| 1. |
- Afshari, Kevin, et al.
(författare)
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Loop-ileostomy reversal in a 23-h stay setting is safe with high patient satisfaction
- 2021
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Ingår i: Scandinavian Journal of Gastroenterology. - : Taylor & Francis Group. - 0036-5521 .- 1502-7708. ; 56:9, s. 1126-1130
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Tidskriftsartikel (refereegranskat)abstract
- Introduction: This study aimed to determine whether day-case closure of loop ileostomy with discharge within 23 h was both feasible and accepted by patients.Materials and methods: We conducted a prospective pilot study where selected rectal cancer patients with diverting loop ileostomy underwent stoma closure in a 23-h stay setting. Patients were followed up on the third, seventh, and 30th postoperative day and phoned daily during the first week. A comparable group of 30 patients who underwent standard in-hospital stoma closure prior to the start of the study were selected retrospectively as historical controls.Results: In total, 30 patients (median age, 67 years; range, 41-79 years) were included. All patients met discharge criteria and were discharged within 23 h of surgery, except one. In total, seven patients (23%) were admitted. Two of these patients underwent laparotomy because of anastomotic leakage and small bowel obstruction, respectively. The mean total length of stay was 1.7 days. Most patients (87%) were satisfied with the treatment without feeling neglected or anxious and preferred the 23-h stay setting. In the control group, the mean length of stay was 5 days. Seven patients (23%) were readmitted. Two of these patients underwent laparotomy because of small bowel obstruction and abscess, respectively.Conclusion: Ileostomy closure in a 23-h stay setting in selected patients with meticulous follow up is feasible and safe with high patient satisfaction.
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| 2. |
- Afshari, Kevin, et al.
(författare)
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Risk factors for developing Anorectal dysfunction after Anterior Resection
- 2021
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Ingår i: International Journal of Colorectal Disease. - : Springer Nature. - 0179-1958 .- 1432-1262. ; 36:12, s. 2697-2705
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Tidskriftsartikel (refereegranskat)abstract
- Anterior resection (AR) may result in defecatory dysfunction and the cause is multifactorial. The aim was to explore if dysfunction could be related to the part of the colon used for anastomosis (sigmoid or descending) and to identify other possible risk factors for bowel dysfunction after AR.This is a retrospective study based on prospectively registered data from a regional registry at the surgical department in Västmanland 1996–2019. Bowel function was registered at 1 year after AR or after stoma reversal. In total, 470 stage I–III rectal cancer patients had AR whereof 412 were included in this study.Clustering was seen in 57%, incontinence 29%, urgency 22%, and evacuatory dysfunction 16%. The part of the colon used for anastomosis, level of vascular tie, and gender were not significantly associated with defecatory dysfunction. The higher the anastomotic level, the lower the risk of incontinence (OR 0.75; CI 0.63–0.90; p < 0.001) and clustering (OR 0.78; CI 0.67–0.90; p < 0.001). Compared with patients without a loop-ileostomy, an increased risk of clustering (OR 1.89; 1.08–3.31; p = 0.03), incontinence (OR 2.48; 1.29–4.77; p < 0.01), and urgency (OR 4.61; CI 2.02–10.60; p < 0.001) was seen after loop-ileostomy closure. Preoperative radiotherapy had a negative impact on continence and clustering seen mainly in the unadjusted analysis.The part of the colon used for anastomosis was not a significantly associated functional outcome after anterior resection. Low anastomotic level and having had a diverting ileostomy were independent risk factors associated with negative functional outcomes.
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| 3. |
- Afshari, Kevin, et al.
(författare)
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Risk factors for small bowel obstruction after open rectal cancer resection
- 2021
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Ingår i: BMC Surgery. - : BioMed Central (BMC). - 1471-2482. ; 21:1
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Tidskriftsartikel (refereegranskat)abstract
- Background: Small bowel obstruction (SBO) is observed in around 10% of patients with prior open abdominal surgery. Rectal resection causes the highest readmission rates. The aim of this study was to investigate risk factors for readmission for SBO and causes for SBO in patients who needed surgery following rectal cancer surgery.Methods: A population-based registry with prospectively gathered data on 752 consecutive patients with rectal cancer who underwent open pelvic surgery between January 1996 and January 2017 was used. Univariable and multivariable regression analysis was performed, and the risk of SBO was assessed.Results: In total, 84 patients (11%) developed SBO after a median follow-up time of 48 months. Of these patients, 57% developed SBO during the 1st year after rectal cancer surgery. Surgery for SBO was performed in 32 patients (4.3%), and the cause of SBO was stoma-related in one-fourth of these patients. In the univariable analysis previous RT and re-laparotomy were found as risk factors for readmission for SBO. Re-laparotomy was an independent risk factor for readmission for SBO (OR 2.824, CI 1.129-7.065, P = 0.026) in the multivariable analysis, but not for surgery for SBO. Rectal resection without anastomoses, splenic flexors mobilization, intraoperative bleeding, operative time were not found as risk factors for SBO.Conclusions: One-tenth of rectal cancer patients who had open surgery developed SBO, most commonly within the 1st postoperative year. The risk of SBO is greatest in patients with complications after rectal cancer resection that result in a re-laparotomy.
