Use of the pre-operative shuttle walk test to predict morbidity and mortality after elective major colorectal surgery

Development and external validation of preoperative clinical prediction models for postoperative outcomes including preoperative aerobic fitness in patients approaching elective colorectal cancer surgery

INTRODUCTION

Preoperative aerobic fitness is associated with postoperative outcomes after elective colorectal cancer (CRC) surgery. This study aimed to develop and externally validate two clinical prediction models incorporating a practical test to assess preoperative aerobic fitness to distinguish between patients with and without an increased risk for 1) postoperative complications and 2) a prolonged time to in-hospital recovery of physical functioning after elective colorectal cancer (CRC) surgery.

MATERIALS AND METHODS

Models were developed using prospective data from 256 patients and externally validated using prospective data of 291 patients. Postoperative complications were classified according to Clavien-Dindo. The modified Iowa level of assistance scale (mILAS) was used to determine time to postoperative in-hospital physical recovery. Aerobic fitness, age, sex, body mass index, American Society of Anesthesiologists (ASA) classification, neoadjuvant treatment, surgical approach, tumour location, and preoperative haemoglobin level were potential predictors. Areas under the curve (AUC), calibration plots, and Hosmer-Lemeshow tests evaluated predictive performance.

RESULTS

Aerobic fitness, sex, age, ASA, tumour location, and surgical approach were included in the final models. External validation of the model for complications and postoperative recovery presented moderate to fair discrimination (AUC 0.666 (0.598-0.733) and 0.722 (0.651-0.794), respectively) and good calibration. High sensitivity and high negative predictive values were observed in the lower predicted risk categories (<40 %).

CONCLUSION

Both models identify patients with and without an increased risk of complications or a prolonged time to in-hospital physical recovery. They might be used for improving patient-tailored preoperative risk assessment and targeted and cost-effective application of prehabilitation interventions.

Geriatric Assessment in Colorectal Surgery: A Systematic Review

INTRODUCTION

The prevalence of colorectal surgery among older adults is expected to rise due to the aging population. Geriatric conditions (e.g., frailty) are risk factors for poor surgical outcomes. The goal of this systematic review is to examine how current literature describes geriatric assessment interventions in colorectal surgery and associated outcomes.

METHODS

Systematic searches of Ovid MEDLINE, Cochrane Library, CINAHL, Embase, and Web of Science were completed. Review was performed according to Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines and prospectively registered in PROSPERO, the international prospective register of systematic reviews in health and social care. All cohort studies and randomized trials of adult colorectal surgery patients where geriatric assessment was performed were included. Geriatric assessment with/without management interventions were identified and described.

RESULTS

Seven-hundred ninety-three studies were identified. Duplicates (197) were removed. An additional 525 were excluded after title/abstract review. After full-text review, 20 studies met the criteria. Reference list review increased final total to 25 studies. All 25 studies were cohort studies. No randomized clinical trials were identified. Heterogeneous assessments were organized into geriatrics domains (mind, mobility, medications, matters most, and multi-complexity). Incomplete evaluations across geriatric domains were performed with few studies describing the use of assessments to impact management decisions.

CONCLUSIONS

There are no randomized trials assessing the impact of geriatric assessment to tailor management strategies and improve outcomes in colorectal surgery. Few studies performed assessments to evaluate the geriatric domain matters most. These findings represent a gap in evidence for the efficacy of geriatric assessment and management strategies in colorectal surgical care.

Changes in Self-Reported and Device-Measured Physical Activity Before Abdominal Resection Surgery: A Meta-Analysis

OBJECTIVE

To determine the effect of interventions on physical activity levels of patients awaiting abdominal resection surgery using self-reported as well as device-measured outcome measures.

DATA SOURCE

PubMed and EMBASE databases were searched on the 18th of April 2023 up to April 2023 for studies on interventions to promote physical activity during the preoperative phase.

REVIEW METHODS

Studies were included if pre- and post-intervention physical activity was measured between diagnosis and abdominal surgery. Risk of bias was assessed by the Physiotherapy Evidence Database (PEDro) assessment tool for trials. Meta-analyses were performed to assess the effect of the pre-surgery activity promoting interventions on self-reported and device-measured physical activity.

RESULTS

Seventeen studies were included in the analysis with 452 subjects in the intervention groups. The random-effect meta-analysis showed a moderate improvement in intervention groups measures in pre-surgery physical activity levels compared to the baseline (SMD = 0.67, [CI = 0.30;1.03], I2 = 79%). The self-reported subgroup meta-analysis showed the largest increase in performed physical activity, (SMD = 0.78, [CI = 0.4;1.15], I2 = 79%) whilst non-significant increase was shown in the device-measured subgroup (SMD = 0.16, [CI = -0.64;0.97], I2 = 58%).

CONCLUSION

Increasing physical activity in the preoperative phase is feasible. Self-reported physical activity outcome measures show larger effects compared to device-measured outcome measures. More high-quality research should be performed utilizing objective measures.

Chinese (Mandarin) translation of the incremental shuttle walk test and its validity and reliability: A cross-sectional study

BACKGROUND/PURPOSE

To date, there are no published validated Chinese versions of the incremental shuttle walk test (ISWT) instructions despite its wide clinical applications. Translation of the Chinese ISWT instruction is done in an ad-hoc manner within the Chinese-speaking populations, affecting the test's reliability and validity since translation can differ significantly between individuals. This warrants the need for psychometric testing of such translation.

