATERIALS AND METHODS

A nationwide study was conducted from February 2004 to September 2013. Hip fracture patients were placed into two groups: without symptomatic PE (control group) and with symptomatic PE (PE group). We analyzed the incidence of and risk factors for symptomatic PE, post-operative mortality rate, and effects of pharmacological thromboprophylactic intervention.

RESULTS

We identified 165,748 hip fracture patients. The 3-month cumulative incidence of post-operative symptomatic PE was 0.24% (n = 392). The cumulative 1-, 3-, and 6-month mortality rates were significantly higher in the PE group (16.1%, 23.0%, and 28.6%, respectively) than in the controls (3.3%, 6.7%, and 10.2%, respectively). Increased risk of post-operative symptomatic PE was associated with prior history of PE (adjusted odds ratio [OR], 40.00; 95% CI, 24.75-64.67; P < 0.001), female sex (adjusted OR, 1.33; 95% CI, 1.07-1.65; P = 0.009), older age (>75 years) (adjusted OR, 1.51; 95% CI, 1.20-1.91; P < 0.001), and hemiarthroplasty (adjusted OR, 1.23; 95% CI, 1.01-1.51; P < 0.043). Pharmacological thromboprophylaxis significantly reduced the incidence of post-operative PE (adjusted hazard ratio, 4.54; 95% CI, 2.08-9.88; P < 0.001).

CONCLUSIONS

The incidence of symptomatic PE after hip fracture surgery was not low in Asian patients, and PE significantly decreased patient survival rates. Some groups were at higher risk for PE; in these instances, thromboprophylaxis, prompt diagnosis, and subsequent intervention are advised.

Ultrasound-guided continuous fascia iliaca compartment block for pre-operative pain control in very elderly patients with hip fracture: A randomized controlled trial

The present study presented the results of a prospective, randomized controlled trial. The present study enrolled 98 very elderly patients with hip fractures, complicated with at least one cardiovascular, neurological or pulmonary disease, of whom 10 patients were excluded. A total of 88 patients were randomly assigned into 2 groups: i) The control group, receiving traditional analgesia including 50 mg Tramadol and 500 mg paracetamol orally three times a day from admission to surgery; and ii) the study group, receiving ultrasound-guided continuous fascia iliaca compartment block (CFICB), a single 50 ml 0.4% ropivacaine injection with continuous infusion of 0.2% ropivacaine at a dose of 5 ml/h from admission to surgery. The primary outcome measure of pain relief or pain intensity was assessed preoperatively and up to 48 h postoperatively using a visual analog scale (VAS). The results of the present study indicated that in the preoperative period, in the morning of the day of surgery, the VAS pain at rest scores were lower in the study group compared with the control group (P=0.023). The VAS passive movement scores of the study group were also significantly lower compared with the control group 1 h following analgesia at the time of admission (P<0.05) and in the morning of the day of surgery (P<0.05). Scores for patients' satisfaction with the analgesic regimen in the preoperative period were greater in the study group compared with the control group (P<0.001). There was no difference in analgesia-associated side effects between groups. Duration of hospital stay of patients in the control group was significantly longer compared with the study group (P=0.001). Patients in the study group were less likely to have increased complications compared with patients in the control group over the N2-N4 period (from preoperative period to after surgery; P=0.016). The present study concluded that ultrasound guided CFICB was an effective method of providing analgesia for very elderly (≥80 years old) with hip fracture.

Assessment of 30-day mortality and complication rates associated with extended deep vein thrombosis prophylaxis following hip fracture surgery

BACKGROUND

DVT is a common complication following lower extremity surgery, occurring in up to 60% of patients undergoing hip fracture surgery without postoperative anticoagulation. The risk of fatal PE continues well-beyond two weeks postoperatively, thus extended DVT prophylaxis beyond 14 days may be warranted. This investigation sought to examine the association between prescription of extended DVT prophylaxis and 30-day postoperative complications following hip fracture surgery.

