"Failure to Rescue" following Colorectal Cancer Resection: Variation and Improvements in a National Study of Postoperative Mortality

Enhanced Recovery Independently Lowers Failure to Rescue After Colorectal Surgery

BACKGROUND

High adherence to the enhanced recovery after surgery pathway reduces morbidity and mortality rates after elective colorectal surgery.

OBJECTIVE

To evaluate the effect of adherence to the enhanced recovery after surgery pathway on the failure to rescue rates after elective colorectal surgery.

DESIGN

Retrospective analysis of a prospective database.

PATIENTS

Adults (18 years or older) who underwent elective colorectal resection with anastomosis for benign and malignant disease.

SETTINGS

Prospective enrollment in 78 centers in Italy from 2019 to 2021.

INTERVENTIONS

All outcomes were measured 60 days after surgery. Several patient-, disease-, treatment-, hospital-, and complication-related variables were analyzed. After univariate analyses, independent predictors of the end points were identified through logistic regression analyses, presenting ORs and 95% CIs.

MAIN OUTCOME MEASURES

Failure to rescue after any adverse event, defined as the ratio between the number of deaths and the number of patients showing any adverse event; failure to rescue after any major adverse event, with the denominator represented by the number of patients showing any major adverse event.

RESULTS

An adverse event was recorded in 2321 of 8359 patients (27.8%), a major adverse event in 523 patients (6.3%), and death in 88 patients (1.0%). The failure to rescue rates were 3.8% after any adverse event and 16.8% after any major adverse event. Independent predictors of primary end points were identified among patient- (age, ASA class, and nutritional status), treatment- (type of resection), and complication-related (anastomotic leakage and reoperation) variables. Enhanced recovery pathway adherence of more than 70% independently reduced failure to rescue rates.

LIMITATIONS

Clustering from multicenter data and unmeasured confounding from observational data.

CONCLUSIONS

After elective colorectal resection, adherence of more than 70% to the enhanced recovery pathway independently decreased failure to rescue rates, along with other patient- or treatment-related factors. See Video Abstract .

LA RECUPERACIN MEJORADA REDUCE DE FORMA INDEPENDIENTE LA POSIBILIDAD DE FRACASO EN EL RESCATE DESPUS DE UNA CIRUGA COLORRECTAL

ANTECEDENTES:La alta adherencia a la vía de recuperación mejorada después de la cirugía reduce las tasas de morbilidad y mortalidad después de la cirugía colorrectal electiva.OBJETIVO:Evaluar el efecto de la adherencia a la vía ERAS en las tasas de fracaso en el rescate después de la cirugía colorrectal electiva.DISEÑO:Análisis retrospectivo de una base de datos prospectiva.PACIENTES:Adultos (≥ 18 años) que se sometieron a una resección colorrectal electiva con anastomosis por enfermedad benigna y maligna.ESCENARIO:Inscripción prospectiva en 78 centros en Italia de 2019 a 2021.INTERVENCIONES:Todos los resultados se midieron a los 60 días después de la cirugía. Se analizaron varias variables relacionadas con el paciente, la enfermedad, el tratamiento, el hospital y las complicaciones para los resultados. Después de los análisis univariados, se identificaron los predictores independientes de los puntos finales a través de análisis de regresión logística, presentando razones de probabilidades e intervalos de confianza del 95%.PRINCIPALES MEDIDAS DE RESULTADOS:Fallo en el rescate después de cualquier evento adverso, definido como la relación entre el número de muertes y el número de pacientes que presentaron cualquier evento adverso; fallo en el rescate después de cualquier evento adverso mayor, con el denominador representado por el número de pacientes que presentaron cualquier evento adverso mayor.RESULTADOS:Se registró un evento adverso en 2321 de 8359 pacientes (27,8%), un evento adverso mayor en 523 pacientes (6,3%) y muerte en 88 pacientes (1,0%). Las tasas de fallo en el rescate fueron del 3,8% después de cualquier evento adverso y del 16,8% después de cualquier evento adverso mayor. Se identificaron predictores independientes de los criterios de valoración primarios entre las variables relacionadas con el paciente (edad, clase de la Sociedad Americana de Anestesiólogos, estado nutricional), el tratamiento (tipo de resección) y las complicaciones (fuga anastomótica, reoperación). La adherencia a la vía de recuperación mejorada > 70% redujo de forma independiente las tasas de fallo en el rescate.LIMITACIONES:Agrupamiento de datos multicéntricos y factores de confusión no medidos a partir de datos observacionales.CONCLUSIONES:Después de una resección colorrectal electiva, la adherencia > 70 % a la vía de recuperación mejorada disminuyó de manera independiente las tasas de fracaso en el rescate, junto con otros factores relacionados con el paciente o el tratamiento. (Traducción-Dr Osvaldo Gauto).