OBJECTIVES

To develop a Chinese (Mandarin) version of the ISWT instructions (ISWT-CHN) that is conceptually equivalent to the original English version (ISWT-ENG) and establish its reliability and validity.

METHODS

Forward and backward translations from the ISWT-ENG were done to generate the ISWT-CHN. Face and content validity was determined during the translation process. Intra-rater and inter-rater reliability of the ISWT-CHN, construct and criterion validity were established by analysing the ISWT and the gold standard cardiopulmonary exercise test results.

RESULTS

The Item-Content validity index (I-CVI), Scale-level-Content validity index (S-CVI), and content validity ratio (CVR) of the ISWT-CHN were 1.0. Intra-class Correlation Coefficient (ICC) for inter-rater reliability between two raters were excellent (ICC = 0 . 99 , 95% CI 0.97-1.0, p < 0 . 001 ; SEM = 0 . 85 m, MDC = 2 . 35 m). The intra-rater reliability of both Raters A (ICC = 0 . 92 , 95% CI 0.53-0.98, p = 0 . 003 ; SEM = 35 m, MDC = 97 m) and B (ICC = 0 . 90 , 95% CI 0.76-0.96, p < 0 . 001 ; SEM = 32 m, MDC = 88 m) were good. In a sample of 32 healthy participants, both ISWT-CHN and ISWT-ENG instruction results showed low-positive correlations with the VO2 max determined from the cardiopulmonary exercise test (r = 0.439, p < 0 . 001 ; r = 0 . 448 , p < 0 . 001 ). There is a very high correlation between ISWT-ENG and ISWT-CHN results with no statistically significant differences (r = 0 . 967 , p < 0 . 001 ). The construct and criterion validity of the ISWT-CHN were established.

CONCLUSION

This study developed the ISWT-CHN and showed that it is a valid and reliable measure conceptually comparable to the ISWT-ENG. It will benefit the determination of functional exercise capacity in Chinese-speaking populations.

KEY MESSAGES

•This study is aimed to develop a Chinese (Mandarin) version of the ISWT instructions.•The ISWT Chinese translation is valid and reliable that is conceptually comparable to the original English instruction.•The translated ISWT-Chinese instruction will enable the use of ISWT among the Chinese-speaking populations.

Preoperative functional capacity and postoperative outcomes following abdominal and pelvic cancer surgery: a systematic review and meta-analysis

BACKGROUND

There is clinical uncertainty regarding an association between preoperative functional capacity of cancer patients, and postoperative outcomes. The aim of this systematic review and meta-analysis is to investigate whether poor performance on preoperative six-minute walk test (6MWT) or five-times sit to stand test (5STS) is associated with worse postoperative complication rates and prolonged length of hospital stay (LOS) in cancer patients.

METHODS

An electronic search was performed from earliest available record to 26th February 2021 in MEDLINE, Embase and AMED. Studies investigating the association between preoperative physical function (measured using either 6MWT or 5STS) and postoperative outcomes (complications and LOS) in patients with gastrointestinal, abdominal and pelvic cancers were included. Risk of bias was assessed using the Quality in Prognosis Studies (QUIPS) tool. Where possible, summary odds ratios (OR) or mean differences (MD), and 95% confidence intervals (CI) were calculated using random-effect models.

RESULTS

Five studies (379 patients) were included, of which none utilized the 5STS. Overall, studies were rated as having low to moderate risk of bias. Higher preoperative performance on the 6MWT (≥400 m) was associated with low grade postoperative complications (OR = 0.38; 95% CI = 0.15-0.95) but was not associated with a shorter LOS (MD = 3.29; 95%CI = -1.07-7.66).

CONCLUSION

The available evidence suggests that in cancer patients, a higher preoperative functional capacity may be associated with reduced postoperative complications. Conversely, there is no significant association between preoperative function and LOS. Further high-quality studies are needed in this area, including studies involving 5STS.

Association of Preoperative Physical Activity with Short- and Long-Term Outcomes in Patients Undergoing Palliative Resection for Metastatic Colorectal Cancer: An Inverse Probability of Treatment Weighting Analysis

Simple Summary

Physical activity is linked to the risk and the prognosis of colorectal cancer. However, the impact of preoperative physical activity on postoperative short-term and long-term outcomes is limited. The aim of our study was to elucidate the relationship of preoperative physical activity and postoperative outcomes in metastatic colorectal cancer patients who underwent palliative resection. After the inverse probability of the treatment weighting process, the metabolic equivalent of task < 12 group had a higher postoperative morbidity rate and mortality rate. No significant difference was found in overall survival. In patients undergoing palliative resection for metastatic colorectal cancer, preoperative leisure-time physical activity with the metabolic equivalent of task ≥ 12 was associated with reduced short-term postoperative morbidity and mortality; however, no difference was detected in long-term survival.

