Frequency of cholecystectomy and associated sociodemographic and clinical risk factors in the ELSA-Brasil study / Frequência de colecistectomia e fatores de risco sociodemográficos e clínicos associados no estudo ELSA-Brasil

ABSTRACT: CONTEXT AND OBJECTIVE: There are few data in the literature on the frequency of cholecystectomy in Brazil. The frequency of cholecystectomy and associated risk factors were evaluated in the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil). DESIGN AND SETTING: Cross-sectional study using baseline data on 5061 participants in São Paulo. METHODS: The frequency of cholecystectomy and associated risk factors were evaluated over the first two years of follow-up of the study and over the course of life. A multivariate regression analysis was presented: odds ratio (OR) and 95% confidence interval (95% CI). RESULTS: A total of 4716 individuals (93.2%) with information about cholecystectomy were included. After two years of follow-up, 56 had undergone surgery (1.2%: 1.7% of the women; 0.6% of the men). A total of 188 participants underwent cholecystectomy during their lifetime. The risk factors associated with surgery after the two-year follow-up period were female sex (OR, 2.85; 95% CI, 1.53-5.32), indigenous ethnicity (OR, 2.1; 95% CI, 2.28-15.85) and body mass index (BMI) (OR, 1.10; 95% CI, 1.01-1.19 per 1 kg/m2 increase). The risk factors associated over the lifetime were age (OR, 1.03; 95% CI, 1.02-1.05 per one year increase), diabetes (OR, 1.92; 95% CI, 1.34-2.76) and previous bariatric surgery (OR, 5.37; 95% CI, 1.53-18.82). No association was found with parity or fertile age. CONCLUSION: Female sex and high BMI remained as associated risk factors while parity and fertile age lost significance. New factors such as bariatric surgery and indigenous ethnicity have gained importance in this country.

RESUMO CONTEXTO E OBJETIVO: Há escassez de dados na literatura sobre a frequência de colecistectomia no Brasil. Avaliou-se a frequência de colecistectomia e os fatores de risco associados no Estudo Longitudinal de Saúde do Adulto (ELSA-Brasil). DESENHO E LOCAL: Estudo transversal com dados da linha de base de 5061 participantes em São Paulo. MÉTODOS: Avaliou-se a frequência de colecistectomia e fatores de risco associados nos dois primeiros anos de seguimento do estudo e ao longo da vida. Apresentou-se regressão logística [razão de chances (RC); intervalo de confiança de 95% (IC 95%)] multivariada. RESULTADOS: Um total de 4716 (93,2%) indivíduos com informação sobre colecistectomia foi incluído. Após 2 anos de seguimento, 56 participantes tinham sido operados (1,2%: 1,7% nas mulheres; 0,6% nos homens), totalizando 188 participantes com colecistectomia durante a vida. Os fatores de risco associados à cirurgia após dois dois anos de seguimento foram sexo feminino (RC, 2,85; IC 95%, 1,53-5,32), etnia indígena (RC, 2,1; IC 95%, 2,28-15,85) e índice de massa corpórea, IMC (RC, 1,10; IC 95%, 1,01-1,19 por aumento de 1 kg/m2); e, ao longo da vida: idade (RC, 1,03; IC 95%, 1,02-1,05 por um ano de aumento), diabetes (RC, 2,10; IC 95%, 1,34-2,76) e cirurgia bariátrica prévia (RC, 5.37; IC 95%, 1,53-18,82). Não se observou associação com paridade ou idade fértil. CONCLUSÃO: Sexo feminino e IMC elevado permanecem sendo fatores de risco associados à colecistectomia, mas paridade e idade fértil perderam significância. Novos fatores de risco, como cirurgia bariátrica prévia e etnia indígena, ganharam relevância no país.

Acceso a colecistectomía en un programa de tamizaje ecográfico de colelitiasis en centros de medicina familiar / Access to cholecystectomy among patients attended at primary family health centers