Failure to rescue in colon surgery

BACKGROUND

Major complications (MC) after colorectal surgery are not uncommon and can have serious consequences for patient survival. Failure to rescue (FTR) is an indicator used to measure the capacity for correct management of MC, calculated as the number of patients who die among all those who present MC.

METHODS

Observational study with retrospective data analysis of all patients undergoing scheduled colon cancer surgery at a Spanish university hospital from September-2012 to August-2016. Preoperative, intraoperative and postoperative variables were recorded. Postoperative complications Clavien-Dindo scores>II were considered MC. FTR was defined as death within 90 postoperative days in patients with at least one MC.

RESULTS

A total of 564 patients were included, of whom 140 (24.8%) presented MC. Of these, 22 died, representing an FTR rate of 15.7%. Patients with MC had a mean age of 69.6 years, and 30.7% were women. An open approach was used in 81.4%. Compared with survivors, the group of non-survivors presented a higher proportion of ASA III and IV (P=0.008), a higher mean age (P=0.001) and a higher proportion of anastomotic leaks (P=0.009). Multivariate analysis confirmed that age (OR 1.161; P=000), anastomotic leak (OR 18; P=0.001) and sepsis of origin other than anastomotic leak or intra-abdominal collection (OR 26; P=0.001) were significantly associated with FTR as independent factors.

CONCLUSION

The FTR rate after colectomy in our series was similar or slightly lower than other series. Age, anastomotic leakage, and sepsis of non-abdominal origin were independent factors associated with FTR. We contend that FTR is an excellent indicator of a center's ability to resolve MC. It is particularly useful for implementing measures to ensure effective treatment of MC.

How aging may impact the failure to rescue after colorectal laparoscopic surgery. Analysis of 1000 patients in a single high-volume center

This study aimed to evaluate the FTR after laparoscopic colorectal surgery in an Italian high-volume centre. A retrospective analysis was conducted in a consecutive series of patients who underwent elective laparoscopic colorectal surgery for neoplastic disease between January 2010 and December 2023 at the General Surgery Department of the San Eugenio Hospital, Rome, Italy. Patients were grouped by age in adult (vs. < 75 years) and elderly group (≥ 75 years). A multivariate analysis of the predictive factors of complications was performed. A total of 1,000 patients met the inclusion criteria, excluding those who underwent open or robotic surgery, either in emergency or elective settings. 53 patients (5.3%) experienced major complications. The mean age of patients with no or mild complications was 65.60 years (± 10.61), whereas patients with severe complications were older (69.94 years ± 12.02, p = 0.0041). Gender distribution and BMI do not represent a risk factor for major complications (p = 0.2555 and p = 0.2686, respectively), unlike the ASA score III or IV (p = 0.0001). The overall FTR rate for adult patients is 9%, while it is slightly higher at 10% for elderly patients. No statistical differences were found between the 2 groups. Elderly patients had more frequent FTR due to infective complications, while the FTR rate for cardiovascular disease was more frequent in the adult group. Minimally invasive approach, skilled team, well-established rapid response and standardized complication management protocols can positively impact FTR regardless of patients' age.

Evaluation of travel time to colorectal cancer care and survival: A cohort study using cancer registry data in Osaka Prefecture, Japan

BACKGROUND

Cancer care in Japan faces a major challenge in maintaining equity in access and efficiency. Care is provided on the basis of catchment area, referred to as a secondary medical area (SMA); at least one designated cancer care hospital (DCCH) is placed in every SMA. We aimed to evaluate travel time and net survival by SMA among patients diagnosed with colorectal cancer (CRC) in Osaka Prefecture, Japan.

METHODS

We used cancer registry data for this cohort study and included patients diagnosed with CRC during 2013-2018. We evaluated equality in the utilisation of care by travel time between patients' addresses and medical institutions for diagnosis or treatment in Osaka Prefecture. Travel time was compared by SMA of residence. We analysed which factors were associated with travel time using quantile regression. Efficiency was evaluated as un-standardised, age-standardised and stage-stratified three-year net survival by SMA of hospital for patients who received surgical resection.