Abstract

A lack of physical activity is a generally accepted risk factor for colorectal cancer. However, research on the effect of preoperative physical activity on postoperative and long-term outcomes is limited, especially in patients with stage IV colorectal cancer who underwent palliative surgery. Patients who underwent bowel resection for stage IV primary colorectal cancer between January 1995 and December 2016 were retrospectively enrolled. A total of 2185 patients were divided into two groups according to preoperative leisure-time weekly physical activity as assessed by metabolic equivalent of task (MET) values: MET < 12 (n = 1845) and MET ≥ 12 (n = 340). Inverse probability of treatment weighting (IPTW) was used to reduce imbalance and selection biases between the two groups. After the IPTW process, the MET < 12 group showed a higher postoperative morbidity rate (18.7% vs. 10.6%; p < 0.001) and mortality rate (2.4% vs. 0.6%; p < 0.001) than the MET ≥ 12 group. No significant difference was found in overall survival. Weekly preoperative leisure-time physical activity with MET ≥ 12 was associated with reduced short-term postoperative morbidity and mortality in patients undergoing palliative resection for metastatic colorectal cancer. However, no difference was detected in long-term survival.

Preoperative incremental shuttle walk test for morbidity and mortality prediction in elective major colorectal surgery

Background and Aims:

The incremental shuttle walk test (ISWT) is a simple reproducible and non-invasive test for assessing cardiopulmonary function. The maximum oxygen consumption is less than 10 ml/kg/min for ISWT distance of less than 250 m. This study aimed to evaluate the effectiveness of ISWT in predicting morbidity and mortality in elective colorectal oncosurgery and to find the correlation of ISWT with the Duke Activity Status Index (DASI), Borg dyspnoea score, and peak oxygen uptake (VO₂ max).

Methods:

This prospective study involved 46 patients aged more than 60 years with American Society of Anesthesiologists physical status I and II undergoing elective colorectal surgery under general anaesthesia with an epidural block. ISWT was conducted preoperatively and patients were monitored for 30 days postoperatively. For a comparative analysis, patients were divided into two groups: group 1– who could walk 250 m and group 2 – could not walk 250m. Categorical data were evaluated using the Chi-square test, while continuous data were evaluated using the Student’s t-test. The strength of correlation was determined using Pearson’s correlation coefficient.

Results:

Postoperative complications (P = 0.001) and lengthy stay in hospital and intensive care unit (P = 0.001) were experienced by all patients who were unable to complete the ISWT distance of 250 m. ISWT distance of 250 m corresponds to a DASI score of 10.5, which is equivalent to a calculated VO₂ max of 14.1ml/kg/min.

Conclusion:

The ISWT with a cutoff distance of 250 m is a reliable predictor of postoperative morbidity in patients undergoing colorectal oncosurgery.

The comparative and added prognostic value of biomarkers to the Revised Cardiac Risk Index for preoperative prediction of major adverse cardiac events and all-cause mortality in patients who undergo noncardiac surgery

BACKGROUND

The Revised Cardiac Risk Index (RCRI) is a widely acknowledged prognostic model to estimate preoperatively the probability of developing in-hospital major adverse cardiac events (MACE) in patients undergoing noncardiac surgery. However, the RCRI does not always make accurate predictions, so various studies have investigated whether biomarkers added to or compared with the RCRI could improve this.

OBJECTIVES

Primary: To investigate the added predictive value of biomarkers to the RCRI to preoperatively predict in-hospital MACE and other adverse outcomes in patients undergoing noncardiac surgery. Secondary: To investigate the prognostic value of biomarkers compared to the RCRI to preoperatively predict in-hospital MACE and other adverse outcomes in patients undergoing noncardiac surgery. Tertiary: To investigate the prognostic value of other prediction models compared to the RCRI to preoperatively predict in-hospital MACE and other adverse outcomes in patients undergoing noncardiac surgery.

SEARCH METHODS

We searched MEDLINE and Embase from 1 January 1999 (the year that the RCRI was published) until 25 June 2020. We also searched ISI Web of Science and SCOPUS for articles referring to the original RCRI development study in that period.

SELECTION CRITERIA

We included studies among adults who underwent noncardiac surgery, reporting on (external) validation of the RCRI and: - the addition of biomarker(s) to the RCRI; or - the comparison of the predictive accuracy of biomarker(s) to the RCRI; or - the comparison of the predictive accuracy of the RCRI to other models. Besides MACE, all other adverse outcomes were considered for inclusion.

DATA COLLECTION AND ANALYSIS

We developed a data extraction form based on the CHARMS checklist. Independent pairs of authors screened references, extracted data and assessed risk of bias and concerns regarding applicability according to PROBAST. For biomarkers and prediction models that were added or compared to the RCRI in ≥ 3 different articles, we described study characteristics and findings in further detail. We did not apply GRADE as no guidance is available for prognostic model reviews.

