Disorder-related risk factors for revision total hip arthroplasty after hip hemiarthroplasty in displaced femoral neck fracture patients: a nationwide population-based cohort study

Systematic review of multivariable prognostic models for outcomes at least 30 days after hip fracture finds 18 mortality models but no nonmortality models warranting validation

OBJECTIVES

Prognostic models have the potential to aid clinical decision-making after hip fracture. This systematic review aimed to identify, critically appraise, and summarize multivariable prediction models for mortality or other long-term recovery outcomes occurring at least 30 days after hip fracture.

STUDY DESIGN AND SETTING

MEDLINE, Embase, Scopus, Web of Science, and CINAHL databases were searched up to May 2023. Studies were included that aimed to develop multivariable models to make predictions for individuals at least 30 days after hip fracture. Risk of bias (ROB) was dual-assessed using the Prediction model Risk Of Bias ASsessment Tool. Study and model details were extracted and summarized.

RESULTS

From 5571 records, 80 eligible studies were identified. They predicted mortality in n = 55 studies/81 models and nonmortality outcomes (mobility, function, residence, medical, and surgical complications) in n = 30 studies/45 models. Most (n = 46; 58%) studies were published since 2020. A quarter of studies (n = 19; 24%) reported using 'machine-learning methods', while the remainder used logistic regression (n = 54; 68%) and other statistical methods (n = 11; 14%) to build models. Overall, 15 studies (19%) presented 18 low ROB models, all predicting mortality. Common concerns were sample size, missing data handling, inadequate internal validation, and calibration assessment. Many studies with nonmortality outcomes (n = 11; 37%) had clear data complexities that were not correctly modeled.

CONCLUSION

This review has comprehensively summarized and appraised multivariable prediction models for long-term outcomes after hip fracture. Only 15 studies of 55 predicting mortality were rated as low ROB, warranting further development of their models. All studies predicting nonmortality outcomes were high or unclear ROB. Careful consideration is required for both the methods used and justification for developing further nonmortality prediction models for this clinical population.

Comparative Effectiveness of Total Hip Arthroplasty and Hemiarthroplasty for Femoral Neck Fracture: A Propensity-Score-Matched Cohort Study

BACKGROUND

The optimal treatment of older patients with a displaced femoral neck fracture remains a controversial topic. This study aimed to compare clinical outcomes across a matched group of patients with a femoral neck fracture treated with either hemiarthroplasty or total hip arthroplasty (THA).

METHODS

Routinely collected health-care databases were linked to create a population-based cohort of 49,597 patients ≥60 years old from Ontario, Canada, who underwent hemiarthroplasty or THA for a femoral neck fracture between 2002 and 2017. A propensity-score-matched cohort was created using relevant and available predictors of treatment assignment and outcomes of interest. Clinical outcomes consisting of hip dislocation, revision surgery, hospital readmission, and death were compared in the matched cohort using survival analysis.

RESULTS

Over 99% of THA patients (4,612) were adequately matched 1:1 to hemiarthroplasty patients (total matched cohort = 9,224). Patients treated with THA were at higher risk for hip dislocation at 30 days and 1 and 2 years postoperatively (2-year risk, 1.8% for THA versus 0.8% for hemiarthroplasty; p < 0.001). There was no difference in the short-term (30-day) or long-term (up to 10-year) risk of revision surgery between treatment groups. There was no significant difference in the risk of 30-day hospital readmission between groups. The risk of death at 1 year and 2 years postoperatively was lower for patients treated with THA.

CONCLUSIONS

For patients with a hip fracture, shared decision-making should involve discussion of the potential higher risk of short-term hip dislocation after THA compared with hemiarthroplasty. The risk of revision surgery was similar between treatment groups at up to 10 years of follow-up.

LEVEL OF EVIDENCE

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

Reoperation rate and implant survivorship compared between cementless and cemented bipolar hemiarthroplasty in femoral neck fracture patients with chronic kidney disease

BACKGROUND

Chronic kidney disease (CKD) is commonly associated with aging and disorders of mineral and bone metabolism. Femoral neck fracture (FNF) is one of the most common fractures among older adults with coexisting CKD, and bipolar hemiarthroplasty (BHA) is a preferred treatment. However, the optimal method of stem fixation has not been conclusively determined. Accordingly, this study aimed to investigate the reoperation rate and implant survivorship compared between cementless and cemented BHA in FNF patients with CKD.