RESULTS

Among the 53,301 patients, the estimated median travel time was 27 (interquartile range 14 to 61, 90th percentile 82) minutes. Travel time varied between SMAs of residence by 20 minutes and types of hospital (prefectural DCCH versus non-DCCH) by 15 minutes at most. Regarding net survival, all SMA of hospital were within the 99.8 % control limits. However, around 40 % of hospitals had annual surgical volume below ten.

CONCLUSIONS

Travel time varied by SMA by 20 minutes at most. Although net survival was equalised across catchment areas, the current situation suggests an over-regionalisation of surgical care. The entire prefecture may need to reallocate resources to achieve higher efficiency.

POLICY SUMMARY

Reconfiguring cancer care might be inevitable to cut the waste of resource inputs, but access equity should also be considered when centralising care.

Postoperative outcomes in colorectal surgery by day of surgery: A national cohort study

AIM

Poorer postoperative outcomes have been observed for patients admitted and operated on later in the week and over the weekend. This is thought to be related to temporal fluctuations in the quality of perioperative care. The aim of this work was to identify if the day of surgery influenced outcomes in a national cohort of colorectal cancer (CRC) resections.

METHOD

A retrospective population-based study of patients undergoing CRC resection during the period 2010-2020 in Aotearoa New Zealand (AoNZ) was conducted. Ninety-day postoperative mortality, morbidity, postoperative length of stay (PLOS), reoperation and failure to rescue (FTR) were calculated for elective and acute cohorts, stratified by the day of surgery. FTR-Surgical (mortality following reoperation within 90 days of the index operation) was also analysed by day of reoperation. Univariable and mixed-effects, multivariate, logistic regression models were analysed.

RESULTS

The overall cohort included 17 174 patients who underwent surgery for CRC. The 90-day mortality in the elective and acute cohorts was 2.4% (336/13 744) and 11% (371/3430), respectively. Ninety-day mortality, inpatient complications, FTR and PLOS did not differ by day of surgery in acute and elective cohorts. Notably, patients having elective surgery on a Wednesday had a significantly higher rate of reoperation (OR 1.29, 95% CI 1.06-1.56, p = 0.012). Furthermore, reoperation following complication of the index surgery was associated with a significantly higher 90-day mortality (FTR-Surgical) for patients having reoperation on a Friday (OR 2.10, 95% CI 1.01-4.33, p = 0.045).

CONCLUSION

There is no variation in postoperative outcomes across the week for both elective and emergency cases. This study does, however, highlight a higher FTR-S later on Friday, suggesting that these high-risk patients may require closer postoperative monitoring over the weekend.

Feasibility and Accuracy of Wrist-Worn Sensors for Perioperative Monitoring During and After Major Abdominal Surgery: An Observational Study

INTRODUCTION

Continuous, ambulatory perioperative monitoring using wearable devices has shown promise for earlier detection of physiological deterioration and postoperative complications, preventing 'failure-to-rescue'. This study aimed to compare the accuracy of vital signs measured by wrist-based wearables with gold standard measurements from vital signs monitors or nurse assessments in major abdominal surgery.

METHODS

Adult patients were eligible for inclusion in this prospective observational study validating the Empatica E4 wrist sensor intraoperatively and postoperatively. The primary outcomes were the 95% limits of agreement (LoA) between manual and device recordings of heart rate (HR) and temperature evaluated via Bland-Altman analysis. Secondary analysis was conducted using Clarke-Error grid analysis.

RESULTS

Overall, 31 patients were recruited, and 27 patients completed the study. The median duration of recording per patient was 70.3 h, and a total of 2112 h of data recording were completed. Wrist-based HR measurement was accurate and moderately precise (bias: 0.3 bpm; 95% LoA -15.5 to 17.1), but temperature measurement was neither accurate nor precise (bias -2.2°C; 95% LoA -6.0 to 1.6). On Clarke-Error grid analysis, 74.5% and 29.6% of HR and temperature measurements, respectively, fell within the acceptable range of reference standards.

CONCLUSIONS

Continuous perioperative monitoring of HR and temperature after major abdominal surgery using wrist-based sensors is feasible but was limited in this study by low precision. While wrist-based devices offer promise for the continuous monitoring of high-risk surgical patients, current technology is inadequate. Ongoing device hardware and software innovation with robust validation is required before such technologies can be routinely adopted in clinical practice.