MAIN RESULTS

We screened 3960 records and included 107 articles.   Over all objectives we rated risk of bias as high in ≥ 1 domain in 90% of included studies, particularly in the analysis domain. Statistical pooling or meta-analysis of reported results was impossible due to heterogeneity in various aspects: outcomes used, scale by which the biomarker was added/compared to the RCRI, prediction horizons and studied populations.  Added predictive value of biomarkers to the RCRI Fifty-one studies reported on the added value of biomarkers to the RCRI. Sixty-nine different predictors were identified derived from blood (29%), imaging (33%) or other sources (38%). Addition of NT-proBNP, troponin or their combination improved the RCRI for predicting MACE (median delta c-statistics: 0.08, 0.14 and 0.12 for NT-proBNP, troponin and their combination, respectively). The median total net reclassification index (NRI) was 0.16 and 0.74 after addition of troponin and NT-proBNP to the RCRI, respectively. Calibration was not reported. To predict myocardial infarction, the median delta c-statistic when NT-proBNP was added to the RCRI was 0.09, and 0.06 for prediction of all-cause mortality and MACE combined. For BNP and copeptin, data were not sufficient to provide results on their added predictive performance, for any of the outcomes. Comparison of the predictive value of biomarkers to the RCRI  Fifty-one studies assessed the predictive performance of biomarkers alone compared to the RCRI. We identified 60 unique predictors derived from blood (38%), imaging (30%) or other sources, such as the American Society of Anesthesiologists (ASA) classification (32%). Predictions were similar between the ASA classification and the RCRI for all studied outcomes. In studies different from those identified in objective 1, the median delta c-statistic was 0.15 and 0.12 in favour of  BNP and NT-proBNP alone, respectively, when compared to the RCRI, for the prediction of MACE. For C-reactive protein, the predictive performance was similar to the RCRI. For other biomarkers and outcomes, data were insufficient to provide summary results. One study reported on calibration and none on reclassification. Comparison of the predictive value of other prognostic models to the RCRI   Fifty-two articles compared the predictive ability of the RCRI to other prognostic models. Of these, 42% developed a new prediction model, 22% updated the RCRI, or another prediction model, and 37% validated an existing prediction model. None of the other prediction models showed better performance in predicting MACE than the RCRI. To predict myocardial infarction and cardiac arrest, ACS-NSQIP-MICA had a higher median delta c-statistic of 0.11 compared to the RCRI. To predict all-cause mortality, the median delta c-statistic was 0.15 higher in favour of ACS-NSQIP-SRS compared to the RCRI. Predictive performance was not better for CHADS₂, CHA₂DS₂-VASc, R₂CHADS₂, Goldman index, Detsky index or VSG-CRI compared to the RCRI for any of the outcomes. Calibration and reclassification were reported in only one and three studies, respectively.

AUTHORS' CONCLUSIONS

Studies included in this review suggest that the predictive performance of the RCRI in predicting MACE is improved when NT-proBNP, troponin or their combination are added. Other studies indicate that BNP and NT-proBNP, when used in isolation, may even have a higher discriminative performance than the RCRI. There was insufficient evidence of a difference between the predictive accuracy of the RCRI and other prediction models in predicting MACE. However, ACS-NSQIP-MICA and ACS-NSQIP-SRS outperformed the RCRI in predicting myocardial infarction and cardiac arrest combined, and all-cause mortality, respectively. Nevertheless, the results cannot be interpreted as conclusive due to high risks of bias in a majority of papers, and pooling was impossible due to heterogeneity in outcomes, prediction horizons, biomarkers and studied populations. Future research on the added prognostic value of biomarkers to existing prediction models should focus on biomarkers with good predictive accuracy in other settings (e.g. diagnosis of myocardial infarction) and identification of biomarkers from omics data. They should be compared to novel biomarkers with so far insufficient evidence compared to established ones, including NT-proBNP or troponins. Adherence to recent guidance for prediction model studies (e.g. TRIPOD; PROBAST) and use of standardised outcome definitions in primary studies is highly recommended to facilitate systematic review and meta-analyses in the future.

Preoperative physical performance as predictor of postoperative outcomes in patients aged 65 and older scheduled for major abdominal cancer surgery: A systematic review

BACKGROUND

Abdominal cancer surgery is associated with considerable morbidity in older patients. Assessment of preoperative physical status is therefore essential. The aim of this review was to describe and compare the objective physical tests that are currently used in abdominal cancer surgery in the older patient population with regard to postoperative outcomes.

METHODS

Medline, Embase, CINAHL and Web of Science were searched until 31 December 2020. Non-interventional cohort studies were eligible if they included patients ≥65 years undergoing abdominal cancer surgery, reported results on objective preoperative physical assessment such as Cardiopulmonary Exercise Testing (CPET), field walk tests or muscle strength, and on postoperative outcomes.

RESULTS

23 publications were included (10 CPET, 13 non-CPET including Timed Up & Go, grip strength, 6-minute walking test (6MWT) and incremental shuttle walk test (ISWT)). Meta-analysis was precluded due to heterogeneity between study cohorts, different cut-off points, and inconsistent reporting of outcomes. In CPET studies, ventilatory anaerobic threshold and minute ventilation/carbon dioxide production gradient were associated with adverse outcomes. ISWT and 6MWT predicted outcomes in two studies. Tests addressing muscle strength and function were of limited value. No study compared different physical tests.

DISCUSSION

CPET has the ability to predict adverse postoperative outcomes, but it is time-consuming and requires expert assessment. ISWT or 6MWT might be a feasible alternative to estimate aerobic capacity. Muscle strength and function tests currently have limited value in risk prediction. Future research should compare the predictive value of different physical instruments with regard to postoperative outcomes in older surgical patients.