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| 4. |
- Afshari, Kevin
(författare)
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Surgical Aspects and Prognostic Factors in the Management of Rectal Cancer
- 2021
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Survival among patients with stage IV rectal cancer is poor and surgical treatment for this disease is associated with morbidities such as small bowel obstruction, complications with a diverting loop ileostomy, and functional bowel disturbances. The overall aim of this thesis was to assess risk factors and morbidity after surgery for rectal cancer and to evaluate factors affecting survival in patients with stage IV rectal cancer.Paper I a prospective study on patients with rectal cancer with loop ileostomy who underwent stoma closure in a 23-hour hospital stay setting. Results were compared with a group who underwent standard in-hospital stoma closure prior to the start of the study, selected retrospectively as controls. No differences were found in the number of complications or the frequency of re-hospitalization or re-operation, indicating that ileostomy closure in a 23-hour hospital stay setting in these selected patients was feasible and safe with high patient satisfaction.Paper II a population-based study with data gathered prospectively. In total, 11% of the patients developed small bowel obstruction (SBO), mostly during the first year after rectal cancer surgery. Surgical treatment for SBO was performed in 4.2% of the patients, and the mechanism was stoma-related in one-fourth. Rectal resection without anastomoses, age, morbidity, and previous radiotherapy (RT) was not associated with admission to the hospital or surgery for SBO. Re-laparotomy due to complications after rectal cancer surgery was an independent risk factor for admission for treating SBO.Paper III a population-based study with data gathered prospectively on bowel function at 1 year after anterior resection or stoma reversal. No associations were found between any defecatory dysfunction and the part of the colon used for anastomosis, the level of the vascular tie, or gender. An association was observed between higher anastomotic level and a lower risk of incontinence and clustering. At 1 year after loop ileostomy closure, the risks of incontinence, clustering, and urgency increased by up to fourfold.Paper IV a case-control study aiming to identify patient-, tumor-, and treatment-related prognostic factors for 5-year survival in patients with rectal cancer with synchronous stage IV disease. Patient-related factors did not differ between groups. Among the tumor-related factors, multiple site metastases, bilobar liver metastases, and increasing numbers of liver metastases were associated with poor survival. Prognostic treatment-related factors were preoperative RT, metastasectomy, and radical resection of the primary tumor. The most important prognostic factor for long-term survival was metastasectomy.
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| 5. |
- Chabok, Abbas, 1964-, et al.
(författare)
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Changing Paradigms in the Management of Acute Uncomplicated Diverticulitis
- 2021
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Ingår i: Scandinavian Journal of Surgery. - : Sage Publications. - 1457-4969 .- 1799-7267. ; 110:2, s. 180-186
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Forskningsöversikt (refereegranskat)abstract
- Left-sided colonic diverticulitis is a common condition with significant morbidity and health care costs in Western countries. Acute uncomplicated diverticulitis which is characterized by the absence of organ dysfunction, abscesses, fistula, or perforations accounts for around 80% of the cases. In the last decades, several traditional paradigms in the management of acute uncomplicated diverticulitis have been replaced by evidence-based routines. This review provides a comprehensive evidence-based and clinical-oriented overview of up-to-date diagnostics with computer tomography, non-antibiotic treatment, outpatient treatment, and surgical strategies as well as follow-up of patients with acute uncomplicated diverticulitis.
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| 6. |
- Lönnberg, Lena, et al.