Upper gastrointestinal and hepatopancreaticobiliary surgery in New Zealand: Balancing the volume-outcome relationship with accessibility in a surgically low volume country

INTRODUCTION

New Zealand has a population of only 5.5 million meaning that for many surgical procedures the country qualifies as a "low-volume center." However, the health system is well developed and required to provide complex surgical procedures that benchmark internationally against comparable countries. This investigation was undertaken to review regional variation and volumes of complex resection and palliative upper gastrointestinal (UGI) surgical procedures within New Zealand.

METHODS

Data pertaining to patients undergoing complex resectional UGI procedures (esophagectomy, gastrectomy, pancreatectomy, and hepatectomies) and palliative UGI procedures (esophageal stenting, enteroenterostomy, biliary enteric anastomosis, and liver ablation) in a New Zealand hospital between January 1, 2000 and December 31, 2019 were obtained from the National Minimum Dataset.

RESULTS

New Zealand is a low-volume center for UGI surgery (229 hepatectomies, 250 gastrectomies, 126 pancreatectomies, and 74 esophagectomies annually). Over 80% of patients undergoing hepatic resection/ablation, gastrectomy, esophagectomy, and pancreatectomy are treated in one of the six national cancer centers (Auckland, Waikato, Mid-Central, Capital Coast, Canterbury, or Southern). There is evidence of the decreasing frequency of these procedures in small centers with increasing frequency in large centers suggesting that some regionalization is occurring. Palliative procedures were more widely performed. Indigenous Māori were less likely to be treated in a nationally designated cancer center than non-Māori.

CONCLUSIONS

The challenge for New Zealand and similarly sized countries is to develop and implement a system that optimizes the skills and pathways that come from a frequent performance of complex surgery while maintaining system resilience and ensuring equitable access for all patients.

Artificial intelligence in surgery

Artificial intelligence (AI) is rapidly emerging in healthcare, yet applications in surgery remain relatively nascent. Here we review the integration of AI in the field of surgery, centering our discussion on multifaceted improvements in surgical care in the preoperative, intraoperative and postoperative space. The emergence of foundation model architectures, wearable technologies and improving surgical data infrastructures is enabling rapid advances in AI interventions and utility. We discuss how maturing AI methods hold the potential to improve patient outcomes, facilitate surgical education and optimize surgical care. We review the current applications of deep learning approaches and outline a vision for future advances through multimodal foundation models.

Variation in the definition of 'failure to rescue' from postoperative complications: a systematic review and recommendations for outcome reporting

BACKGROUND

Failure to rescue is the rate of death amongst patients with postoperative complications and has been proposed as a perioperative quality indicator. However, variation in its definition has limited comparisons between studies. We systematically reviewed all surgical literature reporting failure to rescue rates and examined variations in the definition of the 'numerator,' 'denominator,' and timing of failure to rescue measurement.

METHODS

Databases were searched from inception to 31 December 2022. All studies reporting postoperative failure to rescue rates as a primary or secondary outcome were included. We examined the complications included in the failure to rescue denominator, the percentage of deaths captured by the failure to rescue numerator, and the timing of measurement for complications and mortality.

RESULTS

A total of 359 studies, including 212,048,069 patients, were analyzed. The complications included in the failure to rescue denominator were reported in 295 studies (82%), with 131 different complications used. The median number of included complications per study was 10 (interquartile range 8-15). Studies that included a higher number of complications in the failure-to-rescue denominator reported lower failure-to-rescue rates. Death was included as a complication in the failure to rescue the denominator in 65 studies (18%). The median percentage of deaths captured by the failure to rescue calculation when deaths were not included in the denominator was 79%. Complications (52%) and mortality (40%) were mostly measured in-hospital, followed by 30-days after surgery.

CONCLUSION

Failure to rescue is an important concept in the study of postoperative outcomes, although its definition is highly variable and poorly reported. Researchers should be aware of the advantages and disadvantages of different approaches to defining failure to rescue.