METHODS

This study utilized the ACS NSQIP Hip Fracture Procedure Targeted dataset, a newly available set of patient variables for 2016. The outcome measures were death, occurrence of any postoperative complication, complication subtype, readmission or reoperation within 30-days postoperatively, and length of stay. The primary independent variable was medical DVT prophylaxis continued 28-days postoperatively ("extended DVT prophylaxis"). The control group contains both patients receiving no prophylaxis and those receiving short-duration prophylaxis. Multivariate stepwise logistic regression was employed to control for potential demographic, comorbidity, and procedural/medical confounding factors.

RESULTS

In total, 7533 surgically treated hip fracture patients treated in 2016 were analyzed. Overall, 57.8% of patients (n = 4354) were prescribed extended DVT prophylaxis. On bivariate analysis, prescription of extended DVT prophylaxis was associated with significantly lower incidence of death (7.7% without vs. 2.7% with, p < 0.0001) and stroke/CVA (1.4% vs. 0.6%, p = 0.0016). In multivariate analysis, prescription of extended DVT prophylaxis was significantly associated with lower odds of death (OR 0.33, p < 0.0001), stroke/CVA (OR 0.44, p = 0.0010), and acute kidney injury (AKI) (OR 0.31, p = 0.0010).

CONCLUSIONS

This retrospective cohort study of the 2016 ACS NSQIP found that hip fracture surgery patients prescribed ≥28 days of postoperative DVT prophylaxis exhibited 67% lower odds of death and significantly lower rates of AKI and stroke/CVA as compared to those prescribed short-duration prophylaxis. Given the retrospective and uncontrolled nature of this analysis, these results should be interpreted with caution, and additional prospective randomized controlled trials examining the association between extended DVT prophylaxis and postoperative outcomes are warranted. If these observations accurately reflect real-world experience, these data suggest that ≥28 days of DVT prophylaxis following hip fracture surgery should be strongly considered for patients without explicit contraindications.

Excess risk of venous thromboembolism in hip fracture patients and the prognostic impact of comorbidity

Hip fracture patients were at increased excess risk of venous thromboembolism (VTE) up to 1 year following hip fracture. During the first year, interaction between hip fracture and comorbidity was observed among patients with severe and very severe comorbidity.

INTRODUCTION

We compared the risk of VTE in hip fracture patients with that in the general population. We also examined whether and to what extent the association between hip fracture and VTE varied by comorbidity level.

METHODS

Nationwide cohort study based on Danish health registries, 1995-2015. We identified hip fracture patients (n = 110,563) and sampled a comparison cohort without hip fracture from the general population (n = 552,774). Comorbidity was assessed using the Charlson comorbidity index. We calculated attributable fraction, as the proportion of the VTE rate, among persons exposed to both hip fracture and comorbidity, attributed to exposure interaction.

RESULTS

The cumulative incidences of VTE were 0.73% within 30 days and 0.83% within 31-365 days among hip fracture patients, and 0.05 and 0.43% in the general population. Adjusted hazard ratios (HRs) of VTE among hip fracture patients were 17.29 [95% confidence interval (CI) 14.74-20.28] during the first 30 days and 2.13 (95% CI 1.95-2.32) during 31-365 days following hip fracture. The relative risks of VTE were 1.03 (95% CI 0.96-1.11) and 1.11 (95% CI 1.00-1.23) after 1-5 years and 6-10 years. During the first 30 days and 31-365 days, 14%/28% of VTE rates and 5%/4% of VTE rates were attributable to the interaction between hip fracture and severe/very severe comorbidity, respectively. Mortality risks within 30 days of VTE were 29.4% in hip fracture and 11.0% in general population cohorts.

CONCLUSIONS

Hip fracture patients were at increased excess risk of VTE up to 1 year following their fracture. During the first year, interaction between hip fracture and comorbidity was observed among patients with severe and very severe comorbidity.

