Cause of death the first year after curative colorectal cancer surgery; a prolonged impact of the surgery in elderly colorectal cancer patients

Nomogram predicting the cardiovascular disease mortality for older patients with colorectal cancer: A real-world population-based study

BACKGROUND

Cardio-oncology has received increasing attention especially among older patients with colorectal cancer (CRC). Cardiovascular disease (CVD)-specific mortality is the second-most frequent cause of death. The risk factors for CVD-specific mortality among older patients with CRC are still poorly understood.

AIM

To identify the prognostic factors and construct a nomogram-based model to predict the CVD-specific mortality among older patients with CRC.

METHODS

The data on older patients diagnosed with CRC were retrieved from The Surveillance, Epidemiology, and End Results database from 2004 to 2015. The prognostic factors and a nomogram-based model predicting the CVD-specific mortality were assessed using least absolute shrinkage and selection operator and Cox regression.

RESULTS

A total of 141251 eligible patients with CRC were enrolled, of which 41459 patients died of CRC and 12651 patients died of CVD. The age at diagnosis, sex, marital status, year of diagnosis, surgery, and chemotherapy were independent prognostic factors associated with CVD-specific mortality among older patients with CRC. We used these variables to develop a model to predict CVD-specific mortality. The calibration curves for CVD-specific mortality probabilities showed that the model was in good agreement with actual observations. The C-index value of the model in the training cohort and testing cohort for predicting CVD-specific mortality was 0.728 and 0.734, respectively.

CONCLUSION

The proposed nomogram-based model for CVD-specific mortality can be used for accurate prognostic prediction among older patients with CRC. This model is a potentially useful tool for clinicians to identify high-risk patients and develop personalized treatment plans.

How to compensate for frailty? The real life impact of geriatric co-management on morbi-mortality after colorectal cancer surgery in patients aged 70 years or older

In Europe, CRC is the second most common cause of cancer death, and surgery remains the mainstay curative treatment. Age and frailty are associated with an increased risk of postoperative morbidity and 1-year mortality. Chronological age is not sufficient to assess the risk of postoperative complications. The CGA has been developed to better identify frail patients. Geriatric co-management have been developed to optimize the post-operative outcomes. We analyzed the real-life of geriatric co-management within an ERAS program on surgical outcomes at 90 days and oncologic outcomes at 1 year in patients aged 70 years or older after surgery for CRC. This was a retrospective study based on a prospective cohort. Fifty-one patients with a G8 score ≤ 14 were referred to geriatricians for preoperative CGA (Frail Group). They were compared with 151 patients with a G8 score ≥ 15 (Robust Group). In the Frail Group, patients were significantly older with more comorbidities than the patients in the Robust Group. Oncologic characteristics, treatments and global post-operative outcomes were comparable between the two groups. One year after surgery mortality and recurrence rates were similar between the two groups. Our study suggests that geriatric co-management is feasible and contributes to the reduction of postoperative morbimortality. Moreover, performing the CGA after G8 score screening and completion of geriatric interventions resulted in similar 90-day postoperative outcomes, in frail patients than in robust patients. Our results confirmed the benefit of geriatric co-management, involving G8 screening, CGA, and ERAS, for frail older patients undergoing surgery for CRC.

Factors associated with one-year mortality after curative surgery for primary clinical T4 and locally recurrent rectal cancer in elderly patients

INTRODUCTION

Despite advancements in colorectal cancer care, one-year post-operative mortality rates remain high for elderly patients who have undergone curative surgery for primary clinical T4 rectal cancer (cT4RC) or locally recurrent rectal cancer (LRRC). This study aimed to identify factors associated with one-year mortality and to evaluate the causes of death.

MATERIALS & METHODS

This retrospective cohort study included patients aged ≥70 years who underwent surgery with curative intent for cT4RC or LRRC between January 2013 and December 2020. Clinical and follow-up data were collected and analyzed to determine survival rates and investigate factors associated with mortality within one year after surgery.

RESULTS

A total of 183 patients (94 cT4RC, 89 LRRC) were included. One-year mortality rates were 16.0% for cT4RC and 28.1% for LRRC (P = 0.064). In cT4RC patients, factors associated with one-year mortality were preoperative anemia (OR 3.83, P = 0.032), total pelvic exenteration (TPE) (OR 7.18, P = 0.018), multivisceral resections (OR 5.73, P = 0.028), pulmonary complications (OR 13.31, P < 0.001) and Clavien-Dindo grade ≥ III complications (OR 5.19, P = 0.025). In LRRC patients, factors associated with one-year mortality were TPE (OR 27.00, P = 0.008), the need for supported care after discharge (OR 3.93, P = 0.041) and Clavien-Dindo grade ≥ III complications (OR 3.95, P = 0.006). The main causes of death in cT4RC and LRRC patients were failure to recover (cT4RC 26.6%, LRRC 28.0%) and disease recurrence (cT4RC 26.6%, LRRC 60.0%).

CONCLUSION

In order to tailor treatment in elderly with cT4RC and LRRC, factors associated with increased one-year mortality (e.g. pre-operative anemia, TPE) should be incorporated in the decision-making process.

CLINICAL TRIAL REGISTRATION

Not applicable.

Medical versus surgical causes of death following colorectal resection: a Queensland Audit of Surgical Mortality (QASM) study

BACKGROUND

The causes of death following colorectal resection remain poorly explored. Few studies have addressed whether early post-operative mortality is predominantly caused by a patient's medical co-morbidities, or from factors pertaining to the presenting surgical disease process itself. This study analyses data from the Queensland audit of surgical mortality (QASM) to report the causes of in-hospital death following colorectal resection, identifies whether these were due to either medical or surgical factors, and determines the patient characteristics associated with a medical cause of death.

METHODS

Through analysis of QASM Surgical Case Forms, the causes of in-hospital death were determined in 750 patients who died in Queensland following colorectal resection between January 2010 and December 2020. Deaths were attributed to a specific medical or surgical cause, with multivariate analysis used to identify independent risk factors associated with a medical cause of death.

RESULTS

In total, 395 patients (52.7%) died due to surgical causes and 355 (47.3%) died due to medical causes. Respiratory co-morbidities (OR 1.832, 95% CI: 1.267-2.650), advanced malignancy (OR 1.814, 95% CI: 1.262-2.607), neurological co-morbidities (OR 1.794, 95% CI: 1.168-2.757) and advanced age (OR 1.430, 95% CI: 1.013-2.017) were independent risk factors associated with increased risk of a medical cause of death.

CONCLUSION

Even in the absence of complicating surgical factors, a significant number of patients died in hospital following colorectal resection due to their underlying co-morbidities. Multi-disciplinary models of care which allow for the early recognition and treatment of medical complications may reduce post-operative mortality in these patients.

The prognostic value of a geriatric risk score for older patients undergoing emergency surgery of colorectal cancer: A retrospective cohort study

INTRODUCTION

Emergency surgery of colorectal cancer is associated with high mortality rates in older patients. We investigated whether information on four geriatric domains has prognostic value for 30-day mortality and postoperative morbidity including severe complications.

MATERIALS AND METHODS

All consecutive patients aged 70 years or older who underwent emergency colorectal cancer surgery in six Dutch hospitals (2014-2017) were studied. Presence of geriatric risk factors was scored prior to surgery as either 0 (risk absent) or 1 (risk present) in each of four geriatric domains and summed up to calculate a sumscore with a value between 0 and 4. In addition, we separately investigated the use of a mobility aid. Primary outcome was 30-day mortality. Secondary outcomes were any postoperative complications and severe complications. Multivariable logistic regression model was used to evaluate the sumscore and outcomes.

RESULTS

Two hundred seven patients were included. Median age was 79.4 years. One hundred seventy-five patients (76%) presented with obstruction, 22 (11%) with a perforation, and 17 (8%) with severe anemia. Mortality rates were 2.9%, 13.6%, and 29.6% for patients with a sumscore of 0, 1-2, and 3-4 respectively, with odds ratio (OR) 4.8 [95% confidence interval (CI) 1.03-22.95] and OR 10.6 [95% CI 1.99-56.34] for a sumscore of 1-2 and 3-4 respectively. Use of a mobility aid was associated with increased mortality OR 8.0 [95% CI 2.74-23.43] and severe complications OR 2.31 [95% CI 1.17-4.55].

DISCUSSION

This geriatric sumscore and the use of a mobility aid have strong association with 30-day mortality after emergency surgery of colorectal cancer. This could provide better insight into surgical risk and help select high-risk patients for alternative strategies.

Developing prognostic nomograms to predict overall survival and cancer-specific survival in synchronous multiple primary colorectal cancer based on the SEER database

BACKGROUND

Synchronous multiple primary colorectal cancer (SMPCC) is a rare subtype of CRC, characterized by the presence of two or more primary CRC lesions simultaneously or within 6 months from the detection of the first lesion. We aim to develop a novel nomogram to predict OS and CSS for SMPCC patients using data from the SEER database.

