Intrabiliary rupture of hydatid cysts as a risk factor for postoperative complicationsBackground: Intrabiliary rupture is a complication of hepatic hydatid cysts. Aim: To determine if intrabiliary rupture is a risk factor for postoperative complications of hydatid cysts. Material and Methods: Prospective follow up of patients operated for hepatic hydatid cysts between 1996 and 2006. Patients were evaluated every six months during the first years and every 12 months thereafter. The presence of intrabiliary rupture was evaluated as a risk factor to develop complications during the follow up. Results: Ninety six patients with and 156 patients without intrabiliary rupture, 56% females, aged 42 years, were followed for a mean of 86.5 months. The overall incidence of complications was 17%. The incidence in patients with and without intrabiliary rupture was 9,4 and 21,8% respectively (p = 0.01). The bivariate analysis showed differences between patients with and without complications in leukocyte count, serum bilirubin, alkaline phosphatases, transaminases, cyst diameter, hospital stay and cyst complications. The relative risk for complications of intrabiliary rupture was 3,4 (95% confidence intervals 2,6-4,2). Conclusions: The presence of intrabiliary rupture of a hepatic hydatid cyst is an independent risk factor for the development of complications in the postoperative period.

Design of a methodological quality scale for prognostic studies Background: One of the main classification systems to describe the quality of scientific publications is the level of evidence. However, for our research team, the methodological quality is multidimensional. Aim: To design a scale to determine the methodological quality of studies dealing with prognosis. Material and Method: On a first stage, five professionals with experience in research were interviewed about the items that, in their opinion, must be considered to assess the methodological quality of a manuscript. On a second stage, 121 prognostic studies were critically reviewed by four professionals with research experience In addition, the number of publications of each author was determined and the evidence level of each article was described according to the Oxford Centre for Evidence-based Medicine. A subsequent factorial analysis was performed and the fields and items of the scale were generated. Results: Sixty six percent of reviewed articles had a cohort design (prospective or retrospective), 45% were located at an evidence level 1b and 39% are at an evidence level of 4. After reviewing the articles, a factorial analysis was performed choosing an orthogonal matrix. A scale (MinCir Pr) was generated with a total of 25 items, 6 fields and a Cronbach coefficient alpha of 0.89. Conclusions: A scale to evaluate the methodological quality of prognosis studies (MinCir Pr) was designed, fulfilling rigorous methodological steps and the criterion of multidimensionality for methodological quality.

No abstract

No abstract

RESUMENIntroducción: Una de las variables que se analiza en los estudios bibliométricos es la procedencia de las publicaciones. Este tipo de análisis ha permitido cuantificar el impacto que tienen las distintas universidades o centros hospitalarios en el total de publicaciones de una revista en particular. El objetivo de este estudio es determinar una eventual asociación entre el índice de publicación y la procedencia de los artículos publicados en la Revista Chilena de Cirugía (Rev Chil Cir). Material y método: Estudio bibliométrico. Se analizaron todos los artículos publicados en la Rev Chil Cir entre los años 2002 y 2006. Los artículos se categorizaron de acuerdo al año de publicación, el tipo de artículo, región del país que originó el artículo y la filiación universitaria manifestada en cada artículo. Se calculó la tasa de publicación, el promedio anual y general de publicación, y la tasa de publicación anual promedio (TPAP). Posteriormente, se aplicó estadística analítica para determinar diferencias entre grupos, utilizando T de Student, ANOVA y prueba de comparaciones múltiples de Duncan. Resultados: En el periodo estudiado, se publicaron 545 artículos científicos, con un promedio de 18,2 artículos por número y 109 artículos por volumen. El 67,9 % fue generado por la Región Metropolitana (RM), el 10,8 % por la VIII región y el 7,8 % por la IX región. Solo en un 64,8 % de las publicaciones queda de manifiesto alguna filiación universitaria. Las mayores TPAP correspondieron a los Capítulos IX y VIII Región con 2,3 ± 0,8 y 1,8 ± 0,2 publicaciones/año x 10 miembros (p < 0,05). Conclusiones: Un alto porcentaje de las publicaciones provienen de centros sin filiación universitaria. La mayor TPAP se verificó en regiones.PALABRAS CLAVE: Bibliometría, cirugía. SUMMARYBackground: The analysis of author affiliation of published manuscripts allows an assessment of the impact that different universities or hospitals have on a determinate journal. Aim: To analyze author affiliation of manuscripts published in Revista Chilena de Cirugia. Material and methods: All manuscripts published in the journal between 2002 and 2006, were analyzed. The affiliation of authors, the year of publication and the region of Chile in which the manuscript was generated, were recorded. The publication rate, annual average were calculated. The association of authors to specific regional subsidiaries of the Chilean Society