Venous thromboembolism prevention with fondaparinux 1.5 mg in renally impaired patients undergoing major orthopaedic surgery

Despite the need for effective and safe thromboprophylactic drugs for patients with renal impairment, clinical trial data on anticoagulant agents are limited in this population. The study aim was to assess in the real-world setting the use of the once-daily 1.5 mg reduced dosage regimen of fondaparinux available for this context. In this prospective cohort study, patients with a creatinine clearance (CrCl) of 20–50 ml/ minute, undergoing total hip (THR) or knee (TKR) replacement or hip fracture surgery (HFS) received fondaparinux thromboprophylaxis. Main clinical outcomes were bleeding (major/clinically relevant nonmajor), symptomatic venous thromboembolism (VTE) and death. Overall, 442 patients (353 women; median age: 82 years; 39.4% in ASA class ≥3; mean ± SD CrCl: 39.0 ± 8.0 ml/minute; 78% with additional risk factors for bleeding), undergoing THR (43.7%), TKR (27.6%), or HFS (28.7%) received fondaparinux 1.5 mg for a mean ± SD duration of 16.0 ± 12.5 days. At postoperative day 10, the rates (95% confidence interval) of major bleeding, clinically relevant bleeding and symptomatic VTE were 4.5% (2.8–6.9), 0.5% (0.1–1.6) and 0.5% (0.05–1.62), respectively; no fatal bleeding, bleeding into a critical organ, pulmonary embolism or proximal deep-vein thrombosis occurred. Corresponding rates at one month were 5.2%, 0.7% and 0.7%. One-month mortality was 2.3% (0.9–3.6). This large clinical prospective study provides for the first time, under conditions reflecting “real-world” routine clinical practice, data on the bleeding and VTE risks of thromboprophylaxis with fondaparinux 1.5 mg after major orthopaedic surgery in renally impaired patients. It shows that these patients constitute a very elderly and fragile population.

ClinicalTrials.gov number, NCT00555438

Elevated Neopterin Levels Predict Early Death in Older Hip-fracture Patients

Our society faces a major challenge concerning management of the health and socio-economic burden caused by acute physical stress in the older population (+ 75 years). In particular, hip-fracture surgery (HFS) represents a major health care preoccupation, affecting 1.6 million patients worldwide, resulting in a significant drop in life quality and autonomy. The trauma is associated with 20–30% one-year mortality in the elderly. In the present study, we aim to identify factors, which influence and/or predict the outcome of elderly hip- fracture patients (HFP) post-surgery.

Our objective was to identify biomarkers with a prognostic capacity of one-year mortality. We employed an observational cohort of HFP (n = 60) followed-up longitudinally during the first year post fracture. Clinical and biological data (n = 136), collected at arrival to hospital, were then compared to healthy controls (n = 42) and analyzed using a regularized logistic regression model with lasso penalty followed by 10-fold cross-validation of variables.

We show that plasmatic neopterin levels, a molecule released by IFN-γ-activated macrophages, is predictive of mortality in HFP (ROC-AUC = 0.859). Moreover, neopterin measured at arrival to the hospital correlated negatively with the time of survival after HFS.

Neopterin therefore represents a biomarker, which enables better follow-up of patients at risk of early death.

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Neopterin level, measured at arrival to hospital, is a robust predictive marker of one-year mortality in HFPs.

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Neopterin concentration correlated negatively with the time of survival after hip fracture surgery.

The growing incidence of hip fractures, due to demographically aging populations, represent an important burden for health care systems and for injured patients in terms of hospitalization, rehabilitation, needs for long-term care, change in autonomy and mortality. Hip fractures are associated with high rates of adverse outcome, but previous studies have not discovered methods to identify patients at high risk of pernicious clinical outcome or death. Here, we show that innate immune activation post hip fracture in older adults is associated with pernicious clinical outcome.