METHODS

The clinical variables and survival data of SMPCC patients between 2004 and 2018 were retrieved from the Surveillance, Epidemiology, and End Results (SEER) database. Appropriate inclusion and exclusion criteria were established to screen the enrolled patients. Univariate and multivariate Cox regression analyses were used to identify the independent risk factors for OS and CSS. The performance of the nomogram was evaluated using the concordance index (C-index), calibration curves, and the area under the curve (AUC) of a receiver operating characteristics curve (ROC). A decision curve analysis (DCA) was generated to compare the net benefits of the nomogram with those of the TNM staging system.

RESULTS

A total of 6772 SMPCC patients were enrolled in the study and randomly assigned to the training (n = 4670) and validation (n = 2002) cohorts. Multivariate Cox analysis confirmed that race, marital status, age, histology, tumor position, T stage, N stage, M stage, chemotherapy, and the number of dissected LNs were independent prognostic factors.The C-index values for OS and CSS prediction were 0.716 (95% CI 0.705-0.727) and 0.718 (95% CI 0.702-0.734) in the training cohort, and 0.760 (95% CI 0.747-0.773) and 0.749 (95% CI 0.728-0.769) in the validation cohort. The ROC and calibration curves indicated that the model had good stability and reliability. Decision curve analysis revealed that the nomograms provided a more significant clinical net benefit than the TNM staging system.

CONCLUSION

We developed a novel nomogram for clinicians to predict OS and CSS, which could be used to optimize the treatment in SMPCC patients.

Oncological and surgical outcomes of radical surgery in elderly colorectal cancer patients with intestinal obstruction

Background

The treatment strategy for elderly colorectal cancer patients with intestinal obstruction remains controversial. The choice of reasonable treatment and surgical method directly affects perioperative safety and prognosis. This study investigated the safety and long-term efficacy of radical surgery in elderly colorectal cancer patients over 80 years old with intestinal obstruction.

Methods

The clinicopathological data of elderly patients over 80 years old with intestinal obstruction who underwent colorectal cancer surgery from January 2012 to December 2021 were retrospectively collected and analysed. Patients were assigned to a radical group and a palliative group according to the surgical method. Propensity score matching (PSM) was performed to match patients in the radical group 1:1 with those in the palliative group. The perioperative-related indexes and prognosis were compared between the two groups.

Results

A total of 187 patients were enrolled in this study. After PSM, 58 matched pairs were selected, and the radical and palliative groups were well balanced in terms of the clinical and surgical characteristics (P > 0.05). The proportion of patients transferred to the ICU after surgery in the radical group was significantly higher than that in the palliative group (17.2% vs. 5.2%, P = 0.039). In terms of postoperative complications, the incidence of grade 1-5 complications in the radical group was significantly higher than that in the palliative group (37.9% vs. 15.5%, P = 0.006); however, there was no significant difference in the incidence of grade 3-5 complications between the two groups (6.9% vs. 1.7%, P = 0.364). In addition, the complications were subclassified, and it was found that the incidence of gastrointestinal disorders (20.7% vs. 6.9%, P = 0.031) after surgery was significantly higher in the radical group. The 3-year OS rates were 55.2% and 22.6% in the radical and palliative groups, respectively (P < 0.001). Multivariate analysis revealed that radical surgery was an independent prognostic factor for OS (HR: 4.32; 95% CI, 1.93-12.45; P < 0.001).

Conclusion

Although elderly colorectal cancer patients over 80 years of age with intestinal obstruction are more likely to be admitted to the ICU and develop more postoperative complications after radical surgery, long-term survival benefits can be achieved.

Elderly patients over 80 years undergoing colorectal cancer resection: Development and validation of a predictive nomogram for survival

BACKGROUND

Surgery remains the primary treatment for localized colorectal cancer (CRC). Improving surgical decision-making for elderly CRC patients necessitates an accurate predictive tool.

AIM

To build a nomogram to predict the overall survival of elderly patients over 80 years undergoing CRC resection.

METHODS

Two hundred and ninety-five elderly CRC patients over 80 years undergoing surgery at Singapore General Hospital between 2018 and 2021 were identified from the American College of Surgeons – National Surgical Quality Improvement Program (ACS-NSQIP) database. Prognostic variables were selected using univariate Cox regression, and clinical feature selection was performed by the least absolute shrinkage and selection operator regression. A nomogram for 1- and 3-year overall survival was constructed based on 60% of the study cohort and tested on the remaining 40%. The performance of the nomogram was evaluated using the concordance index (C-index), area under the receiver operating characteristic curve (AUC), and calibration plots. Risk groups were stratified using the total risk points derived from the nomogram and the optimal cut-off point. Survival curves were compared between the high- and low-risk groups.

RESULTS

Eight predictors: Age, Charlson comorbidity index, body mass index, serum albumin level, distant metastasis, emergency surgery, postoperative pneumonia, and postoperative myocardial infarction, were included in the nomogram. The AUC values for the 1-year survival were 0.843 and 0.826 for the training and validation cohorts, respectively. The AUC values for the 3-year survival were 0.788 and 0.750 for the training and validation cohorts, respectively. C-index values of the training cohort (0.845) and validation cohort (0.793) suggested the excellent discriminative ability of the nomogram. Calibration curves demonstrated a good consistency between the predictions and actual observations of overall survival in both training and validation cohorts. A significant difference in overall survival was seen between elderly patients stratified into low- and high-risk groups (P < 0.001).

CONCLUSION

We constructed and validated a nomogram predicting 1- and 3-year survival probability in elderly patients over 80 years undergoing CRC resection, thereby facilitating holistic and informed decision-making among these patients.

A novel risk prediction nomogram for early death in patients with resected synchronous multiple primary colorectal cancer based on the SEER database

BACKGROUND

Synchronous multiple primary colorectal cancer (SMPCC) involves the simultaneous occurrence of 2 or more independent primary malignant tumors in the colon or rectum. Although SMPCC is rare, it results in a higher incidence of postoperative complications and mortality compared to patients with single primary colorectal cancer (SPCRC).

METHODS

The clinical factors and survival outcomes of SMPCC patients registered on the Surveillance, Epidemiology, and End Results (SEER) database between 2000 and 2017 were extracted. The patients were divided into the training and validation cohorts using a ratio of 7:3. Univariate and multivariate logistic regression analyses were used to identify the independent risk factors for early death. The performance of the nomogram was evaluated using the concordance index (C-index), calibration curves, and the area under the curve (AUC) of a receiver operating characteristics curve (ROC). A decision curve analysis (DCA) was used to evaluate the clinical utility of the nomogram and standard TNM system.

RESULTS

A total of 4386 SMPCC patients were enrolled in the study and randomly assigned to the training (n = 3070) and validation (n = 1316) cohorts. The multivariate logistic analysis identified age, chemotherapy, radiotherapy, T stage, N stage, and M stage as independent risk factors for all-cause and cancer-specific early death. The marital status was associated with all-cause early death, and the tumor grade was associated with cancer-specific early death. In the training cohort, the nomogram achieved a C-index of 0.808 (95% CI, 0.784-0.832) and 0.843 (95% CI, 0.816-0.870) for all-cause and cancer-specific early death, respectively. Following validation, the C-index was 0.797 (95% CI, 0.758-0.837) for all-cause early death and 0.832 (95% CI, 0.789-0.875) for cancer-specific early death. The ROC and calibration curves indicated that the model had good stability and reliability. The DCA showed that the nomogram had a better clinical net value than the TNM staging system.

CONCLUSION

Our nomogram can provide a simple and accurate tool for clinicians to predict the risk of early death in SMPCC patients undergoing surgery and could be used to optimize the treatment according to the patient's needs.

Short term results in a population based study indicate advantage for laparoscopic colon cancer surgery versus open

The aim of this study was to compare LAP with OPEN regarding short-term mortality, morbidity and completeness of the cancer resection for colon cancer in a routine health care setting using population based register data. All 13,683 patients who were diagnosed 2012-2018 and underwent elective surgery for right-sided or sigmoid colon cancer were included from the Swedish Colorectal Cancer Registry and the National Patient Registry. Primary outcome was 30-day mortality. Secondary outcomes were 90-day mortality, length of hospital stay, reoperation, readmission and positive resection margin (R1). Weighted and unweighted multi regression analyses were performed. There were no difference in 30-day mortality: LAP (0.9%) and OPEN (1.3%) (OR 0.89, 95% CI 0.62-1.29, P = 0.545). The weighted analyses showed an increased 90-day mortality following OPEN, P < 0.001. Re-operations and re-admission were more frequent after OPEN and length of hospital stay was 2.9 days shorter following LAP (P < 0.001). R1 resections were significantly more common in the OPEN group in the unweighted and weighted analysis with P = 0.004 and P < 0.001 respectively. Therefore, the favourable short-term outcomes following elective LAP versus OPEN resection for colon cancer in routine health care indicate an advantage of laparoscopic surgery.