(författare)
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Early screening for metabolic syndrome opens a window of opportunity : learnings from a long-term, population-based study
- 2023
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Ingår i: European Heart Journal. - 0195-668X .- 1522-9645. ; 44:Supplement_2
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Introduction: The metabolic syndrome (MetS) represents a cluster of risk factors that predict cardiovascular disease (CVD) and type 2 diabetes. Early detection of MetS opens up for a successful treatment of the cardiovascular (CV) risk factors involved, hopefully leading to later advent of CVD in the general population.Purpose: In this long-term, population-based study we aimed to investigate how presence of MetS, in middle-aged men and women, was associated with all-cause mortality and non-fatal CVD later in life.Methods: Between 1990 -1999 a screening program was conducted among 40- and 50-year-old inhabitants in the County of Västmanland, Sweden. Data on lifestyle habits and socio-economic status were collected. Total cholesterol, fasting blood glucose, blood pressure, weight, height, waist and hip circumference were measured. Individuals that met three or more of the following risk factors were classified with MetS: waist circumference: ≥102 cm (men) and ≥88 cm (women), total cholesterol: ≥6.1 mmol/ l, blood pressure: ≥130 and/ or ≥85 mm Hg (or previous diagnosis of hypertension) or fasting plasma glucose: ≥5.6 mmol/ l (or previous diagnosis of type 2 diabetes). A control group was identified with individuals from the same population, without MetS diagnosis. Each participant with MetS was matched to two controls regarding sex, age and date for the health examination. The association between midlife MetS and all-cause mortality and non-fatal CV events (stroke and myocardial infarction) was adjusted for age, sex, smoking, physical inactivity, educational level, BMI, hip circumference and living alone or with family members. Multivariable cox regression and Kaplan-Meier analyses were used.Results: A total number of 5084 individuals met the criteria for MetS and a control group of 10 168 individuals was identified. The median (Q1, Q3) follow-up time was 27 years (24.6, 30.1), corresponding to 130 820 and 269 696 person-years at risk in the MetS and the control group respectively. During follow up, 1317 MetS and 1904 control subjects died, implying 10 deaths in the MetS group and 7 deaths in the controls per 1000 person-years at risk (fig. 1). Cox analysis showed increased mortality in the MetS group compared to the controls, hazard ratio (HR) 1.30 (95% CI: 1.20-1.40); p<0.001. Non-fatal CV events in the MetS group and in the controls were 32.4% vs 22.8%, respectively (p<0.001); HR 1.35 (CI;1.25–1.46) (fig 2). Median time (Q1, Q3) for first non-fatal CV event was 16.8 years (9.9,22.3) in the MetS group and 19.1 (12.2, 23.6) for the controls.Conclusions: Results from this long-term, population-based study underline that the risk of non-fatal CVD and all-cause mortality was significantly higher in individuals with asymptomatic MetS. Present results support previous studies that early identification of MetS with screening programs might open a window of opportunity for prevention of CVD and premature death in the general population.
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| 7. |
- Moberg, Lena, et al.
(författare)
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Blood pressure screening in midlife aids in prediction of dementia later in life
- 2022
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Ingår i: Upsala Journal of Medical Sciences. - : UPSALA MED SOC. - 0300-9734 .- 2000-1967. ; 127:1
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Tidskriftsartikel (refereegranskat)abstract
- Background: There is substantial evidence that midlife hypertension is a risk factor for late life dementia. Our aim was to investigate if even high blood pressure at a single timepoint in midlife can predict an increased risk for all-cause dementia, Alzheimer's disease (AD), or vascular dementia (VaD) later in life. Methods: The community-based study population comprised 30,102 dementia-free individuals from the Westmannia Cardiovascular Risk Factors Study. The participants were aged 40 or 50 years when the health examination took place in 1990-2000. Diagnose registers from both hospitals and primary healthcare centers were used to identify individuals who after inclusion to the study developed dementia.The association between midlife high blood pressure (defined as systolic blood pressure >140 and/or diastolic blood pressure >90 mmHg) at a single timepoint and dementia was adjusted for age, gender, body mass index (BMI), fasting blood glucose, education, smoking, and physical activity level. Multivariate binary cox regression analyses were used. Results: After a mean follow-up time of 24 years resulting in 662,244 person/years, 761 (2.5%) individuals had been diagnosed with dementia. Midlife high blood pressure at a single timepoint predicted allcause dementia (hazard ratio [HR]: 1.22, 95% confidence interval [CI]: 1.02-1.45) and VaD (HR: 2.10, 95% CI: 1.47-3.00) but not AD (HR: 1.06, 95% CI: 0.81-1.38). Conclusion: This study suggests that even midlife high blood pressure at a single timepoint predicts allcause dementia and more than doubles the risk for VaD later in life independently of established confounders. Even though there was no such association with AD, this strengthens the importance of midlife health examinations in order to identify individuals with hypertension and initiate treatment.
