1,721,149 research outputs found
Risk factors for unfavourable postoperative outcome in patients with Crohn's disease undergoing right hemicolectomy or ileocaecal resection. An international audit by ESCP and S-ECCO
No full textAim Patient- and disease-related factors, as well asoperation technique, all have the potential to impact onpostoperative outcome in Crohn’s disease. The availableevidence is based on small series and often displays con-flicting results. The aim was to investigate the effect ofpreoperative and intra-operative risk factors on 30-daypostoperative outcome in patients undergoing surgeryfor Crohn’s disease.Method This was an international prospective snapshotaudit including consecutive patients undergoing righthemicolectomy or ileocaecal resection. The study anal-ysed a subset of patients who underwent surgery forCrohn’s disease. The primary outcome measure was theoverall Clavien–Dindo postoperative complication rate.The key secondary outcomes were anastomotic leak,reoperation, surgical site infection and length of stay inhospital. Multivariable binary logistic regression analyseswere used to produce odds ratios and 95% confidenceintervals.Results In all, 375 resections in 375 patients wereincluded. The median age was 37 and 57.1% werewomen. In multivariate analyses, postoperative compli-cations were associated with preoperative parenteralnutrition (OR 2.36, 95% CI 1.10–4.97), urgent/expe-dited surgical intervention (OR 2.00, 95% CI1.13–3.55) and unplanned intra-operative adverseevents (OR 2.30, 95% CI 1.20–4.45). The postopera-tive length of stay in hospital was prolonged in patientswho received preoperative parenteral nutrition (OR 31,95% CI 1.08–1.61) and those who had urgent/expe-dited operations (OR 1.21, 95% CI 1.07–1.37).Conclusion Preoperative parenteral nutritional support,urgent/expedited operation and unplanned intra-operativeadverse events were associated with unfavourable postoper-ative outcome. Enhanced pre operative op timization andimproved planning of operation pathways and timings mayimprove outcomes for patients
The popliteal artery entrapment syndrome. Personal experience
No full textThe popliteal artery entrapment syndrome. Personal experienc
Predictors for anastomotic leak, postoperative complications, and mortality after right colectomy for cancer. Results from an international snapshot audit
No full textBACKGROUND: A right hemicolectomy is among the most commonly performed operations for colon cancer, but modern high-quality, multination data addressing the morbidity and mortality rates are lacking. OBJECTIVE: This study reports the morbidity and mortality rates for right-sided colon cancer and identifies predictors for unfavorable short-term outcome after right hemicolectomy. DESIGN: This was a snapshot observational prospective study. SETTING: The study was conducted as a multicenter international study. PATIENTS: The 2015 European Society of Coloproctology snapshot study was a prospective multicenter international series that included all patients undergoing elective or emergency right hemicolectomy or ileocecal resection over a 2-month period in early 2015. This is a subanalysis of the colon cancer cohort of patients. MAIN OUTCOME MEASURES: Predictors for anastomotic leak and 30-day postoperative morbidity and mortality were assessed using multivariable mixed-effect logistic regression models after variables selection with the Lasso method. RESULTS: Of the 2515 included patients, an anastomosis was performed in 97.2% (n = 2444), handsewn in 38.5% (n = 940) and stapled in 61.5% (n = 1504) cases. The overall anastomotic leak rate was 7.4% (180/2444), 30-day morbidity was 38.0% (n = 956), and mortality was 2.6% (n = 66). Patients with anastomotic leak had a significantly increased mortality rate (10.6% vs 1.6% no-leak patients; p > 0.001). At multivariable analysis the following variables were associated with anastomotic leak: longer duration of surgery (OR = 1.007 per min; p = 0.0037), open approach (OR = 1.9; p = 0.0037), and stapled anastomosis (OR = 1.5; p = 0.041). LIMITATIONS: This is an observational study, and therefore selection bias could be present. For this reason, a multivariable logistic regression model was performed, trying to correct possible confounding factors. CONCLUSIONS: Anastomotic leak after oncologic right hemicolectomy is a frequent complication, and it is associated with increased mortality. The key contributing surgical factors for anastomotic leak were anastomotic technique, surgical approach, and duration of surgery
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
- …