Investigating Surgeons' Reactions to Patients' Death: A Phenomenological Study

The main purpose of this study was to scrutinize the reaction of surgeons towards patients' death. This study enjoyed a qualitative approach using a phenomenological lived experience. 12 surgeons who had witnessed patients' death were selected through purposive sampling until data saturation was achieved. The data were collected using semi-structured interviews and were analyzed through the Colaizzi's method. The main concepts extracted from the analysis of the participants' experience comprised three main themes, six sub-categories and 19 initial sub-categories. The main themes were (a) emotional-mental reactions including the sub-themes of emotional distress, mood disorder and mental distress, (b) death encounter including the sub-themes of rational encounter and pre-emptive measure and (c) post-traumatic growth covering the concepts of optimism and performance improvement. The obtained findings imply that the patients' death can sometimes make surgeons aware of the post-incident growth although such deaths affect their personal, family, social and professional lives.

Risk of non-colorectal cancer-related death in elderly patients with the disease: A comparison of five preoperative risk assessment indices

BACKGROUND

A considerable number of elderly patients with colorectal cancer (CRC) die of non-CRC-related causes. The Controlling Nutritional Status (CONUT) score, American Society of Anesthesiologists Physical Status classification, Charlson Comorbidity Index, National Institute on Aging, and National Cancer Institute Comorbidity Index, and Adult Comorbidity Evaluation-27 score are all known predictors of survival in patients with CRC. However, the utility of these indices for predicting non-CRC-related death in elderly CRC patients is not known.

METHODS

The study population comprised 364 patients aged 80 years or more who received curative resection for stage I-III CRC between 2000 and 2016. The association of each index with non-CRC-related death was compared by competing-risks analysis such as the cumulative incidence function and proportional subdistribution hazards regression analysis as well as time-dependent receiver-operating characteristic (ROC) analysis.

RESULTS

There were 85 deaths (40 CRC-related and 45 non-CRC-related) during a median observation period of 53.2 months. Cumulative incidence function analysis identified CONUT score as the most suitable for risk stratification for non-CRC-related death. In proportional subdistribution hazards regression, risk of non-CRC-related death increased significantly as CONUT score worsened (2/3/4 vs. 0/1, hazard ratio 1.73, 95% confidence interval [CI] 0.91-3.15; ≥5 vs. 2/3/4, hazard ratio 2.71, 95% CI 1.08-6.81). Time-dependent ROC curve analysis showed that CONUT score were consistently superior to other indices during the 5-year observation period.

CONCLUSIONS

The majority of deaths in elderly patients with CRC were not CRC-related. CONUT score was the most useful predictor of non-CRC-related death in these patients.

Impact of age and comorbidities on short- and long-term outcomes of patients undergoing surgery for colorectal cancer

Background

As the world population is progressively ageing, more and more elderly patients will require cancer surgery. Although curative surgery is the treatment of choice for resectable colorectal cancer (CRC), it is still debated whether elderly frail patients should undergo major cancer surgery due to the increased risk of postoperative and long-term mortality. The aim of this retrospective study was to evaluate the impact of age and comorbidities on postoperative mortality/morbidity and long-term outcomes, looking for potential age-related survival differences.

Methods

A total of 1,482 patients operated for CRC at our institution between January 2005 and October 2020 were analysed. The independent effect of age and comorbidities on postoperative complications was assessed by a logistic model, while the effect on overall survival (OS) and cancer-related survival (CRS) was estimated by a Cox regression model.

Results

The median age in the cohort was 67.8 years. Postoperative mortality was very low in the whole cohort (0.8%) and contained even in older age groups (3.2% in patients aged 80–84 years, 4% in the 85–90-year age group). The cumulative incidence of postoperative complications was doubled in patients with comorbidities (32.8% vs. 15.1%, p = 0.002). With regard to OS, as expected, it exponentially decreased with advancing age. Conversely, differences in CRS were less pronounced between age groups and absent in patients with stage 0–I CRC. Analysis of all causes and cancer-related mortality revealed a peak within 2 years from surgery, suggesting a prolonged impact of surgery. In patients aged 75 years and above, all-cause mortality showed a steep increase 1 year after surgery, while cancer-related mortality plateaued at about 4 years after surgery. On multivariable analysis, OS, but not CRS, was significantly influenced by age.

Conclusions

Although acceptable results of surgery in elderly patients, OS is strongly dependent on age: older people die more from competing causes than cancer-related treatments compared to younger age classes. The preoperative identification of risk factors for low OS may help the selection of those elderly patients who would benefit from curative CRC surgery.

Factors associated with survival in older patients with stage I-III colorectal carcinoma who were not managed curatively in the Netherlands

AIM

Some patients with stage I-III colorectal cancer (CRC) do not undergo tumor resection. Little is known about survival of these non-curatively managed patients. The aim of this study is to report all-cause mortality and to identify which factors are associated with survival in these patients.

METHODS

A retrospective review of electronic medical records was performed in two hospitals in the Netherlands. Patients diagnosed with CRC without distant metastases (radiologically determined stage I-III) and managed without tumor resection between 2011 and 2017 were included. The primary outcome was all-cause mortality. The effect of several variables on survival was evaluated with a multivariate logistic regression.

RESULTS

Of the 107 patients with stage I-III CRC that did not undergo resection of the primary tumor, 80% died within two years; median survival time was 8.5 months (IQR 2.5-22 months). Malnutrition risk (OR 6.36 (CI 1.21-33.25); p = 0.03) and comorbidity burden (OR 1.51 (CI 1.05-2.18 p = 0.03) were significantly associated with decreased survival after two years in a multivariate model. Age and disease stage were not. When treatment decision was mainly patient driven instead of based on the multi-disciplinary tumor board's decision, survival was longer (mean overall survival 16 months vs 10 months, respectively) p < 0.05.

CONCLUSION

Survival of patients with radiologically determined stage I-III CRC who did not undergo surgical resection was approximately 20% at two years and associated with the number of comorbidities, malnutrition risk status and dependent living, but not with age or disease stage.

Oxidative Stress Predicts Post-Surgery Complications in Gastrointestinal Cancer Patients

INTRODUCTION

An excessive perioperative inflammatory reaction can lead to more postoperative complications in patients treated for gastrointestinal cancers. It has been suggested that this inflammatory reaction leads to oxidative stress. The most important nonenzymatic antioxidants are serum free thiols. The purpose of this study was to evaluate whether high preoperative serum free thiol levels are associated with short-term clinical outcomes.

METHODS

Blood samples were drawn before, at the end of, and 1 and 2 days after surgery of a consecutive series of patients with gastrointestinal cancer. Serum free thiols were detected using a colorimetric detection method using Ellman's reagent. Short-term clinical outcomes were defined as 30-day complications (Clavien-Dindo ≥2) and length of hospital stay. Logistic regression was applied to examine the association between serum free thiol levels and short-term patient outcomes.

RESULTS

Eighty-one patients surgically treated for gastrointestinal cancer were included in the study. Median age was 68 (range 26-87) years, and 28% were female. Patients in the lowest tertile of preoperative serum free thiols had a threefold higher risk to develop postoperative complications (odds ratio [OR]: 3.4; 95% confidence interval [CI]:1.1-10.7) and a fourfold higher risk to have an increased length of stay in the hospital (OR 4.0; 95% CI 1.3-12.9) compared with patients in the highest tertile.

CONCLUSIONS

Patients with lower preoperative serum free thiol levels, indicating a decrease in extracellular antioxidant capacity and therefore an increase in systemic oxidative stress, are more likely to develop postoperative complications and show a longer in hospital stay than patients with higher serum free thiol levels.

Socioeconomic disparities in colorectal cancer survival: contributions of prognostic factors in a large Australian cohort

Purpose

We quantified the contributions of prognostic factors to socioeconomic disparities in colorectal cancer survival in a large Australian cohort.

Methods

The sample comprised 45 and Up Study participants (recruited 2006–2009) who were subsequently diagnosed with colorectal cancer. Both individual (education attained) and neighbourhood socioeconomic measures were used. Questionnaire responses were linked with cancer registrations (to December 2013), records for hospital inpatient stays, emergency department presentations, death information (to December 2015), and Medicare and Pharmaceutical Benefits claims for subsidised procedures and medicines. Proportions of socioeconomic survival differences explained by prognostic factors were quantified using multiple Cox proportional hazards regression.

Results

1720 eligible participants were diagnosed with colorectal cancer after recruitment: 1174 colon and 546 rectal cancers. Significant colon cancer survival differences were only observed for neighbourhood socioeconomic measure (p = 0.033): HR = 1.55; 95% CI 1.09–2.19 for lowest versus highest quartile, and disease-related factors explained 95% of this difference. For rectal cancer, patient- and disease-related factors were the main drivers of neighbourhood survival differences (28–36%), while these factors and treatment-related factors explained 24–41% of individual socioeconomic differences. However, differences remained significant for rectal cancer after adjusting for all these factors.