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| 8. |
- Schultz, J. K., et al.
(författare)
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European Society of Coloproctology: guidelines for the management of diverticular disease of the colon
- 2020
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Ingår i: Colorectal Disease. - : Wiley. - 1462-8910 .- 1463-1318. ; 22:52, s. 5-28
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Tidskriftsartikel (refereegranskat)abstract
- Aim The goal of this European Society of Coloproctology (ESCP) guideline project is to give an overview of the existing evidence on the management of diverticular disease, primarily as a guidance to surgeons. Methods The guideline was developed during several working phases including three voting rounds and one consensus meeting. The two project leads (JKS and EA) appointed by the ESCP guideline committee together with one member of the guideline committee (WB) agreed on the methodology, decided on six themes for working groups (WGs) and drafted a list of research questions. Senior WG members, mostly colorectal surgeons within the ESCP, were invited based on publication records and geographical aspects. Other specialties were included in the WGs where relevant. In addition, one trainee or PhD fellow was invited in each WG. All six WGs revised the research questions if necessary, did a literature search, created evidence tables where feasible, and drafted supporting text to each research question and statement. The text and statement proposals from each WG were arranged as one document by the first and last authors before online voting by all authors in two rounds. For the second voting ESCP national representatives were also invited. More than 90% agreement was considered a consensus. The final phrasing of the statements with < 90% agreement was discussed in a consensus meeting at the ESCP annual meeting in Vienna in September 2019. Thereafter, the first and the last author drafted the final text of the guideline and circulated it for final approval and for a third and final online voting of rephrased statements. Results This guideline contains 38 evidence based consensus statements on the management of diverticular disease. Conclusion This international, multidisciplinary guideline provides an up to date summary of the current knowledge of the management of diverticular disease as a guidance for clinicians and patients.
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| 9. |
- Sigurdardottir, Johanna, et al.
(författare)
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Elective surgery should be considered after successful conservative treatment of recurrent diverticular abscesses
- 2020
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Ingår i: Scandinavian Journal of Gastroenterology. - : TAYLOR & FRANCIS LTD. - 0036-5521 .- 1502-7708. ; 55:4, s. 454-459
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Tidskriftsartikel (refereegranskat)abstract
- Purpose: The purpose of this study was to evaluate the disease pattern and treatment of diverticular abscesses. Methods: Patients treated for diverticulitis (K57) in Vastmanland, Sweden were identified for this retrospective population-based study between January 2010 and December 2014. Patients with diverticular abscesses were included. The clinical and radiological data were extracted, and the computed tomography scans were reevaluated. Results: Of the 75 patients (45 women) with a median age of 62 years (range: 23-88 years), abscesses were localized pericolic in 42 patients (59%) and in the pelvis in 33 patients (41%). The median abscess size was 4.8 cm (range: 1.1-11.0 cm). Six patients (8%) required urgent surgical intervention during the index admission. The median follow-up time was 58 months (range: 0-95 months). During follow-up, 40 patients (58%) had disease recurrence and 35 of these patients (88%) presented with complicated diverticulitis. The median time until re-admission was 2 months (range: 3 days-94 months). Patients with pelvic abscesses developed fistulas more frequently, 3 versus 11 patients (p = .003). Twenty-three percent of patients with pericolic abscesses required surgery compared with 40% of patients with pelvic abscesses (p = .09). No patients had a recurrence of abscesses after a colonic resection. Conclusion: The majority of patients with diverticular abscesses had recurrences with repeated admissions regardless of abscess location. An unexpectedly high proportion of patients required surgical intervention during the follow-up period. A liberal approach regarding elective surgery for patients with recurrent diverticulitis abscesses who tolerate surgery seems justified.
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| 10. |
- Sigurdardottir, Johanna, et al.