A pilot study of aquatic prehabilitation in adults with knee osteoarthritis undergoing total knee arthroplasty - short term outcome

BACKGROUND

Knee osteoarthritis (KOA) is increasingly more prevalent and significant number of patients require knee arthroplasty. Although knee arthroplasty is generally successful, it takes months to recover physical function. Preoperative physical function is known to predict postoperative outcomes and exercise can improve preoperative physical function. However, patients with KOA have difficulty exercise on land due to pain and stiffness, while water exercise can be better tolerated. We hypothesized that preoperative water exercise to improve preoperative physical function will improve postoperative outcomes after total knee arthroplasty (TKA).

METHODS

We enrolled 43 participants who were scheduled for elective TKA in 4-8 weeks and scored at or below 50th percentile in mobility assessment tool-sf (MAT-sf). All enrolled participants were assessed on 1) clinical osteoarthritis symptom severity using Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), 2) physical function using Short Physical Performance Battery (SPPB), 3) self-reported mobility using Mobility Assessment Tool-short form (MAT-sf), 4) depression using Geriatric Depression Scale-short form (GDS-sf), 5) cognitive function using Montreal Cognitive Assessment (MoCA). Blood samples for high-sensitivity-C-reactive protein (hs-CRP), tumor necrosis factor-alpha (TNF-α) and interleukin-6 (IL-6) were stored at - 80 °C then all samples were analyzed together. All the enrolled participants were randomly assigned to the aquatic exercise intervention (AEI) or usual care group. Sixty minute sessions of AEI was conducted three times a week for 4-8 weeks. Participants in both groups were evaluated within 1 week before their scheduled surgery, as well as 4 weeks after the surgery.

RESULTS

The mean age was 67.1 (±6.2), 44% were female, 74% were White. There is no statistically significant difference in combined outcome of any complication, unscheduled ER visit, and disposition to nursing home or rehab facility by AEI. However, AEI was associated with more favorable outcomes: WOMAC scores (p < 0.01), chair-stand (p = 0.019), MAT-sf as well as improved depression (p = 0.043) and cognition (p = 0.008).

CONCLUSION

4-8 weeks of aquatic exercise intervention resulted in improved functional outcomes as well as improved depression and cognition in elderly patients undergoing TKA. A larger study is warranted to explore the role of water exercise in clinical and functional outcomes of TKA.

The cardiovascular determinants of physical function in patients with end-stage kidney disease on haemodialysis

Patients with end-stage kidney disease (ESKD) are often sedentary and decreased functional capacity associates with mortality. The relationship between cardiovascular disease (CVD) and physical function has not been fully explored. Understanding the relationships between prognostically relevant measures of CVD and physical function may offer insight into how exercise interventions might target specific elements of CVD. 130 patients on haemodialysis (mean age 57 ± 15 years, 73% male, dialysis vintage 1.3 years (0.5, 3.4), recruited to the CYCLE-HD trial (ISRCTN11299707), underwent cardiovascular phenotyping with cardiac MRI (left ventricular (LV) structure and function, pulse wave velocity (PWV) and native T1 mapping) and cardiac biomarker assessment. Participants completed the incremental shuttle walk test (ISWT) and sit-to-stand 60 (STS60) as field-tests of physical function. Linear regression models identified CV determinants of physical function measures, adjusted for age, gender, BMI, diabetes, ethnicity and systolic blood pressure. Troponin I, PWV and global native T1 were univariate determinants of ISWT and STS60 performance. NT pro-BNP was a univariate determinant of ISWT performance. In multivariate models, NT pro-BNP and global native T1 were independent determinants of ISWT and STS60 performance. LV ejection fraction was an independent determinant of ISWT distance. However, age and diabetes had the strongest relationships with physical function. In conclusion, NT pro-BNP, global native T1 and LV ejection fraction were independent CV determinants of physical function. However, age and diabetes had the greatest independent influence. Targeting diabetic care may ameliorate deconditioning in these patients and a multimorbidity approach should be considered when developing exercise interventions.

Association of a Preoperative Leisure-Time Physical Activity With Short- and Long-term Outcomes of Patients Undergoing Curative Resection for Stage I to III Colorectal Cancer: A Propensity Score Matching Analysis

BACKGROUND

Physical activity might be directly or indirectly linked to the risk of colorectal cancer and the prognosis of patients with colorectal cancer.

OBJECTIVE

This study aimed to elucidate whether preoperative physical activity plays a role in reducing short-term postoperative complications and improving long-term survival of patients with colorectal cancer.

DESIGN

This was a retrospective analysis of prospectively collected data.

SETTINGS

This study was conducted at a department of colorectal surgery in a tertiary teaching hospital between January 1995 and December 2016.

PATIENTS

Patients who underwent curative resection for stage I to III primary colorectal cancer were enrolled. According to the preoperative leisure-time weekly metabolic equivalent of task values, patients were divided into 2 groups: the metabolic equivalent of task <12 group and the metabolic equivalent of task ≥12 group. A 1:1 propensity score matching was used to reduce imbalance and selection biases based on 6 covariates, namely, age, sex, BMI, tumor location, tumor stage, and adjuvant chemotherapy administration.

MAIN OUTCOME MEASURES

χ tests were used to analyze short-term postoperative complications. Kaplan-Meier analyses were used to evaluate disease-free survival and overall survival.