Conclusion

In this large contemporary Australian cohort, we identified several drivers of socioeconomic disparities in colorectal cancer survival. Understanding of the role these contributors play remains incomplete, but these findings suggest that improving access to optimal care may significantly reduce these survival disparities.

Loss of ZNF677 expression is a predictive biomarker for lymph node metastasis in Middle Eastern Colorectal Cancer

Zinc-finger proteins are transcription factors with a “finger-like” domain that are widely involved in many biological processes. The zinc-finger protein 677 (ZNF677) belongs to the zinc-finger protein family. Previous reports have highlighted the tumor suppressive role of ZNF677 in thyroid and lung cancer. However, its role in colorectal cancer (CRC) has not been explored. ZNF677 protein expression was analyzed by immunohistochemistry in a large cohort of 1158 CRC patients. ZNF677 loss of expression was more frequent in CRC tissues (45.3%, 525/1158), when compared to that of normal tissue (5.1%, 11/214) (p < 0.0001) and was associated with mucinous histology (p = 0.0311), advanced pathological stage (p < 0.0001) and lymph node (LN) metastasis (p = 0.0374). Further analysis showed ZNF677 loss to be significantly enriched in LN metastatic CRC compared to overall cohort (p = 0.0258). More importantly, multivariate logistic regression analysis showed that ZNF677 loss is an independent predictor of LN metastasis in CRC (Odds ratio = 1.41; 95% confidence interval 1.05–1.87; p = 0.0203).The gain- and loss-of-function studies in CRC cell lines demonstrated that loss of ZNF677 protein expression prominently increased cell proliferation, progression of epithelial-mesenchymal transition and conferred chemoresistance, whereas its overexpression reversed the effect. In conclusion, loss of ZNF677 protein expression is common in Middle Eastern CRC and contributes to the prediction of biological aggressiveness of CRC. Therefore, ZNF677 could not only serve as a marker in predicting clinical prognosis in patient with CRC but also as a potential biomarker for personalized targeted therapy.

Postoperative complications after colorectal cancer surgery and the association with long-term survival

BACKGROUND

Complications after colorectal cancer surgery can worsen long-term survival. The aim of this nationwide study was to determine the impact of different types of complications on overall survival (OS) and conditional survival if still alive one year postoperatively (CS-1) after colorectal cancer surgery.

MATERIALS AND METHODS

All patients registered in the Dutch ColoRectal Audit after resection of primary colorectal cancer between 2011 and 2017 and with known survival status were included. Multivariable Cox regression models were used to assess the association of complications with OS and CS-1, thereby calculating the Hazard Ratio (HR) with 95% Confidence Interval.

RESULTS

43,908 colon and 16,955 rectal cancer patients were included. Median follow-up time was 66.1 and 66.5 months, respectively. Five-year OS after colon cancer resection was 73.2% without complications, and 65.4% with surgical, 52.9% with non-surgical and 51.8% with combined type of complications (p < 0.001). Corresponding 5-year OS for rectal cancer patients was 76.9%, 72.7%, 64.9%, and 63.2% (p < 0.001). In colon cancer, multivariable analyses revealed HR 1.198 (1.136-1.264) for surgical, HR 1.489 (1.423-1.558) for non-surgical and HR 1.590 (1.505-1.681) for combined type of complications. For rectal cancer, these HRs were 1.193 (1.097-1.2297), 1.456 (1.346-1.329), and 1.489 (1.357-1.633). Surgical complications were associated with worse CS-1 in rectal cancer (HR 1.140 (1.050-1.260), but not in colon cancer (HR 1.007 (0.943-1.075)).

CONCLUSION

Non-surgical complications have higher impact on survival than surgical complications. The impact of surgical complications on survival was still measurable after surviving the first year in rectal cancer but not in colon cancer patients.

Statin Use and Long-Term Mortality after Rectal Cancer Surgery

BACKGROUND

The current study aimed to assess the association between regular statin therapy and postoperative long-term all-cause and cancer-specific mortality following curative surgery for rectal cancer. The hypothesis was that statin exposure would be associated with better survival.

METHODS

Patients with stage I-III rectal cancer undergoing surgical resection with curative intent were extracted from the nationwide, prospectively collected, Swedish Colorectal Cancer Register (SCRCR) for the period from January 2007 and October 2016. Patients were defined as having ongoing statin therapy if they had filled a statin prescription within 12 months before and after surgery. Cox proportional hazards models were employed to investigate the association between statin use and postoperative five-year all-cause and cancer-specific mortality.

RESULTS

The cohort consisted of 10,743 patients who underwent a surgical resection with curative intent for rectal cancer. Twenty-six percent (n = 2797) were classified as having ongoing statin therapy. Statin users had a considerably decreased risk of all-cause (adjusted hazard ratio (HR) 0.66, 95% confidence interval (CI): 0.60-0.73, p < 0.001) and cancer-specific (adjusted HR 0.60, 95% CI: 0.47-0.75, p < 0.001) mortality up to five years following surgery.

CONCLUSIONS

Statin use was associated with a lower risk of both all-cause and rectal cancer-specific mortality following curative surgical resections for rectal cancer. The findings should be confirmed in future prospective clinical trials.

Frailty and health related quality of life three months after non-metastatic colorectal cancer diagnosis in older patients: A multi-centre prospective observational study

BACKGROUND

Health related quality of life (HRQL) is an important outcome measure in geriatric oncology. Surgery is the main treatment for colorectal cancer (CRC) but has been associated with a loss of HRQL in older patients. This study aimed to identify determinants for a decreased HRQL at three months after CRC diagnosis.

METHOD

This multi-centre observational cohort study (NCT04443816) included 273 patients aged ≥70 years diagnosed with non-metastatic CRC. A multi-domain frailty screening was performed in each patient. A decreased HRQL was defined as a mean difference ≥ 10 on the EORTC QLQ-C30 questionnaire between baseline and three months after CRC diagnosis. Determinants of a decreased HRQL were analysed using multivariable logistic regression.

RESULTS

A decrease in HRQL occurred in 63 patients (23.1%). Non-surgical patients had the highest risk of decreased HRQL three months after diagnosis (adjusted odds ratio (OR) 6.4 (95% confidence interval (CI) 2.0-19.8)). The Charlson Comorbidity Index (CCI) (aOR 2.3 (95% (CI) 1.2-4.2)), the American Association of Anesthesiologists class (aOR 2.6 (95%CI 1.4-4.9)), impaired daily functioning (aOR 2.7 (95%CI 1.3-5.6)) and dependent living (aOR 1.9 (95%CI 1.1-4.5)) were associated with a decreased HRQL, mainly caused by non-surgical patients. In surgical patients, a major postoperative complication was a strong determinant of decreased HRQL and was associated with preoperative comorbidity and cognitive impairment (aOR 4.0 (95%CI 1.9-8.8)).

CONCLUSION

Frailty characteristics are highly prevalent in older patients at time of CRC diagnosis but not strongly associated with a decreased HRQL after three months. Non-surgical patients and patients with major postoperative complications had the highest risk of decreased HRQL. Registered at clinicaltrials.gov trial number: NCT04443816.

Survival of surgical and non-surgical older patients with non-metastatic colorectal cancer: A population-based study in the Netherlands

BACKGROUND

Surgery is the primary treatment for non-metastatic colorectal cancer (CRC) but is omitted in a proportion of older patients. Characteristics and prognosis of non-surgical patients are largely unknown.

OBJECTIVE

To examine the characteristics and survival of surgical and non-surgical older patients with non-metastatic CRC in the Netherlands.

METHODS

All patients aged ≥70 years and diagnosed with non-metastatic CRC between 2014 and 2018 were identified in the Netherlands Cancer Registry. Patients were divided based on whether they underwent surgery or not. Three-year overall survival (OS) and relative survival (RS) were calculated for both groups separately. Relative survival and relative excess risks (RER) of death were used as measures for cancer-related survival.

RESULTS

In total, 987/20.423 (5%) colon cancer patients and 1.459/7.335 (20%) rectal cancer patients did not undergo surgery. Non-surgical treatment increased over time from 3.7% in 2014 to 4.8% in 2018 in colon cancer patients (P = 0.01) and from 17.1% to 20.2% in rectal cancer patients (P = 0.03). 3 year RS was 91% and 9% for surgical and non-surgical patients with colon cancer, respectively. For rectal cancer patients this was 93% and 37%, respectively. In surgical patients, advanced age (≥80 years) did not decrease RS (colon; RER 0.9 (0.7-1.0), rectum; RER 0.9 (0.7-1.1)). In non-surgical rectal cancer patients, higher survival rates were observed in patients treated with chemoradiotherapy (OS 56%, RS 65%), or radiotherapy (OS 19%, RS 27%), compared to no treatment (OS 9%, RS 10%).