(författare)
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Increased accuracy in diagnosing diverticulitis using predictive clinical factors
- 2022
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Ingår i: Upsala Journal of Medical Sciences. - : Uppsala Medical Society. - 0300-9734 .- 2000-1967. ; 127:1
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Tidskriftsartikel (refereegranskat)abstract
- Background: The aim of this study was to identify clinical factors leading to increased diagnostic accuracy for acute colonic diverticulitis. Methods: Patients with clinical suspicion of acute colonic diverticulitis verified with computed tomography (CT) from two hospitals in Sweden between 9 January 2017 and 31 October 2017 were prospectively included. Symptoms, comorbidities, and laboratory results were documented. Candidate variables were analyzed using logistic regression, and the final variable set that yielded the most accurate predictions was identified using least absolute shrinkage and selection operator regression and evaluated using the area under the receiver operating characteristic (ROC) curve. Results: In total, 146 patients were included (73% women; median age 68 years; age range, 50-94 years). The clinical diagnostic accuracy was 70.5%. In the multiple logistic regression analysis, gender (female vs male odds ratio [OR]: 4.82; confidence interval [CI], 1.56-14.91), age (OR, 0.92; 95% CI, 0.87-0.98), pain on the lower left side of the abdomen (OR, 15.14; 95% CI, 2.65-86.58), and absence of vomiting (OR, 14.02; 95% CI, 2.90-67.88) were statistically significant and associated with the diagnosis of CT-verified diverticulitis. With seven predictors (age, gender, urinary symptoms, nausea, temperature, C-reactive protein, and pain left lower side), the area under the ROC curve was 0.82, and a formula was developed for calculating a risk score. Conclusion: We present a scoring system using common clinical variables that can be applied to patients with clinical suspicion of colonic diverticulitis to increase the diagnostic accuracy. The developed scoring system is available for free of charge at https://phille-wagner.shinyapps.io/Diverticulitis_risk_model/.
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| 11. |
- Thorisson, Arnar, et al.
(författare)
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Diagnostic Accuracy of Acute Diverticulitis with Non-Enhanced Low-Dose CT
- 2020
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Ingår i: BJS Open. - : John Wiley & Sons. - 2474-9842. ; 4:4, s. 659-665
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Tidskriftsartikel (refereegranskat)abstract
- Purpose: To evaluate the diagnostic accuracy of non-enhanced low-dose computed tomography (LDCT) in acute colonic diverticulitis with contrast-enhanced standard-dose CT (SDCT) as the reference method.Materials and Methods: Consecutive patients with clinically suspected diverticulitis were included from two hospitals between January and October 2017. All patients underwent LDCT followed by SDCT. All CT examinations were assessed for signs of diverticulitis, complications, and other diagnoses by three independent radiologists (two radiology consultants and one fourth-year resident) using SDCT as the reference method. Sensitivity, specificity, and agreement were calculated.Results: In total, 149 patients (median age 68, 107 women) were included; 107 had diverticulitis on standard CT. Sensitivity for diverticulitis using LDCT was 100%; the values were 99% for consulting radiologists and 92% for the radiology resident. Specificity was 100% for both consultants and 84% for the resident. Sensitivity for identification of complications was 74%, 60%, and 54%, respectively. Twenty-six patients had other causes of abdominal symptoms on standard CT, 23 (88%) of whom were diagnosed correctly on LDCT. One case of splenic infarction and two cases of segment colitis were missed on LDCT.Conclusion: The diagnostic accuracy of LDCT was high for acute diverticulitis. Therefore, it is recommended as a standard method that should help to reduce radiation dose and cost. LDCT had lower sensitivity for complications, although discrimination between an inflamed diverticulum and small pericolic abscess accounted for a proportion of the discrepancies.
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| 12. |
- Torkzad, Michael R., et al.
(författare)
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Impact of COVID-19 on the incidence of CT-diagnosed appendicitis and its complications in the UK and Sweden
- 2022
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Ingår i: International Journal of Colorectal Disease. - : Springer Nature. - 0179-1958 .- 1432-1262. ; 37:6, s. 1375-1383
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Tidskriftsartikel (refereegranskat)abstract
- Aim To compare the number of appendicitis cases and its complications, during the first months of the COVID-19 pandemic in Sweden and the UK and the corresponding time period in 2019. Method Reports of emergency abdominopelvic CT performed at 56 Swedish hospitals and 38 British hospitals between April and July 2020 and a corresponding control cohort from 2019 were reviewed. Two radiologists and two surgeons blinded to the date of cohorts analyzed all reports for diagnosis of appendicitis, perforation, and abscess. A random selection of cases was chosen for the measurement of inter-rater agreement. Result Both in Sweden (6111) and the UK (5591) fewer, abdominopelvic CT scans were done in 2020 compared to 2019 (6433 and 7223, respectively); p < 0.001. In the UK, the number of appendicitis was 36% lower in April-June 2020 compared to 2019 but not in Sweden. Among the appendicitis cases, there was a higher number of perforations and abscesses in 2020, in Sweden. In the UK, the number of perforations and abscesses were initially lower (April-June 2020) but increased in July 2020. There was a substantial inter-rater agreement for the diagnosis of perforations and abscess formations (K = 0.64 and 0.77). Conclusion In Sweden, the number of appendicitis was not different between 2019 and 2020; however, there was an increase of complications. In the UK, there was a significant decrease of cases in 2020. The prevalence of complications was lower initially but increased in July. These findings suggest variability in delay in diagnosis of appendicitis depending on the country and time frame studied.