Management of non-curative endoscopic resection of T1 colon cancer

Endoscopic resection techniques enable en-bloc resection of T1 colon cancers. A complete removal of T1 colon cancer can be considered curative when histologic examination of the specimens shows none of the high-risk factors for lymph nodes metastases. Criteria predicting lymph nodes metastases include deep submucosal invasion, poor differentiation, lymphovascular invasion, and high-grade tumor budding. In these cases, complete (R0), local endoscopic resection is considered sufficient as negligible risk of lymph nodes metastases does not outweigh morbidity and mortality associated with surgical resection. Challenges arise when endoscopic resection is incomplete (RX/R1) or high-risk histological features are present. The risk of lymph node metastasis in T1 CRC ranges from 1% to 36.4%, depending on histologic risk factors. Presence of any risk factor labels the patient "high risk," warranting oncologic surgery with mesocolic lymphadenectomy. However, even if 70%-80% of T1-CRC patients are classified as high-risk, more than 90% are without lymph node involvement after oncological surgery. Surgical overtreatment in T1 CRC is a challenge, requiring a balance between oncologic safety and minimizing morbidity/mortality. This narrative review explores the landscape of managing non-curative T1 colon cancer, focusing on the choice between advanced endoscopic resection techniques and surgical interventions. We discuss surveillance strategies and shared decision-making, emphasizing the importance of a multidisciplinary approach.

Wearable Sensors as a Preoperative Assessment Tool: A Review

Surgery is a common first-line treatment for many types of disease, including cancer. Mortality rates after general elective surgery have seen significant decreases whilst postoperative complications remain a frequent occurrence. Preoperative assessment tools are used to support patient risk stratification but do not always provide a precise and accessible assessment. Wearable sensors (WS) provide an accessible alternative that offers continuous monitoring in a non-clinical setting. They have shown consistent uptake across the perioperative period but there has been no review of WS as a preoperative assessment tool. This paper reviews the developments in WS research that have application to the preoperative period. Accelerometers were consistently employed as sensors in research and were frequently combined with photoplethysmography or electrocardiography sensors. Pre-processing methods were discussed and missing data was a common theme; this was dealt with in several ways, commonly by employing an extraction threshold or using imputation techniques. Research rarely processed raw data; commercial devices that employ internal proprietary algorithms with pre-calculated heart rate and step count were most commonly employed limiting further feature extraction. A range of machine learning models were used to predict outcomes including support vector machines, random forests and regression models. No individual model clearly outperformed others. Deep learning proved successful for predicting exercise testing outcomes but only within large sample-size studies. This review outlines the challenges of WS and provides recommendations for future research to develop WS as a viable preoperative assessment tool.

Hospital variations in failure to rescue after abdominal surgery: a nationwide, retrospective observational study

OBJECTIVES

This study aims to determine hospital variation and intensive care unit characteristics associated with failure to rescue after abdominal surgery in Norway.

DESIGN

A nationwide retrospective observational study.

SETTING

All 52 hospitals in Norway performing elective and acute abdominal surgery.

PARTICIPANTS

All 598 736 patients undergoing emergency and elective abdominal surgery from 2011 to 2021.

PRIMARY OUTCOME MEASURE

Primary outcome was failure to rescue within 30 days (FTR30), defined as in-hospital or out-of-hospital death within 30 days of a surgical patient who developed at least one complication within 30 days of the surgery (FTR30). Other outcome variables were surgical complications and hospital FTR30 variation. Statistical analysis was conducted separately for general surgery and abdominal surgery.

RESULTS

The 30-day postoperative complication rate was 30.7 (183 560 of 598 736 surgeries). Of general surgical complications (n=25 775), circulatory collapse (n=6127, 23%), cardiac arrhythmia (n=5646, 21%) and surgical infections (n=4334, 16 %) were most common and 1507 (5.8 %) patients were reoperated within 30 days. One thousand seven hundred and forty patients had FTR30 (6.7 %). The severity of complications was strongly associated with FTR30. In multivariate analysis of general surgery, adjusted for patient characteristics, only the year of surgery was associated with FTR30, with an estimated linear trend of -0.31 percentage units per year (95% CI (-0.48 to -0.15)). The driving distance from local hospitals to the nearest referral intensive care unit was not associated with FTR30. Over the last decade, FTR30 rates have varied significantly among similar hospitals.

CONCLUSIONS

Hospital factors cannot explain Norwegian hospitals' significant FTR variance when adjusting for patient characteristics. The national FTR30 measure has dropped around 30% without a corresponding fall in surgical complications. No association was seen between rural hospital location and FTR30. Policy-makers must address microsystem issues causing high FTR30 in hospitals.