METHODS

A total of 183 FNF patients with moderate to severe CKD who underwent BHA during 2003 to 2019 were recruited and divided into either the cemented (CT group, n = 56) or cementless (CL group, 127) groups. Demographic data, preoperative laboratory investigations, preoperative radiographic outcomes, perioperative outcomes, and 90-day morbidity, mortality, and reoperation rates for any reason were recorded and compared between groups. Kaplan-Meier survival analysis was used to compare implant survivorship between the CT and CL groups. Cox proportional hazards regression model was used to identify independent risk factors for implant survivorship.

RESULTS

There were no significant differences in patient characteristics or preoperative data between groups, except for Dorr's classification of proximal femoral geometry. The CT group had a significantly lower proportion of Dorr type A (p = 0.020), and a higher proportion of Dorr type C (p<0.001). The CT group also had significantly more intraoperative blood loss (p<0.01). No significant differences in morbidity or mortality were observed. The median follow-up time in the CT group and CL group was 22.6 months (range: 0-151) and 22.6 months (range 0-154), respectively (p = 0.607). The reoperation rate was 5.4% and 4.7% among CT and CL patients, respectively (p = 1.000). There was no significant difference in the mean survival time between the CT (139.5 ± 6.3 months, 95%CI: 127.1-151.8) and CL (142.5 ± 4.7 months, 95%CI: 133.2-151.7) groups (p = 0.880). Univariate and multivariate analyses revealed no independent risk factors for implant survivorship.

CONCLUSION

The results of this study showed no significant differences in the reoperation rate or implant survivorship between cemented and cementless BHA for treating FNF in moderate to severe CKD patients. A well-designed larger and longer-term study is needed to confirm these results.

Acute femoral fracture does not compromise the outcome of total hip arthroplasty : 5 year results from a single center cohort study in 2,782 patients

National arthroplasty registries reveal a higher risk of revision for periprosthetic fracture and dislocation after total hip arthroplasty (THA) in patients with a femoral neck fracture compared to those with osteoarthritis (OA). Since these registries may con- tain confounding factors, we conducted a single center cohort study comparing survival and reason for failure between THA for an acute femoral neck fracture and OA using the same hip prosthesis after a minimum follow-up of 2 years. We retrospectively analyzed 2782 patients who had undergone THA with an Accolade TMZF stem and a Trident cup between March 2009 and September 2014. Primary diagnosis before THA was osteoarthritis (OA group : n=2610) or acute femoral fracture (Fracture group : n=172). Patients in both groups were operated on by the same hip surgeons. Effect of diagnosis on THA survival was analyzed using Cox-regression analysis. Chi-square tests were used to illustrate the different reasons for revision between the groups. Mean follow-up was 4.6 years (2-7.6). A total of 100 revisions were performed. The revision risk was comparable between the OA and Fracture group (HR=1.04, 95% CI :0.46-2.39). No differences were found between the OA and Fracture group with respect to the occurrence of periprosthetic fractures (0.8% vs. 0.6%, p=0.71) and revisions for dislocation (0.6% vs. 1.2%, p=0.38). We found no difference in outcome or reason for revision between THA for OA or femoral neck frac- ture. Using an implant with a proven ODEP rating and having experienced hip surgeons carry out the procedures may be more important than the primary diagnosis.

Functional Outcomes of Patients with Schizophrenia After Hip Fracture Surgery: A 1-Year Follow-up from an Institutional Hip Fracture Registry

BACKGROUND

Schizophrenia impairs a patient's self-care abilities, which are crucial after a hip fracture. Studies on the outcomes of patients with schizophrenia after a hip fracture are dated. This study aims to investigate the complication rates, 1-year mortality, and functional outcomes of surgically managed hip fractures in elderly patients with schizophrenia.