Background: Cholelithiasis (CL) represents a major health burden in Chile, with rates of cholecystectomy (CCT) of ~40.000 per year. The explicit health care guaranties (GES) program includes prioritized CCT for CL carriers between 35 and 49 years of age. Aim: To assess the access and opportunity of CCT in a screening program of CL in Family Medicine Centers, according to the age of the patients. Material and Methods: A systematic ultrasound screening program of CL was developed in Family Medicine Centers ANCORA-UC between March 2009 and March 2013 during which 1.450 individuals were assessed, (80% women) and 281 were identified as having CL (19.4%). After a minimum follow up interval of six months, patients with CL were contacted and surveyed by phone. They were categorized as being beneficiaries of the GES program (those aged between 35 to 49 years) or not (those aged < 35 o > 49 years). Results: Two hundred thirteen patients were contacted (76%), 81 beneficiaries of the program and 132 non-beneficiaries. The attending physician indicated CCT to 191 patients (89.6%). During a mean follow-up time of 641 days/person, 100 patients had CCT, 11% of which were emergency interventions due to complications. A greater proportion of program beneficiaries than non-beneficiaries had an elective CCT (74 and 21% respectively). The waiting interval for elective CCT was longer in non-beneficiaries compared with beneficiaries (340 ± 247 and 229 ± 201 days respectively). Only 46% of the elective CCT in GES patients were done within deadlines determined by the program (≤ 150 days). Conclusions: The age of patients at the moment of CL diagnosis conditions the access and opportunity to CCT. Beneficiaries of the explicit health care guaranties program have higher rates of cholecystectomy with less waiting time.

What necessitates the conversion to open cholecystectomy? A retrospective analysis of 5164 consecutive laparoscopic operations

OBJECTIVE: Laparoscopic cholecystectomy (LC) has become the gold standard for the surgical treatment of gallbladder disease, but conversion to open cholecystectomy is still inevitable in certain cases. Knowledge of the rate and impact of the underlying reasons for conversion could help surgeons during preoperative assessment and improve the informed consent of patients. We decided to review the rate and causes of conversion from laparoscopic to open cholecystectomy. METHOD: This study included all laparoscopic cholecystectomies due to gallstone disease undertaken from May 1999 to June 2010. The exclusion criteria were malignancy and/or existence of gallbladder polyps detected pathologically. Patient demographics, indications for cholecystectomy, concomitant diseases, and histories of previous abdominal surgery were collected. The rate of conversion to open cholecystectomy, the underlying reasons for conversion, and postoperative complications were also analyzed. RESULTS: Of 5382 patients for whom LC was attempted, 5164 were included this study. The overall rate of conversion to open cholecystectomy was 3.16 percent (163 patients). There were 84 male and 79 female patients; the mean age was 52.04 years (range: 26-85). The conversion rates in male and female patients were 5.6 percent and 2.2 percent, respectively (p<0.001). The most common reasons for conversion were severe adhesions caused by tissue inflammation (97 patients) and fibrosis of Calot's triangle (12 patients). The overall postoperative morbidity rate was found to be 16.3 percent in patients who were converted to open surgery. CONCLUSION: Male gender was found to be the only statistically significant risk factor for conversion in our series. LC can be safely performed with a conversion rate of less than 5 percent in all patient groups.

Cáncer de vesícula biliar: Tendencia y distribución del riesgo en Chile / Gallbladder cancer: trend and risk distribution in Chile

Background: Gallbladder cancer (GBC) is the first cause of death by cancer among Chilean women and mortality has not improved in the last 20 years. Aim: To study GBC mortality trend from 1985-2002, analyze risk differentials by age, sex, geographic region and accessibility to surgery. Material and Methods: Mortality data was obtained from death certificate databases. Population data was obtained from the census and biliary surgery information, from Ministry of Health registries. Standardized Mortality rates were based in the world population; trend was analyzed with point of change methods. Results: From 1985 to 2002, 27,183 GBC deaths occurred, 1,510 per year. The absolute number of deaths increased in 65% but standardized mortality rates remained unchanged at 11.3 per 100,000. These were higher among women than men (15.6 and 7.0, respectively, with a risk ratio of 2.2). Sex ratio peaked at ages 35-54 with risk ratio of 4.1. Death risk increased from North to South, peaking in poorer areas, especially in places with rural population and Mapuche ethnic admixture. Mortality appear to correlate with the rate of people waiting for gallbladder surgery, but not reaching statistical significance (r2 0.27, ns). Compared with other countries, Chile has a higher rate of GBC deaths in relation to its gross domestic product per capita. Conclusions: There is a high and persistent persistent risk for GBC in Chile, particularly among women, from the Southern regions where gallbladder surgery is insufficient for the needs, as reflected by the rates of people waiting for biliary surgery. GBC rates could be dropped by offering gallbladder surgery to everyone waiting for it and to those incident cases with gallstones.