RESULTS

In the matched cohort patients, significant differences in overall postoperative complications and mortality were observed in favor of the metabolic equivalent of task ≥12 group, although there was no difference in any single item of postoperative morbidity. The results of the Kaplan-Meier analysis and log-rank test demonstrated a significant survival benefit in the metabolic equivalent of task ≥12 group compared with the metabolic equivalent of task <12 group both for disease-free and overall survival.

LIMITATIONS

This study is limited by its retrospective nature.

CONCLUSIONS

This single-institute study provides evidence of the association of preoperative leisure-time physical activity with short-term postoperative morbidity and mortality, as well as long-term survival. See Video Abstract at http://links.lww.com/DCR/B189. ASOCIACIÓN DE ACTIVIDAD FÍSICA DE TIEMPO LIBRE PREOPERATORIA CON RESULTADOS A CORTO Y LARGO PLAZO DE PACIENTES SOMETIDOS A RESECCIÓN CURATIVA POR CÁNCER COLORRECTAL EN ESTADIO I-III: UN ANÁLISIS DE COINCIDENCIA DE PUNTAJE DE PROPENSIÓN ANTECEDENTES: LA ACTIVIDAD FíSICA PUEDE ESTAR DIRECTA O INDIRECTAMENTE RELACIONADA CON EL RIESGO DE CÁNCER COLORRECTAL Y EL PRONÓSTICO DE LOS PACIENTES CON CÁNCER COLORRECTAL.: Este estudio tuvo como objetivo dilucidar si la actividad física preoperatoria desempeña un papel en la reducción de las complicaciones postoperatorias a corto plazo y en mejorar la supervivencia a largo plazo de los pacientes con cáncer colorrectal.Este fue un análisis retrospectivo de datos recolectados prospectivamente.Este estudio se realizó en un departamento de cirugía colorrectal en un hospital universitario terciario entre Enero de 1995 y Diciembre de 2016.Se incluyeron pacientes sometidos a resección curativa por cáncer colorrectal primario en estadio I-III. De acuerdo con el equivalente metabólico semanal en el tiempo libre de los valores de la tarea preoperatorio, los pacientes se dividieron en dos grupos: el equivalente metabólico del grupo de tarea <12 y el equivalente metabólico del grupo de tarea ≥ 12. Se utilizó una coincidencia de puntaje de propensión 1: 1 para reducir los desequilibrios y los sesgos de selección basados en seis covariables, principalmente, edad, sexo, índice de masa corporal, ubicación del tumor, estadio del tumor y administración de quimioterapia adyuvante.Las pruebas de Chi-cuadrado se utilizaron para analizar las complicaciones postoperatorias a corto plazo. Los análisis de Kaplan-Meier se utilizaron para evaluar la supervivencia libre de enfermedad y la supervivencia general.en los pacientes de la cohorte emparejada, se observaron diferencias significativas en las complicaciones postoperatorias generales y la mortalidad a favor del equivalente metabólico del grupo de tareas ≥ 12, aunque no hubo diferencias en ningún elemento único de morbilidad postoperatoria. Los resultados del análisis de Kaplan-Meier y la prueba de log-rank demostraron un beneficio de supervivencia significativo en el equivalente metabólico del grupo tarea ≥ 12 en comparación con el equivalente metabólico del grupo tarea <12 tanto para la supervivencia libre de enfermedad como para la supervivencia general.Este estudio está limitado por su naturaleza retrospectiva.Este estudio de instituto único proporciona evidencia de la asociación de la actividad física preoperatoria en el tiempo libre con la morbilidad y mortalidad postoperatorias a corto plazo, así como la supervivencia a largo plazo. Consulte Video Resumen en http://links.lww.com/DCR/B189. (Traducción-Dr. Yesenia Rojas-Kahlil).

Physical Activity and Outcomes in Colorectal Surgery: A Pilot Prospective Cohort Study

<b><i>Background:</i></b> Mobilization after surgery is recommended to reduce the risk of adverse effects and to improve recovery. The aim of this study was to examine the associations between perioperative physical activity and postoperative outcomes in colorectal surgery. <b><i>Methods:</i></b> The daily number of footsteps was recorded from preoperative day 5 to postoperative day 3 in a prospective cohort of patients using wrist accelerometers. Timed Up and Go Test (TUGT), 6 Min Walking Test (6MWT), and peak expiratory flow (PEF) were assessed preoperatively. ROC curves were used to assess the performance of physical activity as a diagnostic test of complications and prolonged length of stay (LOS) of more than 5 days. <b><i>Results:</i></b> A total of 50 patients were included. Patients with complications were significantly older (67 years) than those without complications (53 years, <i>p</i> = 0.020). PEF was significantly lower in the group with complications (mean flow 294.3 vs. 363.6 L/min, <i>p</i> = 0.038) while there was no difference between groups for the other two tests (TUGT and 6MWT). The tests had no capacity to discriminate the occurrence of complications and prolonged LOS, except the 6MWT for LOS (AUC = 0.746, <i>p</i> = 0.004, 95% CI: 0.604–0.889). There was no difference in the mean number of preoperative footsteps, but patients with complications walked significantly less postoperatively (mean daily footsteps 1,101 vs. 1,243, <i>p</i> = 0.018). <b><i>Conclusions:</i></b><i></i>Colorectal surgery patients with complications were elderly, had decreased PEF, and walked less postoperatively. The 6MWT could be used preoperatively to discriminate patients with potentially increased LOS and foster mobilisation strategies.