METHODS

This is a retrospective, single-institution cohort study based on a prospectively maintained registry of patients with hip fracture. In this study, 3,056 patients who were ≥60 years of age were treated under a geriatric-orthopaedic hip fracture pathway from January 2014 to December 2018. Baseline demographic characteristics and the Modified Barthel Index (MBI) scores were obtained at admission and at 6 months and 1 year after the fracture. Complications from the fracture and the surgical procedure were recorded during a minimum follow-up period of 2 years. A matching process (based on age, sex, and the MBI at admission) of up to 6 patients without schizophrenia per 1 patient with schizophrenia was utilized to increase power. Differences in perioperative, 6-month, and 1-year outcomes were compared for significance among surgically managed patients with schizophrenia and patients without schizophrenia.

RESULTS

Thirty-eight patients with schizophrenia were compared with 170 geriatric patients without schizophrenia who underwent a surgical procedure for a hip fracture. Patients with schizophrenia were more likely to be institutionalized postoperatively (26.3% compared with 4.7%; p < 0.001). Patients with schizophrenia had poorer MBI scores at 12 months (76 compared with 90 points; p = 0.006). The 1-year mortality rate was comparable (p = 0.29) between patients with schizophrenia (5.7%) and those without schizophrenia (2.4%). Similar trends in MBI were observed in the conservatively managed group of patients.

CONCLUSIONS

There was no increase in postoperative complications after a surgical procedure for a hip fracture in elderly patients with schizophrenia. The 1-year mortality after a surgical procedure for hip fracture is similar in both patients with schizophrenia and those without schizophrenia. Patients with schizophrenia and hip fracture who were surgically managed had poorer 1-year functional outcomes compared with patients without schizophrenia matched for age, sex, and MBI at admission. This information will be useful in shared decision-making discussions with patients and families.

LEVEL OF EVIDENCE

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

Breast cancer surgery in patients with schizophrenia: short-term outcomes from a nationwide cohort

BACKGROUND

Although patients with schizophrenia have a higher risk of developing breast cancer than the general population, studies that have investigated postoperative complications after breast cancer surgery in patients with schizophrenia are scarce. This study examined associations between schizophrenia and short-term outcomes following breast cancer surgery.

METHODS

Patients who underwent surgery for stage 0-III breast cancer between July 2010 and March 2017 were identified from a Japanese nationwide inpatient database. Multivariable analyses were conducted to compare postoperative complications and hospitalization costs between patients with schizophrenia and those without any psychiatric disorder. Three sensitivity analyses were performed: a 1 : 4 matched-pair cohort analysis with matching for age, institution, and fiscal year at admission; analyses excluding patients with schizophrenia who were not taking antipsychotic medication; and analyses excluding patients with schizophrenia who were admitted to hospital involuntarily.

RESULTS

The study included 3660 patients with schizophrenia and 350 860 without any psychiatric disorder. Patients with schizophrenia had a higher in-hospital morbidity (odds ratio (OR) 1.37, 95 per cent c.i. 1.21 to 1.55), with more postoperative bleeding (OR 1.34, 1.05 to 1.71) surgical-site infections (OR 1.22, 1.04 to 1.43), and sepsis (OR 1.20, 1.03 to 1.41). The total cost of hospitalization (coefficient €743, 95 per cent c.i. 680 to 806) was higher than that for patients without any psychiatric disorder. All sensitivity analyses showed similar results to the main analyses.

CONCLUSION

Although causal inferences remain premature, multivariable regression analyses showed that schizophrenia was associated with greater in-hospital morbidity and higher total cost of hospitalization after breast cancer surgery than in the general population.

A Catastrophic Cascade of Postoperative Complications Following Hemiarthroplasty for Femoral Neck Fracture in a Middle-Aged Patient With Schizophrenia

The treatment of a patient with schizophrenia suffering a subcapital hip fracture may be challenging, mainly due to the high risk of postoperative medical and surgical complications. Mechanical complications from the implant are also frequently encountered following hip arthroplasty in patients with schizophrenia. We report the case of a 57-year-old male patient with schizophrenia who underwent hip hemiarthroplasty for a displaced femoral neck fracture. During the initial postoperative period, the patient developed a cascade of surgical and mechanical complications, leading to multiple revision procedures and a suboptimal outcome. The ideal type of treatment of patients with schizophrenia with subcapital hip fracture is still missing. It is, therefore, important to highlight the high risk of postoperative complications in patients with schizophrenia who present with subcapital fractures subsequently treated with hemiarthroplasty. 