Recent Updates of the Diagnosis and Prevention of Venous Thromboembolism in Patients with a Hip Fracture

Venous thromboembolism (VTE) is a potentially fatal complication that is relatively common after hip surgery. Since patients with a hip fracture have a higher risk of preoperative VTE due to an inability to ambulate after injury and aggravation of underlying age-related conditions, it may be difficult to effectively prevent VTE using only conventional approaches. Very few studies have been published reporting on the prevalence and prevention of VTE in patients with a hip fracture compared to those with hip arthroplasty. For this reason, we aimed to share recent updates on the diagnosis and prevention of VTE in patients with a hip fracture. Preoperative screening tests to diagnose VTE need to be performed more actively following hip fracture and indirect multidetector computed tomography venography is considered the most effective test for this purpose. As the risk of VTE appears to increase with time following a hip fracture, preventive measures should be taken as soon as possible in patients with a hip fracture. A wide variety of mechanical and pharmacological options are available for prophylaxis. When considering patient compliance and preventive impact, intermittent pneumatic compression devices and foot pumps are recommended as mechanical modalities. Of the available preventive medications for patients with a hip fracture, low molecular weight heparin seems to be the most appropriate option because of its short half-life and fast onset of action. Surgery should be performed as soon as possible in patients with hip fractures, and we recommend mechanical and pharmacological methods as active interventions immediately after injury to prevent VTE.

Population-Wide Impact of Non-Hip Non-Vertebral Fractures on Mortality

Data on long-term consequences of non-hip non-vertebral (NHNV) fractures, accounting for approximately two-thirds of all fragility fractures, are scanty. Our study aimed to quantify the population-wide impact of NHNV fractures on mortality. The national population-based prospective cohort study (Canadian Multicentre Osteoporosis Study) included 5526 community dwelling women and 2163 men aged 50 years or older followed from July 1995 to September 2013. Population impact number was used to quantify the average number of people for whom one death would be attributable to fracture and case impact number to quantify the number of deaths out of which one would be attributable to a fracture. There were 1370 fragility fractures followed by 296 deaths in women (mortality rate: 3.49; 95% CI, 3.11 to 3.91), and 302 fractures with 92 deaths in men (5.05; 95% CI, 4.12 to 6.20). NHNV fractures accounted for three-quarters of fractures. In women, the population-wide impact of NHNV fractures on mortality was greater than that of hip and vertebral fractures because of the greater number of NHNV fractures. Out of 800 women, one death was estimated to be attributable to a NHNV fracture, compared with one death in 2000 women attributable to hip or vertebral fracture. Similarly, out of 15 deaths in women, one was estimated to be attributable to a NHNV fracture, compared with one in over 40 deaths for hip or vertebral fracture. The impact of forearm fractures (ie, one death in 2400 women and one out of 42 deaths in women attributable to forearm fracture) was similar to that of hip, vertebral, or rib fractures. Similar, albeit not significant, results were noted for men. The study highlights the important contribution of NHNV fractures on mortality because many NHNV fracture types, except for the most distal fractures, have serious adverse consequences that affect a significant proportion of the population. © 2017 American Society for Bone and Mineral Research.

Excess mortality following hip fracture: impact of self-perceived health, smoking, and body mass index. A NOREPOS study

Self-perceived health, smoking, and body mass index measured years before the hip fracture predicted excess post-hip fracture mortality, and even hip fracture patients with the most favorable levels of these risk factors had higher mortality than subjects who did not fracture.

INTRODUCTION

This study aimed to investigate the impact of pre-fracture self-perceived health, smoking, and body mass index (BMI) on excess post-hip fracture mortality using matched peers without hip fracture as reference.

METHODS

The study was based on the Cohort of Norway (CONOR) consisting of 10 regional health studies (1994-2003) and the NOREPOS hip fracture database (1994-2008). A matched cohort design was used to compare survival between hip fracture patients and subjects without fracture (matched on gender, age at participation in CONOR, and study site). Subjects aged ≥60 years were included. Hazard ratios were estimated using stratified Cox regression. Age-standardized mortality was also calculated.