Variation in Preoperative and Postoperative Physical Therapist Management of Patients Opting for Elective Abdominal Surgery

BACKGROUND

Evidence about the role of physical therapy in perioperative care pathways to improve postoperative outcomes is growing. However, it is unclear whether research findings have been translated into daily practice.

OBJECTIVE

The objectives of this study were to describe the current content and between-hospital variability of perioperative physical therapist management for patients undergoing colorectal, hepatic, or pancreatic resection in the Netherlands and to compare currently recommended state-of-the-art physical therapy with self-reported daily clinical physical therapist management.

DESIGN

This was a cross-sectional survey study.

METHODS

Hospital physical therapists were asked to complete an online survey about pre- and postoperative physical therapy at their hospital. To explore the variability of perioperative physical therapist management between hospitals, frequency variables were clustered to determine the level of uniformity. Latent class analysis was performed to identify clusters of hospitals with certain homogeneous characteristics on a 19-item dichotomous scale.

RESULTS

Of 82 eligible Dutch hospitals, 65 filled out the survey (79.3%). Preoperative physical therapy was performed in 34 hospitals (54.0%; 2/65 responding hospitals were excluded from the data analysis). Postoperative physical therapy was performed in all responding hospitals, focusing mainly on regaining independent physical functioning. Latent class analysis identified a 3-class model. Hospitals in classes I and II were more likely to provide preoperative physical therapist interventions than hospitals in class III.

LIMITATIONS

The use of self-reported answers can lead to bias.

CONCLUSIONS

There was a wide degree of variability between hospitals regarding pre- and postoperative clinical physical therapist practice for patients opting for major abdominal surgery. Three different classes of daily practice were identified. Further translation of key research findings into clinical physical therapist practice is advised, especially for hospitals in which the physical therapist is not involved preoperatively. Moreover, improving uniformity by developing up-to-date clinical guidelines is recommended.

Systematic Review and Meta-analysis of Objective Assessment of Physical Fitness in Patients Undergoing Colorectal Cancer Surgery

BACKGROUND

Gas exchange-derived variables obtained from cardiopulmonary exercise testing allow objective assessment of functional capacity and hence physiological reserve to withstand the stressors of major surgery. Field walk tests provide an alternate means for objective assessment of functional capacity that may be cheaper and have greater acceptability, in particular, in elderly patients.

OBJECTIVE

This systematic review evaluated the predictive value of cardiopulmonary exercise testing and field walk tests in surgical outcomes after colorectal surgery.

DATA SOURCE

A systematic search was undertaken using Medline, PubMed, Embase, CINAHL, and PEDro.

STUDY SELECTION

Adult patients who had cardiopulmonary exercise testing and/or field walk test before colorectal surgery were included.

MAIN OUTCOME MEASURE

The primary outcomes measured were hospital length of stay and postoperative morbidity and mortality.

RESULTS

A total of 7 studies with a cohort of 1418 patients who underwent colorectal surgery were identified for inclusion in a qualitative analysis. Both pooled oxygen consumption at anaerobic threshold (range, 10.1-11.1 mL·kg·min) and peak oxygen consumption (range, 16.7-18.6 mL·kg·min) were predictive of complications (OR for anaerobic threshold, 0.76; 95% CI, 0.66-0.85, p<0.0001; OR for peak oxygen consumption, 0.76; 95% CI, 0.67-0.85, p<0.0001). Patients had significant increased risk of developing postoperative complications if their anaerobic threshold was below this cut point (p<0.001). However, it was not predictive of anastomotic leak (p = 0.644). Shorter distance (<250 m) walked in incremental shuttle walk test, lower anaerobic threshold, and lower peak oxygen consumption were associated with prolonged hospital length of stay, which was closely related to the development of complications.

CONCLUSIONS

Variables derived from cardiopulmonary exercise testing are predictive of postoperative complications and hospital length of stay. Currently, there are insufficient data to support the predictive role of the field walk test in colorectal surgery.

Multimodal Prehabilitation Programs as a Bundle of Care in Gastrointestinal Cancer Surgery: A Systematic Review

BACKGROUND

Prehabilitation reflects a proactive process of preoperative optimization undertaken between cancer diagnosis and definitive surgical treatment, with the intent of improving physiological capacity to withstand the major insult of surgery. Prehabilitation before GI cancer surgery is currently not widely adopted, and most research has focused on unimodal interventions such as exercise therapy, nutritional supplementation, and hematinic optimization. A review of the existing literature was undertaken to investigate the impact of multimodal prehabilitation programs as a "bundle of care."

DATA SOURCE

A systematic literature search was performed utilizing Medline, PubMed, Embase, Cinahl, Cochrane, and Google Scholar databases.

STUDY SELECTION

The quality of studies was assessed by using the Cochrane tool for assessing risk of bias (randomized trials) and the Newcastle-Ottawa Quality Assessment scale (cohort studies).

INTERVENTION

Studies were chosen that involved pre-operative optimization of patients before GI cancer surgery.

MAIN OUTCOMES

The primary outcome measured was the impact of prehabilitation programs on preoperative fitness and postoperative outcomes.