CONCLUSION

Non-surgical treatment in older Dutch CRC patients has increased over time. Because survival of patients with colon cancer is very poor in the absence of surgery, this treatment decision must be carefully weighed. (Chemo-)radiotherapy may be a good alternative for rectal cancer surgery in older frail patients.

A Prediction Model for Severe Complications after Elective Colorectal Cancer Surgery in Patients of 70 Years and Older

Introduction Older patients have an increased risk of morbidity and mortality after colorectal cancer (CRC) surgery. Existing CRC surgical prediction models have not incorporated geriatric predictors, limiting applicability for preoperative decision-making. The objective was to develop and internally validate a predictive model based on preoperative predictors, including geriatric characteristics, for severe postoperative complications after elective surgery for stage I-III CRC in patients ≥70 years.

PATIENTS AND METHODS

A prospectively collected database contained 1088 consecutive patients from five Dutch hospitals (2014-2017) with 171 severe complications (16%). The least absolute shrinkage and selection operator (LASSO) method was used for predictor selection and prediction model building. Internal validation was done using bootstrapping.

RESULTS

A geriatric model that included gender, previous DVT or pulmonary embolism, COPD/asthma/emphysema, rectal cancer, the use of a mobility aid, ADL assistance, previous delirium and polypharmacy showed satisfactory discrimination with an AUC of 0.69 (95% CI 0.73-0.64); the AUC for the optimism corrected model was 0.65. Based on these predictors, the eight-item colorectal geriatric model (GerCRC) was developed.

CONCLUSION

The GerCRC is the first prediction model specifically developed for older patients expected to undergo CRC surgery. Combining tumour- and patient-specific predictors, including geriatric predictors, improves outcome prediction in the heterogeneous older population.

Colorectal Cancer in Elderly Patients with Surgical Indication: State of the Art, Current Management, Role of Frailty and Benefits of a Geriatric Liaison

Six out of every 10 new colorectal cancer (CRC) diagnoses are in people over 65 years of age. Current standardized surgical approaches have proved to be tolerable on the elderly population, although post-operative complications are more frequent than in the younger CRC population. Frailty is common in elderly CRC patients with surgical indication, and it appears to be also associated with an increase of post-operative complications. Fast-track pathways have been developed to assure and adequate post-operative recovery, but comprehensive geriatric assessments (CGA) are still rare among the preoperative evaluation of elderly CRC patients. This review provides a thorough study of the effects that a CGA assessment and a geriatric intervention have in the prognosis of CRC elderly patients with surgical indication.

Survival outcomes of elderly patients referred to the lower gastrointestinal 2-week wait service

AIM

The benefit to elderly patients (≥80 years old) of referral to the resource-intensive lower gastrointestinal 2-week wait (LGI-2WW) pathway is unknown. The aim of this study was to investigate the survival outcome of elderly patients referred to a LGI-2WW service.

METHOD

This study comprised a retrospective analysis of a prospectively gathered database of patients referred to a single-centre LGI-2WW service and conformed to STROBE guidelines. The primary outcome was all-cause mortality. Statistical analysis was performed with the chi-square test and Kaplan-Meier survival curves compared with the generalized log-rank test.

RESULTS

A total of 10 155 patients referred to the LGI-2WW service between 1 January 2015 and 31 December 2018 were analysed; median follow-up was 37.0 months (range 0-66 months). Six hundred and ninety one cancers were diagnosed (6.8% detection rate); 551 (80%) of these were lower GI cancers (LGICas) [517 (75%) colorectal; 34 (5%) anal]. Forty per cent of LGICas were diagnosed via the LGI-2WW service. Patients aged ≥80 years with LGICa were more likely to be treated with palliative intent [age <80 years, 92/360 (26%) vs. age ≥80 years, 105/191 (55%); p < 0.001]. LGICa patients aged <85 years had a survival difference between those treated with curative intent (LGICa-Cur) or palliative intent (LGICa-Pal) (median survival for patients aged 80-84 years: LGICa-Cur 57 months vs. LGICa-Pal 15 months; p < 0.001). Patients aged ≥85 years did not have any survival difference by treatment intent (median survival for patients aged 85-89 years: LGICa-Cur 31 months vs. LGICa-Pal 16 months; p = 0.062; median survival for patients aged ≥90 years: LGICa-Cur 14 months vs. LGICa-Pal 16 months; p = 0.703).

CONCLUSION

Patients with LGICa aged ≥85 years have similar survival whether treated with curative or palliative intent. This can inform management discussions with patients and LGI-2WW referral pathway prioritization approaches.

Invasive carcinoma versus pseudoinvasion: interobserver variability in the assessment of left-sided colorectal polypectomies

OBJECTIVES

Misplaced epithelium in adenomas can occasionally be difficult to distinguish from invasive adenocarcinoma. We evaluated interobserver variability in the assessment of left-sided colon polypectomies for pseudoinvasion versus invasive adenocarcinoma and further investigated relevant histological findings.

METHODS

28 consecutive left-sided colon polyps with the keywords "pseudoinvasion", "epithelial misplacement", "herniation", "prolapse" or "invasive adenocarcinoma" were collected from 28 patients and reviewed by eight gastrointestinal pathologists. Participants assessed stromal hemosiderin, lamina propria/eosinophils surrounding glands, desmoplasia, high grade dysplasia/intramucosal adenocarcinoma and margin status and rendered a diagnosis of pseudoinvasion, invasive adenocarcinoma, or both.

RESULTS

Agreement among pathologists was substantial for desmoplasia (κ=0.70), high grade dysplasia/intramucosal adenocarcinoma (κ=0.66), invasive adenocarcinoma (κ=0.63) and adenocarcinoma at the margin (κ=0.65). There was moderate agreement for hemosiderin in stroma (κ=0.53) and prolapse/pseudoinvasion (κ=0.50). Agreement was low for lamina propria/eosinophils around glands (κ=0.12). For invasive adenocarcinoma, seven or more pathologists agreed in 24 of 28 cases (86%), and there was perfect agreement in 19/28 cases (68%). For pseudoinvasion, seven or more pathologists agreed in 19 of 28 cases (68%), and there was perfect agreement in 16/28 cases (57%).

CONCLUSION

Moderate to substantial, though imperfect, agreement was achieved in the distinction of pseudoinvasion from invasive carcinoma.

Age disparities in stage-specific colon cancer survival across seven countries: An International Cancer Benchmarking Partnership SURVMARK-2 population-based study

We sought to understand the role of stage at diagnosis in observed age disparities in colon cancer survival among people aged 50 to 99 years using population-based cancer registry data from seven high-income countries: Australia, Canada, Denmark, Ireland, New Zealand, Norway and the United Kingdom. We used colon cancer incidence data for the period 2010 to 2014. We estimated the 3-year net survival, as well as the 3-year net survival conditional on surviving at least 6 months and 1 year after diagnosis, by country and stage at diagnosis (categorised as localised, regional or distant) using flexible parametric excess hazard regression models. In all countries, increasing age was associated with lower net survival. For example, 3-year net survival (95% confidence interval) was 81% (80-82) for 50 to 64 year olds and 58% (56-60) for 85 to 99 year olds in Australia, and 74% (73-74) and 39% (39-40) in the United Kingdom, respectively. Those with distant stage colon cancer had the largest difference in colon cancer survival between the youngest and the oldest patients. Excess mortality for the oldest patients with localised or regional cancers was observed during the first 6 months after diagnosis. Older patients diagnosed with localised (and in some countries regional) stage colon cancer who survived 6 months after diagnosis experienced the same survival as their younger counterparts. Further studies examining other prognostic clinical factors such as comorbidities and treatment, and socioeconomic factors are warranted to gain further understanding of the age disparities in colon cancer survival.

Determining the Risk Factors Affecting on Death Due to Colorectal Cancer Progression: Survival Analysis in the Presence of Competing Risks

PURPOSE

In survival analysis, some patients may be at risk of more than one event, for example cancer-related death and cancer-unrelated death. In this case, if the aim of study becomes to assess the impact of risk factors on different causes of death, the competing risk model should be used rather than classical survival model. The aim of the present study is to determine the risk factors for related and unrelated mortality in patients with colorectal cancer using competing risk regression models.

METHODS

The present retrospective cohort study was carried out on 310 CRC patients. Death due to cancer progression was considered as the interest event, and death due to unrelated cancer was considered as a competing event. Two most popular methods, cause-specific and subdistribution hazard regression model, were used to determine the effect of covariates on incidence and cause-specific hazard. Data analysis was performed using R3.6.2 software and cmprsk and survival packages.

RESULTS

The mean (SD) of patients' age was 55.84 ± 13.2 years and 53.9% of them were male. BMI, T and N stage had a significant effect on both incidence and cause specific hazard of cancer-related death.