RESULTS

Overall, hip fracture patients (N = 3177) had a 2.26-fold (95 % CI 2.13, 2.40) increased mortality compared to matched subjects (N = 20,282). The highest excess mortality was found in hip fracture patients reporting poor health (HR 4.08, 95 % CI 3.17, 5.26) and daily smoking (HR 3.25, 95 % CI 2.89, 3.66) and in patients with BMI <18.5 (HR 3.07, 95 % CI 2.11, 4.47) prior to the fracture. However, excess mortality was also observed in hip fracture patients in all other categories of BMI, self-perceived health, and smoking.

CONCLUSIONS

Information on self-perceived health, smoking, and BMI collected years before hip fracture predicted excess post-hip fracture mortality, and even hip fracture patients with the most favorable levels of these risk factors had higher mortality than the matched subjects who did not fracture. This suggests that both pre-fracture health status and factors related to the hip fracture itself might affect post-hip fracture mortality.

Discontinuation of Plavix® (clopidogrel) for hip fracture surgery. A systematic review of the literature

The elderly population is increasing worldwide, associated with an increase in diseases related to aging, such as hip fractures. These patients are sometimes treated with clopidogrel. There are no arguments at present to clearly determine the risk/benefit ratio of early surgical management of traumatic hip fractures in patients treated with clopidogrel (perioperative blood loss, postoperative complications). The goal of this systematic review of the literature was to show that early surgical management (<48h) of patients treated with clopidogrel does not increase postoperative morbidity or mortality. Systematic review of the literature: level of evidence IV. A bibliographic search was performed in July 2015 in PubMed, Embase and Cochrane databases using the MeSh keywords "Clopidogrel or Plavix^®" AND "hip fracture". Two of the authors analyzed 48 articles based on the title and abstract. Twenty-one articles were selected and read completely with an analysis of the references. Nine articles were chosen. Early surgical management (<48h) of patients receiving clopidogrel did not increase mortality at 30days, 3months or 1 year (between 25 and 30% mortality at 1 year) and did not result in an increase in perioperative bleeding. The risk/benefit ratio of early surgical management of patients with hip fractures receiving clopidogrel is good; morbidity and mortality are not increased in these patients if surgery is performed immediately or less than 48h after admission.

LEVEL OF EVIDENCE

IV.

Clinical characteristics and risk factors of postoperative pneumonia after hip fracture surgery: a prospective cohort study

In this study, we attempt to determine the clinical characteristic and risk factors of postoperative pneumonia (POP) after hip fracture surgery in a well-defined hip fracture cohort. We find that intrinsic factors as well as major clinical interventions were all important risk factors of POP.

INTRODUCTION

Postoperative pneumonia (POP) is one of the major complications following hip fractures surgery. However, the risk factors of POP are not well studied in hip fracture cohorts. We attempt to determine the clinical characteristic and risk factors of POP after hip fracture surgery in a well-defined hip fracture cohort.

METHODS

Datasets from a prospective hip fracture cohort study with a 2-year follow-up period, from 2000 to 2011, were reanalyzed for characteristics of POP. Multivariate Cox proportional regression was used to evaluate the association between the incidence of POP and all-cause mortality. Multivariate logistic regression was used to screen for potential risk factors of POP by analyzing demographic factors, comorbidities, major clinical interventions, and hematological parameters.

RESULTS

In 1429 patients who underwent hip surgery, the incidence of POP was 4.9 % (n = 70). All-cause mortality of patients with POP was significantly higher than that of patients without POP at 30 days (hazard ratio (HR) 3.05, 95 % confidence intervals (CI) 1.88-4.94), 1 year (HR 1.87, 95 % CI 1.41-2.48), and 2 years (HR 1.57, 95 % CI 1.23-1.99) postoperatively. Multivariate logistic regression showed that intrinsic factors (advanced age, anemia, diabetes, prior stroke, number of comorbidities, ASA score ≥III, and some laboratory biomarkers) as well as major clinical interventions were all significant risk factors for POP.

CONCLUSION

Intrinsic factors and major clinical interventions were all important risk factors of POP in patients after hip fracture surgery. Targeted preventive measures to mitigate the above risk factors may help in reducing the incidence of POP.