Effects of Chronic Kidney Disease on Hemiarthroplasty Outcomes for Fragility Hip Fracture in Diabetic Patients: A Nationwide Population-Based Observational Study

BACKGROUND

The aim of this study is to compare perioperative outcomes, readmission, and mortality after hemiarthroplasty for hip fractures in diabetic patients with different renal function statuses.

METHODS

In this retrospective population-based cohort study, diabetic patients who received primary hemiarthroplasty for hip fracture between January 1997 and December 2013 were identified from the Taiwan National Health Insurance Research Database. Primary outcomes were perioperative outcomes including infection and revision. Secondary outcomes were all-cause readmission and mortality.

RESULTS

A total of 29,535 diabetic patients were included: 8270 patients had chronic kidney disease (CKD group), 1311 patients underwent permanent dialysis (dialysis group), and 19,954 patients did not have CKD (non-CKD group). During a mean follow-up of 4.5 years, these 3 groups had comparable risks of any infection, including superficial and deep infection. Dialysis patients had a significantly higher risk of revision than did CKD and non-CKD patients (subdistribution hazard ratio 1.65, 95% confidence interval 1.16-2.36; subdistribution hazard ratio 1.57, 95% confidence interval 1.10-2.24, respectively). Compared with the non-CKD group, the dialysis group had significantly higher risks of readmission and mortality at all time points, namely 3 months after surgery, 1 year after surgery, and the final follow-up. The CKD group also had higher risks of readmission and mortality than did the non-CKD group at all time points.

CONCLUSION

CKD is associated with poor outcomes following hemiarthroplasty for fragility hip fracture. CKD patients may have higher risks of surgical complications including revision than non-CKD patients, and they have significantly elevated risks of readmission and mortality.

Effect of Kidney Disease on Hemiarthroplasty Outcomes After Femoral Neck Fractures

OBJECTIVE

To compare the outcomes of patients with predialysis chronic kidney disease (CKD) or end-stage renal disease (ESRD) with the outcomes of patients with no kidney disease after hemiarthroplasty (HA) for femoral neck fractures (FNF).

DESIGN

Retrospective review utilizing the Nationwide Readmissions Database.

SETTING

National database incorporating inpatient data from 22 states.

PATIENTS

Using the Nationwide Readmissions Database, 214,399 patients who underwent HA after FNF between 2010 and 2014 were identified and divided into 3 groups using ICD-9 diagnosis codes: no kidney disease (n = 176,300, 82%), predialysis CKD (n = 34,400, 16%), and ESRD (n = 3,698, 2%).

INTERVENTION

HA for FNF.

MAIN OUTCOME MEASUREMENT

Mortality, blood transfusion, and postoperative complications during index hospitalization. Hospital readmission, postoperative dislocation, periprosthetic fracture, and revision surgery within 90 days of surgery.

RESULTS

Compared to patients with no kidney disease, ESRD patients had an increased risk of mortality [odds ratio (OR) = 3.76, 95% confidence interval (CI), 2.95-4.78], blood transfusion (OR = 2.35, 95% CI, 2.08-2.64), and postoperative complications (OR = 1.64, 95% CI, 1.45-1.86) during the index hospitalization as well as an increased risk of 90-day hospital readmission (OR = 3.09, 95% CI, 2.72-3.50). Interestingly, even patients with predialysis CKD had an increased risk of mortality (OR = 1.80, 95% CI, 1.59-2.05), blood transfusion (OR = 1.66, 95% CI, 1.59-1.75), and postoperative complications (OR = 2.37, 95% CI, 2.25-2.50) during the index hospitalization as well as an increased risk of 90-day hospital readmission (OR = 1.43, 95% CI, 1.37-1.51).

CONCLUSIONS

This retrospective cohort study demonstrates that both ESRD and CKD patients have worse outcomes compared to patients with no kidney disease after HA for FNF.

LEVEL OF EVIDENCE

Prognostic Level III. See instructions for authors for a complete description of levels of evidence.