CONCLUSION

The results of this study showed that cancer-related death is strongly correlated with under-weight (BMI < 18.5) and advanced clinical stage of the disease in patients with colorectal cancer. So, in the presence of competing events, both types of regression hazard models should be applied to permit a full understanding of the impact of covariates on the incidence and the rate of occurrence of each outcome.

One-year excess mortality and treatment in surgically treated patients with colorectal cancer: A EURECCA European comparison

BACKGROUND

Mortality in the first postoperative year represents an accurate reflection of the perioperative risk after colorectal cancer surgery. This research compares one-year mortality after surgery divided into three age-categories (18-64, 65-74, ≥75 years), focusing on time trends and comparing treatment strategies.

MATERIAL

Population-based data of all patients diagnosed and treated surgically for stage I-III primary colorectal cancer from 2007 to 2016, were collected from Belgium, the Netherlands, Norway, and Sweden. Stratified for age-category and stage, treatment was evaluated, and 30-day, one-year and one-year excess mortality were calculated for colon and rectal cancer separately. Results were evaluated over two-year time periods.

RESULTS

Data of 206,024 patients were analysed. Postoperative 30-day and one-year mortality reduced significantly over time in all countries and age-categories. Within the oldest age category, in 2015-2016, one-year excess mortality varied from 9% in Belgium to 4% in Sweden for colon cancer and, from 9% in Belgium to 3% in the other countries for rectal cancer. With increasing age, patients were less likely to receive additional therapy besides surgery. In Belgium, colon cancer patients were more often treated with adjuvant chemotherapy (p < 0.001). For neoadjuvant treatment of rectal cancer, patients in Belgium and Norway were mostly treated with chemoradiotherapy. In the Netherlands and Sweden, radiotherapy alone was preferred (p < 0.001).

CONCLUSIONS

Despite improvement over time in all countries and age-categories, substantial variation exists in one-year postoperative mortality. Differences in one-year excess postoperative mortality could be due to differences in treatment strategies, highlighting the consequences of under- and over-treatment on cancer survival.

Tumour-stroma ratio outperforms tumour budding as biomarker in colon cancer: a cohort study

The tumour-stroma ratio (TSR) and tumour budding (TB) are two high-risk factors with potential to be implemented in the next TNM classification. The aim of the current study was to evaluate the practical application of the two biomarkers based on reproducibility, independency and prognostic value. Patients diagnosed with stage II or III colon cancer who underwent surgery between 2005 and 2016 were included. Both TSR and TB were scored on haematoxylin and eosin-stained tissue sections. The TSR, based on the relative amount of stroma, was scored in increments of 10%. TB was scored following the consensus guidelines; a bud was defined as ≤ 4 tumour cells. For analysis, three categories were used. Cohen's kappa was used for reproducibility. The prognostic value was determined with survival analysis. In total, 246 patients were included. The TSR distribution was N = 137 (56%) stroma-low and N = 109 (44%) stroma-high. The TB distribution was TB-low N = 194 (79%), TB-intermediate N = 35 (14%) and TB-high N = 17 (7%). The reproducibility of the TSR was good (interobserver agreement kappa = 0.83 and intraobserver agreement kappa = 0.82), whereas the inter- and intraobserver agreement for scoring TB was moderate (kappa 0.47 and 0.45, respectively). The survival analysis showed an independent prognostic value for disease-free survival for TSR (HR 1.57; 95% CI 1.01-2.44; p = 0.048) and for TB-high (HR 2.01; 95% CI 1.02-3.96; p = 0.043). Based on current results, we suggest the TSR is a more reliable parameter in daily practice due to better reproducibility and independent prognostic value for disease-free survival.

Safety of anastomotic techniques and consequences of anastomotic leakage in patients with colorectal cancer: a single surgeon experience

Introduction

Colorectal cancer is a common type of malignant disease of the digestive tract. Anastomotic leakage (AL) still represents a serious complication in gastrointestinal surgery, associated with high morbidity and mortality.

Methods

We conducted a retrospective case-control study and analyzed a single surgeon’s data about 359 patients treated for colorectal cancer. Patients were divided as follows: Study Group (patients with AL - 37 patients) and Control Group (patients without AL - 322 patients). Surgical and anastomotic technique-related information was processed.

Results

Surgical procedures for right sided colon tumors resulted in a significantly lower rate of anastomotic leakage (P=0.0231). For left sided colectomies end to end handsewn double layer anastomosis presented decreased odds (OR=0.176). For sigmoid segmental resection end to end anastomotic techniques developed low rate of fistula formation (handsewn - OR=0.593, stapled - OR=0.685). Performing Dixon type surgical interventions, anastomotic techniques seemed without influence on anastomotic leak appearance (handsewn and stapled), although distal anastomoses were identified as significant risk factors for fistula formation (P=0.0017). In order to perform subtotal colectomy, side to side sutures (handsewn and stapled) seemed safe choices for anastomotic procedure (P=0.0073). Patient with anastomotic leakage suffered a significantly longer hospital stay (P=0.0079), presented higher rate of surgical reintervention (P=0.0001), increased mortality (P=0.0001) and elevated hospitalization costs (P=0.0079).

Conclusion

Postoperative complications like anastomosis leakage significantly increase hospitalization period, necessity of surgical reintervention, mortality and financial costs. In order to avoid these unpleasant events, bowel anastomoses require standardization during surgery.

Real-world implementation of a geriatric-specific ERAS protocol in patients undergoing colonic cancer surgery

BACKGROUND

The aim of this single-center observational study was to evaluate the impact of implementing Enhanced Recovery After Surgery (ERAS) protocols, combined with systematic geriatric assessment and support, on surgical and oncological outcomes in patients aged 70 or older undergoing colonic cancer surgery.

METHODS

Two groups were formed from an actively maintained database from all patients undergoing laparoscopic colonic surgery for neoplasms during a defined period before (standard group) or after (ERAS group) the introduction of an ERAS program associated with systematic geriatric assessment. The primary outcome was postoperative 90-day morbidity. Secondary outcomes were total length of hospital stay, initiated and completed adjuvant chemotherapy (AC) rate, and 1-year mortality rate.

RESULTS

A total of 266 patients (135 standard and 131 ERAS) were included in the study. Overall 90-day morbidity and mean hospital stay were significantly lower in the ERAS group than in the standard group (22.1% vs. 35.6%, p = 0.02; and 6.2 vs. 9.3 days, p < 0.01, respectively). There were no differences in readmission rates and anastomotic complications. AC was recommended in 114 patients. The rate of initiated treatment was comparable between the groups (66.6% vs. 77.7%, p = 0.69). The rate of completed AC was significantly higher in the ERAS group (50% vs. 20%, p < 0.01) with a lower toxicity rate (57.1% vs. 87.5%, p = 0.002). The 1-year mortality rate was higher in the standard group (7.4% vs. 0.8%, p < 0.01).

CONCLUSIONS

The combination of ERAS protocols and geriatric assessment and support reduces the overall morbidity rate and improves 12-month oncologic outcomes.

Risk prediction models for postoperative outcomes of colorectal cancer surgery in the older population - a systematic review

BACKGROUND

An increasing number of patients with Colorectal Cancer (CRC) is 65 years or older. We aimed to systematically review existing clinical prediction models for postoperative outcomes of CRC surgery, study their performance in older patients and assess their potential for preoperative decision making.

METHODS

A systematic search in Pubmed and Embase for original studies of clinical prediction models for outcomes of CRC surgery. Bias and relevance for preoperative decision making with older patients were assessed using the CHARMS guidelines.

RESULTS

26 prediction models from 25 publications were included. The average age of included patients ranged from 61 to 76. Two models were exclusively developed for 65 and older. Common outcomes were mortality (n = 10), anastomotic leakage (n = 7) and surgical site infections (n = 3). No prediction models for quality of life or physical functioning were identified. Age, gender and ASA score were common predictors; 12 studies included intraoperative predictors. For the majority of the models, bias for model development and performance was considered moderate to high.

CONCLUSIONS

Prediction models are available that address mortality and surgical complications after CRC surgery. Most models suffer from methodological limitations, and their performance for older patients is uncertain. Models that contain intraoperative predictors are of limited use for preoperative decision making. Future research should address the predictive value of geriatric characteristics to improve the performance of prediction models for older patients.

Long-Term Survival and Risk of Institutionalization in Onco-Geriatric Surgical Patients: Long-Term Results of the PREOP Study

OBJECTIVES

To evaluate long-term survival and institutionalization in onco-geriatric surgical patients, and to analyze the association between these outcomes and a preoperative risk score.

DESIGN

Prospective cohort study with long-term follow-up.

SETTING

International and multicenter locations.

PARTICIPANTS

Patients aged 70 years or older undergoing elective surgery for a malignant solid tumor at five centers (n = 229).