RESULTS

Of the 544 studies identified, 20 were included in the qualitative analysis. Two trials investigated the impact of multimodal prehabilitation (exercise, nutritional supplementation, anxiety management). Trials exploring prehabilitation with unimodal interventions included impact of exercise therapy (7 trials), impact of preoperative iron replacement (5 trials), nutritional optimization (5 trials), and impact of preoperative smoking cessation (2 trials). Compliance within the identified studies was variable (range: 16%-100%).

LIMITATIONS

There is a lack of adequately powered trials that utilize objective risk stratification and uniform end points. As such, a meta-analysis was not performed because of the heterogeneity in study design.

CONCLUSION

Although small studies are supportive of multimodal interventions, there are insufficient data to make a conclusion about the integration of prehabilitation in GI cancer surgery as a bundle of care. Larger, prospective trials, utilizing uniform objective risk stratification and structured interventions, with predefined clinical and health economic end points, are required before definitive value can be assigned to prehabilitation programs.

The association between performance parameters of physical fitness and postoperative outcomes in patients undergoing colorectal surgery: An evaluation of care data

BACKGROUND

Preoperative cardiorespiratory fitness, as measured by cardiopulmonary testing or estimated using the less sophisticated incremental shuttle walk test, timed up-and-go test or stair climb test is known to be associated with postoperative outcome. This study aimed to evaluate whether parameters of physical fitness are associated with postoperative outcome in patients with colorectal cancer scheduled for elective resection.

PATIENTS AND METHODS

Perioperative data of patients who underwent colorectal resection at Maastricht University Medical Center were retrospectively analyzed. Preoperative variables (e.g., age, body mass index, comorbidities, physical fitness, tumour characteristics, neoadjuvant treatment, American Society of Anesthesiologists score, level of perceived fatigue and nutritional status) were compared with postoperative outcomes.

RESULTS

Out of 80 consecutive cases, 75 (93.8%) were available for analysis (57.3% male, median ± interquartile range age 69.2 ± 11.7 years). A higher Charlson comorbidity index (odds ratio (OR) of 1.604, 95% confidence interval (CI) 1.120-2.296), worse functional exercise capacity (in meters, OR of 0.995, 95% CI 0.991-1.000), a lower physical activity level (in min/day, OR of 0.994, 95% CI 0.988-1.000), and a higher level of perceived fatigue (OR of 1.047, 95% CI 1.016-1.078), were associated with a slower time to recovery of physical functioning. A better functional exercise capacity was associated with a lower OR (OR of 0.995, 95% CI 0.991-1.000) for non-surgical complications.

CONCLUSION

There is an association between preoperative parameters and postoperative outcomes in patients with colorectal cancer scheduled for resection. Patients benefit from an optimal preoperative physical fitness level. Specific interventions can target this physical fitness level.

Systematic review and meta-analysis of risk factors for postoperative delirium among older patients undergoing gastrointestinal surgery

BACKGROUND

Postoperative delirium (POD) is common after surgery. As age is a known risk factor, the increased ageing of the population undergoing surgery emphasizes the importance of the subject. Knowledge of other potential risk factors in older patients with surgical gastrointestinal diseases is lacking. The aim here was to collate and synthesize the published literature on risk factors for delirium in this group.

METHODS

Five databases were searched (MEDLINE, Web of Science, Embase, CINAHL(®) and PSYCinfo(®) ) between January 1987 and November 2014. The Newcastle-Ottawa Scale was used to rate study quality. Pooled odds ratios or mean differences for individual risk factors were estimated using the Mantel-Haenszel and inverse-variance methods.

RESULTS

Eleven studies met the inclusion criteria; they provided a total of 1427 patients (318 with delirium and 1109 without), and predominantly included patients undergoing elective colorectal surgery. The incidence of POD ranged from 8·2 to 54·4 per cent. A total of 95 risk factors were investigated, illustrating wide heterogeneity in study design. Seven statistically significant risk factors were identified in pooled analysis: old age, American Society of Anesthesiologists (ASA) physical status grade at least III, body mass index, lower serum level of albumin, intraoperative hypotension, perioperative blood transfusion and history of alcohol excess. Patients with POD had a significantly increased duration of hospital stay and a higher mortality rate compared with those without delirium.

CONCLUSION

Delirium is common in older patients undergoing gastrointestinal surgery. Several risk factors were consistently associated with POD.

Patient frailty: the elephant in the operating room

For most surgeons and many anaesthetists, patient frailty is currently the 'elephant in the (operating) room': it is easy to spot, but is often ignored. In this paper, we discuss different approaches to the measurement of frailty and review the evidence regarding the effect of frailty on peri-operative outcomes. We explore the limitations of 'eyeballing' patients to quantify frailty, and consider why the frail older patient, challenged by seemingly minor insults in the postoperative period, may suffer falls or delirium. Frailty represents a state of increased vulnerability to stressors, and older inpatients are exposed to multiple stressors in the peri-operative setting. Quantifying frailty is likely to increase the precision of peri-operative risk assessment. The Frailty Index derived from Comprehensive Geriatric Assessment is a simple and robust way to quantify frailty, but is yet to be systematically investigated in the pre-operative setting. Furthermore, the optimal care for frail patients and the reversibility of frailty with prehabilitation are fertile areas for future research.