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| 13. |
- van Dijk, S. T., et al.
(författare)
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Observational versus antibiotic treatment for uncomplicated diverticulitis : an individual-patient data meta-analysis
- 2020
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Ingår i: British Journal of Surgery. - : Oxford University Press. - 0007-1323 .- 1365-2168. ; 107:8, s. 1062-1069
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Tidskriftsartikel (refereegranskat)abstract
- Background Two RCTs (AVOD and DIABOLO) demonstrated no difference in recovery or adverse outcomes when antibiotics for acute uncomplicated diverticulitis were omitted. Both trials showed non-significantly higher rates of complicated diverticulitis and surgery in the non-antibiotic groups. This meta-analysis of individual-patient data aimed to explore adverse outcomes and identify patients at risk who may benefit from antibiotic treatment.Methods Individual-patient data from those with uncomplicated diverticulitis from two RCTs were pooled. Risk factors for adverse outcomes and the effect of observational management were assessed using logistic regression analyses. P < 0·025 was considered statistically significant owing to multiple testing adjustment.Results In total, 545 patients in the observational group and 564 in the antibiotics group were included. No statistical differences were found in 1-year follow-up rates of ongoing diverticulitis (7·2 versus 5·0 per cent in observation versus antibiotics groups respectively; P = 0·062), recurrent diverticulitis (8·6 versus 9·6 per cent; P = 0·610), complicated diverticulitis (4·0 versus 2·1 per cent; P = 0·079) and sigmoid resection (5·0 versus 2·5 per cent; P = 0·214). An initial pain score greater than 7, white blood cell count exceeding 13·5 × 109/l and previous diverticulitis at presentation were risk factors for adverse outcomes. Antibiotic treatment did not prevent adverse outcomes in patients at high risk of adverse events.Conclusion Observational management of acute uncomplicated diverticulitis is safe. Some statistical uncertainty remains, depending on the thresholds of clinical relevance, owing to small differences, but no subgroup that would benefit from antibiotic treatment was apparent.
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| 14. |
- Wiklund, Erik, et al.
(författare)
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Lower need for allogeneic blood transfusion after robotic low anterior resection compared with open low anterior resection : a propensity score-matched analysis
- 2023
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Ingår i: Journal of robotic Surgery. - : Springer Nature. - 1863-2483 .- 1863-2491. ; 17:4, s. 1715-1720
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Tidskriftsartikel (refereegranskat)abstract
- Robotic low anterior resection (R-LAR) for rectal cancer may decrease estimated blood loss compared with open low anterior resection (O-LAR). The aim of this study was to compare estimated blood loss and blood transfusion within 30 days after O-LAR and R-LAR. This was a retrospective matched cohort study based on prospectively registered data from Vastmanland Hospital, Sweden. The first 52 patients operated on using R-LAR for rectal cancer at Vastmanland Hospital were propensity score-matched 1:2 with patients who underwent O-LAR for age, sex, ASA (American Society of Anesthesiology physical classification system), and tumor distance from the anal verge. In total, 52 patients in the R-LAR group and 104 patients in the O-LAR group were included. Estimated blood loss was significantly higher in the O-LAR group compared with R-LAR: 582.7 ml (SD +/- 489.2) vs. 86.1 ml (SD +/- 67.7); p < 0.001. Within 30 days after surgery, 43.3% of patients who received O-LAR and 11.5% who received R-LAR were treated with blood transfusion (p < 0.001). As a secondary post hoc finding, multivariable analysis identified O-LAR and lower pre-operative hemoglobin level as risk factors for the need of blood transfusion within 30 days after surgery. Patients who underwent R-LAR had significantly lower estimated blood loss and a need for peri- and post-operative blood transfusion compared with O-LAR. Open surgery was shown to be associated with an increased need for blood transfusion within 30 days after low anterior resection for rectal cancer.
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