MEASUREMENTS

We assessed long-term survival and institutionalization using the Preoperative Risk Estimation for Onco-geriatric Patients (PREOP) score, developed to predict the 30-day risk of major complications. The PREOP score collected data about sex, type of surgery, and the American Society for Anesthesiologists classification, as well as the Timed Up & Go test and the Nutritional Risk Screening results. An overall score higher than 8 was considered abnormal.

RESULTS

We included 149 women and 80 men (median age = 76 y; interquartile range = 8). Survival at 1, 2, and 5 years postoperatively was 84%, 77%, and 56%, respectively. Moreover, survival at 1 year was worse for patients with a PREOP risk score higher than 8 (70%) compared with 8 or lower (91%). Of those alive at 1 year, 43 (26%) were institutionalized, and by 2 years, almost half of the entire cohort (46%) were institutionalized or had died. A PREOP risk score higher than 8 was associated with increased mortality (hazard ratio = 2.6; 95% confidence interval [CI] = 1.7-4.0), irrespective of stage and age, but not with being institutionalized (odds ratios = 1 y, 1.6 [95% CI = .7-3.8]; 2 y, 2.2 [95% CI = .9-5.5]).

CONCLUSION

A high PREOP score is associated with mortality but not with remaining independent. Despite acceptable survival rates, physical function may deteriorate after surgery. It is imperative to discuss treatment goals and expectations preoperatively to determine if they are feasible. Using the PREOP risk score can provide an objective measure on which to base decisions. J Am Geriatr Soc 68:1235-1241, 2020.

Treatment response in elderly patients with advanced colorectal cancer at King Abdulaziz Medical City, Princess Norah Oncology Center, Jeddah

INTRODUCTION

Colorectal carcinoma is the most evident carcinoma in the elderly. Despite its high incidence and mortality rate, there is insufficient research about the best treatment options for colorectal carcinoma.

OBJECTIVE

This study was designed to assess the best treatment modality for colorectal carcinoma in elderly Saudi patients.

METHODS

We conducted a retrospective analysis of medical records at the Princess Norah Oncology Center (PNOC), King Abdulaziz Medical City, Jeddah, Saudi Arabia. We included patients treated at PNOC between 2010 and 2015. Only patients aged above 70 years with advanced colon were included in the study.

RESULTS

The cohort included 57 patients with an average age of 76.51 with 27 alive patients and 30 dead patients. Nonmucinous adenocarcinoma had significant higher mortality (n = 20). Most patients received surgical treatment which was associated with less risk for mortality; however, it was nonsignificant. Surgery was followed by first-line treatment which had a mortality rate of 50%. The least treatment associated with mortality was local liver treatment (n = 0). Survival analysis found that only treatment with significant higher survival was shift to next line of treatment (at least once) [HR = 0.06, 95% CI (0.00, 0.79), P value = 0.03]. Other treatments were not associated with significant mortality reduction. First-line treatment was associated with higher mortality risk; nevertheless, it was nonsignificant.

CONCLUSION

Local radiotherapy and local liver ablation had the least mortality rate. However, in multivariate Cox regression analysis, we found that shift to next line of treatment was associated with the significant high survival rate.

Functional recovery in senior adults undergoing surgery for colorectal cancer: Assessment tools and strategies to preserve functional status

Colorectal cancer is a widely-recognized aging-associated disease. Recent advances in the care of senior colorectal cancer patients has led to similar cancer-related life expectancy for older patients when compared to their younger counterparts. Recent data suggests that onco-geriatric patients place as much value on maintenance of functional independence and quality of life after treatment as they do on the potential improvements in survival that a treatment might offer. As a result, there has been significant interest in the geriatric literature surrounding the concept of "functional recovery," a multidimensional outcome metric that takes into account several domains, including physical, physiologic, psychological, social, and economic wellbeing. This review introduces the concept of functional recovery and highlights a number of predictors of post-treatment functional trajectory, including several office-based tools that clinicians can use to help guide informed decision making surrounding potential treatment options. This review also highlights a number of validated metrics that can be used to assess a patient's progress in functional recovery after surgery. While the timeline of each individual's functional recovery may vary, most data suggests that if patients are to return to their pre-operative functional status, this could occur up to 6 months post-surgery. For those patients identified to be at risk for post-operative functional decline this review also delineates strategies for prehabilitation and rehabilitation that may improve functional outcomes.

Years of Life Lost for Older Patients After Colorectal Cancer Diagnosis

BACKGROUND

An aging population combined with an increased colorectal cancer (CRC) incidence in the older population will increase its prevalence in the elderly, questioning how many years of life are lost (YLLs) in these patients.

PATIENTS AND METHODS

Data from 32,568 Dutch CRC patients ≥ 80 years were used to estimate the number of YLLs after diagnosis, using a reference age-, sex- and year-of-onset-matched cohort derived from national life tables. YLLs were additionally adjusted by comorbidities. Number needed to treat (NNT) was used as measure of surgical effect size.

RESULTS

Surgery was applied in 74.9% of patients leading to 1.3 YLLs, being superior in 86.1% of cases with respect to alternative therapies (YLLs 4.8 years) and resulting in a number of two patients needed to operate to achieve one positive outcome. YLLs and NNTs depended on CRC stage, patient' age and comorbidities. For Stage I-II patients in the best clinical conditions (80-85 years without comorbidities), YLLs increased up to 4.1 years after surgery and up to 8.8 years without surgery (NNT 3). For Stage III patients, the NNT of surgery varied between 2 when they were in the best clinical conditions and 4 when they were older with high comorbidities. In Stage IV patients, the NNT ranged between 6 and 31.

CONCLUSIONS

YLLs represents a novel approach to evaluate CRC prognosis. Stage I-III surgical patients can have a life expectancy similar to that of general population, being the NNT of surgery reasonably small compared with alternatives. Personalized comorbidity data are needed to confirm present findings.

Screening and systematic follow-up for cardiopulmonary comorbidity in elective surgery for colorectal cancer: a randomised feasibility study

BACKGROUND

One third of patients with colorectal cancer (CRC) have comorbidity, which impairs their postoperative outcomes. Scoring systems may predict mortality, but there is limited evidence of effective interventions in high-risk patients. Our aim was to test a trial setup to assess the effect of extra postoperative medical visits and follow-up on 1-year mortality and other outcomes in patients with cardiopulmonary risk factors undergoing elective surgery for colorectal tumours.

METHODS

Patients preoperatively screened positive for cardiopulmonary comorbidity were eligible. On postoperative day 4, they were randomised to either routine follow-up (RFU) or RFU with one extra medical visit and additional visits to the Cardiology and Respiratory Medicine Clinics 1 and 3 months postoperatively. The primary outcome measure was 1-year mortality; secondary outcome measures were length of stay (LOS), complications, and readmissions.

RESULTS

Of 673 screened patients 326 (48%) were found eligible, 108 declined participation, and 198 were randomised. Postoperative medical problems and/or need for intervention were found in 15-23% of the patients at the extra medical visits. The 90-day mortality was 0 and the 1-year mortality only 2.6% with no differences between the two groups. LOS and complication rates did not differ, but there were significantly fewer readmissions in the intervention group.

CONCLUSIONS

The 1-year mortality after elective CRC surgery was low, even in the presence of cardiopulmonary risk factors. There was no evidence of reduced mortality with additional medical follow-up in these patients.

TRIAL REGISTRATION

ClinicalTrials.gov NCT02328365 registered 31 December 2014 (retrospectively registered).

Multimodal prehabilitation to reduce the incidence of delirium and other adverse events in elderly patients undergoing elective major abdominal surgery: An uncontrolled before-and-after study

Background

Delirium is a common and serious complication in elderly patients undergoing major abdominal surgery, with significant adverse outcomes. Successful strategies or therapies to reduce the incidence of delirium are scarce. The objective of this study was to assess the role of prehabilitation in reducing the incidence of delirium in elderly patients.

Methods

A single-center uncontrolled before-and-after study was conducted, including patients aged 70 years or older who underwent elective abdominal surgery for colorectal carcinoma or an abdominal aortic aneurysm between January 2013 and October 2015 (control group) and between November 2015 and June 2018 (prehabilitation group). The prehabilitation group received interventions to improve patients’ physical health, nutritional status, factors of frailty and preoperative anaemia prior to surgery. The primary outcome was incidence of delirium, diagnosed with the DSM-V criteria or the confusion assessment method. Secondary outcomes were additional complications, length of stay, unplanned ICU admission, length of ICU stay, readmission rate, institutionalization, and in-hospital or 30-day mortality.

Result

A total of 360 control patients and 267 prehabilitation patients were included in the final analysis. The mean number of prehabilitation days was 39 days. The prehabilitation group had a higher burden of comorbidities and was more physically and visually impaired at baseline. At adjusted logistic regression analysis, delirium incidence was reduced significantly from 11.7 to 8.2% (OR 0.56; 95% CI 0.32–0.98; P = 0.043). No statistically significant effects were seen on secondary outcomes.

