Early factors associated with negative appendectomy
Factores tempranos asociados a apendicectomía negativa Early factors associated with negative appendectomy
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Abstract
Objective. To analyze predictive characteristics of negative appendectomy (NA) in a cohort of patients who underwent surgery during 2018 in a high complexity healthcare institution in the city of Medellín, Colombia. Materials and Methods. Retrospective follow-up to a cohort based on medical records. We analyzed adult patients who underwent appendectomy. We stimated the rate of AN and described the clinical, paraclinical and sociodemographic characteristics. The analysis of predictors of AN was carried out using the generalized linear model binomial family, logarithmic link. Observed and adjusted risk ratios (RR) are presented along with 95% confidence intervals (95% CI). For the multivariate model, the area under the receiver operator curve (ROC) was estimated. Results. The AN rate was 5.2%. Abdominal computed tomography (CT) was not requested in 48.9% of the cases, 4.1% of the patients had dysuria. Among the factors studied, dysuria, non-request for CT, age and leukocytosis were significantly associated with a higher risk of AN. Is worth noting that the adjusted risk of AN of the patients who presented with dysuria and those in which no CT was requested, was 30.3% (RR = 17.31; 95% CI 5.00 - 59.87). ROC was 0.834. Conclusions. When defining the need for diagnostic imaging and surgical management of patients with suspected acute appendicitis, patients who report dysuria are high risk group of negative appendectomy, which could be suggestive of the need for CT.
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