Integration of the social determinants of health into quality indicators for colorectal cancer surgery: a scoping review protocol

INTRODUCTION

Quality monitoring is a critical component of high-performing cancer care systems. Quality indicators (QIs) are standardised, evidence-based measures of healthcare quality that allow healthcare systems to track performance, identify gaps in healthcare delivery and inform areas of priority for strategic planning. Social structures and economic systems that allow for unequal access to power and resources that shape health and health inequities can be described through the social determinants of health (SDoH) framework. Therefore, granular analysis of healthcare quality through SDoH frameworks is required to identify patient subgroups who may experience health inequity. Given the high burden of disease of colorectal cancer (CRC) and well-defined cancer care pathways, CRC is often the first disease site targeted by health systems for quality improvement. The objective of this review is to examine how SDoH have been integrated into QIs for CRC surgery. This review aims to address three primary questions: (1) Have SDoH been integrated into the development, reporting and assessment of CRC surgery QIs? (2) When integrated, what measures and statistical methods have been applied? (3) In which direction do individual SDoH influence QIs outputs?

METHODS

This review will follow Arksey and O'Malley frameworks for scoping reviews. We will search MEDLINE, EMBASE, HealthSTAR databases for papers that examine QIs for CRC surgery applicable to healthcare systems from database inception until January 2023. Interventional trials, prospective and retrospective observational studies, reviews, case series and qualitative study designs will be included. Two authors will independently review all titles, abstracts and full texts to determine which studies meet the inclusion criteria.

ETHICS & DISSEMINATION

No ethics approval is required for this review. Results will be disseminated through scientific presentation and relevant conferences targeted for researchers examining healthcare quality and equity in cancer care.

REGISTRATION DETAILS

osf.io/vfzd3-Open Science Framework.

Potential uses of AI for perioperative nursing handoffs: a qualitative study

Objective

Situational awareness and anticipatory guidance for nurses receiving a patient after surgery are keys to patient safety. Little work has defined the role of artificial intelligence (AI) to support these functions during nursing handoff communication or patient assessment. We used interviews to better understand how AI could work in this context.

Materials and Methods

Eleven nurses participated in semistructured interviews. Mixed inductive-deductive thematic analysis was used to extract major themes and subthemes around roles for AI supporting postoperative nursing.

Results

Five themes were generated from the interviews: (1) nurse understanding of patient condition guides care decisions, (2) handoffs are important to nurse situational awareness, but multiple barriers reduce their effectiveness, (3) AI may address barriers to handoff effectiveness, (4) AI may augment nurse care decision making and team communication outside of handoff, and (5) user experience in the electronic health record and information overload are likely barriers to using AI. Important subthemes included that AI-identified problems would be discussed at handoff and team communications, that AI-estimated elevated risks would trigger patient re-evaluation, and that AI-identified important data may be a valuable addition to nursing assessment.

Discussion and Conclusion

Most research on postoperative handoff communication relies on structured checklists. Our results suggest that properly designed AI tools might facilitate postoperative handoff communication for nurses by identifying specific elevated risks faced by a patient, triggering discussion on those topics. Limitations include a single center, many participants lacking of applied experience with AI, and limited participation rate.

Characterising nationwide reasons for unplanned hospital readmission after colorectal cancer surgery

BACKGROUND

Readmissions after colorectal cancer surgery are common, despite advancements in surgical care, and have a significant impact on both individual patients and overall healthcare costs. The aim of this study was to determine the 30-and 90 days readmission rate after colorectal cancer surgery, and to investigate the risk factors and clinical reasons for unplanned readmissions.

METHOD

A multicenter, population-based study including all patients discharged after index colorectal cancer resection from 2010 to 2020 in Aotearoa New Zealand (AoNZ) was completed. The Ministry of Health National Minimum Dataset was used. Rates of readmission at 30 days and 90 days were calculated. Mixed-effect logistic regression models were built to investigate factors associated with unplanned readmission. Reasons for readmission were described.

RESULTS

Data were obtained on 16,885 patients. Unplanned 30-day and 90-day hospital readmission rates were 15.1% and 23.7% respectively. The main readmission risk factors were comorbidities, advanced disease, and postoperative complications. Hospital level variation was not present. Despite risk adjustment, R² value of models was low (30 days: 4.3%, 90 days: 5.2%). The most common reasons for readmission were gastrointestinal causes (32.1%) and wound complications (14.4%). Rates of readmission did not improve over the 11 years study period (p = 0.876).

CONCLUSION

Readmissions following colorectal resections in AoNZ are higher than other comparable healthcare systems and rates have remained constant over time. While patient comorbidities and postoperative complications are associated with readmission, the explanatory value of these variables is poor. To reduce unplanned readmissions, efforts should be focused on prevention and early detection of post-discharge complications.