Conclusion

Current prehabilitation program is feasible and safe, and can reduce delirium incidence in elderly patients undergoing elective major abdominal surgery. This program merits further evaluation.

Trial registration

Dutch Trial Registration, NTR5932.

The impact of colorectal surgery on health-related quality of life in older functionally dependent patients with cancer - A longitudinal follow-up study

BACKGROUND

Older patients who are functionally compromised or frail may be at risk for loss of quality of life (QoL) after colorectal cancer (CRC) surgery. We prospectively studied health-related QoL (HRQoL) and its association with functional dependency on multiple time points before and after CRC surgery.

METHODS

Included were patients aged 70 years and older who underwent elective CRC surgery between 2014 and 2015 in combination with an oncogeriatric care path. HRQoL (EORTC QLQ-C30 and CR38) and activities of daily living (ADL, Barthel Index) were measured at four time-points; prior to (T0) and at 3 (T3), 6 (T6), and 12 (T12) months after surgery. Functional dependency was defined as a Barthel Index <19. Using mixed-model regression analysis associations between dependency, time and HRQoL outcomes were tested and corrected for confounders.

RESULTS

Response rate was 67% (n = 106) to two or more questionnaires; 26 (25%) patients were functionally dependent. Overall, functionally independent patients experienced a higher HRQoL than dependent patients. Compared to T0, significant and clinically relevant improvements in HRQoL after surgery were observed in functionally dependent patients: better role functioning, a higher global health, a higher summary score, less fatigue and less gastrointestinal problems (p < .05). In functional independent patients, we observed no clinically relevant change in HRQoL.

CONCLUSION

Colorectal surgery embedded in geriatric-oncological care has a positive impact on HRQoL in older functionally dependent patients with cancer. Moderate functional dependency should not be considered a generic reason for withholding surgical treatment. Information derived from this study could be used in shared decision making.

A multicomponent prehabilitation pathway to reduce the incidence of delirium in elderly patients in need of major abdominal surgery: study protocol for a before-and-after study

BACKGROUND

Due to the increase in elderly patients who undergo major abdominal surgery there is a subsequent increase in postoperative complications, prolonged hospital stays, health-care costs and mortality rates. Delirium is a frequent and severe complication in the 'frail' elderly patient. Different preoperative approaches have been suggested to decrease incidence of delirium by improving patients' baseline health. Studies implementing these approaches are often heterogeneous, have a small sample and do not provide high-quality or successful strategies. The aim of this study is to prevent postoperative delirium and other complications by implementing a unique multicomponent and multidisciplinary prehabilitation program.

METHODS

This is a single-center controlled before-and-after study. Patients aged ≥70 years in need of surgery for colorectal cancer or an abdominal aortic aneurysm are considered eligible. Baseline characteristics (such as factors of frailty, physical condition and nutritional state) are collected prospectively. During 5 weeks prior to surgery, patients will follow a prehabilitation program to optimize overall health, which includes home-based exercises, dietary advice and intravenous iron infusion in case of anaemia. In case of frailty, a geriatrician will perform a comprehensive geriatric assessment and provide additional preoperative interventions when deemed necessary. The primary outcome is incidence of delirium. Secondary outcomes are length of hospital stay, complication rate, institutionalization, 30-day, 6- and 12-month mortality, mental health and quality of life. Results will be compared to a retrospective control group, meeting the same inclusion and exclusion criteria, operated on between January 2013 and October 2015. Inclusion of the prehabilitation cohort started in November 2015; data collection is ongoing.

DISCUSSION

This is the first study to investigate the effect of prehabilitation on postoperative delirium. The aim is to provide evidence, based on a large sample size, for a standardized multicomponent strategy to improve patients' preoperative physical and nutritional status in order to prevent postoperative delirium and other complications. A multimodal intervention was implemented, combining physical, nutritional, mental and hematinic optimization. This research involves a large cohort, including patients most at risk for postoperative adverse outcomes.

TRIAL REGISTRATION

The protocol is retrospectively registered at the Netherlands National Trial Register (NTR) number: NTR5932 . Date of registration: 05-04-2016.

Risk factors for cardiovascular mortality in patients with colorectal cancer: a population-based study

BACKGROUND

Patients with colorectal cancer are at increased risk of cardiovascular mortality compared to the general population. The purpose of this study is to identify risk factors of cardiovascular mortality in patients with colorectal cancer.

METHODS

A retrospective review of the Surveillance Epidemiology and End Results (SEER) database was performed between 2010 and 2014. Standardized Mortality Ratios (SMRs) for cardiovascular mortality were calculated by comparing the number of expected deaths in the United States according to the National Center for Health Statistics (ICD-10 codes I00-I99) to the number of observed deaths in the database. Logistic regression was used to identify independent risk factors.

RESULTS

Overall, 164,719 patients were identified (mean age at diagnosis 67 ± 13.9 years, 52.7% males, 47.3% females), of which 4854 (2.9%) died from cardiovascular disease. The majority of cardiovascular deaths occurred during the first year after diagnosis (2658, 54.8%). SMRs for cardiovascular mortality were 11.7 (95% CI 11.3-12) among all patients, 12.1 (95% CI 11.7-12.6) for male patients and 11.1 (95% CI 10.6-11.6) for female patients, with SMRs being higher for younger patients. Older age, male sex, African-American race, elevated CEA and not undergoing curative surgery were independent risk factors of cardiovascular mortality in patients with colorectal cancer.

CONCLUSION

Patients with colorectal cancer are associated with an increased risk of cardiovascular death, especially during the first year after diagnosis. Older age, male sex, African-American race, elevated CEA and not undergoing curative surgery are independent risk factors of cardiovascular death.

The Prognostic Value of a Geriatric Risk Score for Older Patients with Colorectal Cancer

INTRODUCTION

VMS is a Dutch risk assessment tool for hospitalized older adults that includes a short evaluation of four geriatric domains: risk for delirium, risk for undernutrition, risk for physical impairments, and fall risk. We investigated whether the information derived from this tool has prognostic value for outcomes of colorectal surgery.

METHODS

All consecutive patients over age 70 years who underwent elective colorectal cancer surgery in three Dutch hospitals (2014-2016) were studied. The presence of risk was scored prior to surgery and per geriatric domain as either 0 (risk absent) or 1 (risk present). The total number of geriatric risk factors was summed. The primary outcome was long-term survival. Secondary outcomes were postoperative complications, including delirium. Cox proportional hazards models were used to evaluate the sumscore and risk factors associated with overall survival.

RESULTS

Five hundred fifty patients were included. Median age was 76.5 years, and median follow-up was 870 days. Patients with intermediate (1-2) or high (3-4) sumscore were independently associated with lower overall survival, with hazard ratio (HR) of 1.9 [95% confidence interval (CI) 1.1-3.5; p = 0.03] and 8.7 (95% CI 4.0-19.2; p < 0.001), respectively. Sumscores were also associated with postoperative complications (intermediate sumscore OR 1.8; 95% CI 1.2-2.7; high sumscore OR 2.4; 95% CI 1.02-5.5).

CONCLUSIONS

This easy-to-use geriatric sumscore has strong associations with long-term outcome and morbidity after colorectal cancer surgery. This information may be included in risk models for morbidity and mortality and can be used in shared decision-making.

Long-Term Survival in Octogenarians After Surgical Treatment for Colorectal Cancer: Prevention of Postoperative Complications is Key

Background

Whether to treat octogenarians with colorectal cancer (CRC) in the same manner as younger patients remains a challenging issue. The purpose of this study was to analyse postoperative complications and long-term survival in a consecutive cohort of octogenarians who were surgically treated for CRC.

Methods

Octogenarians with primary CRC suitable for curative surgery between January 2008 and December 2011 were included. Data about comorbidities, tumour stage, and complications were retrospectively collected from patient files. Data about survival were retrieved with use of the Dutch database for persons and addresses. To identify factors associated with severe postoperative complications and postoperative survival, logistic regression analyses, and Cox regression analyses were performed. Odds ratios and hazard ratios (HR) with 95% confidence intervals (CI) were estimated.

Results

In a series of 108 octogenarians, median age was 83 years (range 80–94 years). Median follow-up was 47 (range 1–107) months. Major postoperative complications occurred in 25% of the patients. No risk factors for development of severe postoperative complications could be identified. The 30-day mortality was 7%; 1- and 5-year mortality was 19% and 56%, respectively. Overall median survival was 48 months: 66 months in patients without complications versus 13 months in patients with postoperative complications. Postoperative complications were most predictive of decreased survival (HR 3.16; 95% CI 1.79–5.59), even including tumour characteristics, comorbidity, and emergency surgery.

Conclusions

Long-term survival in octogenarians deemed fit for surgery is reasonably good. Prevention of major postoperative complications could further improve clinical outcome.