• Felipe Montes Pena, Jamil da Silva Soares, Ronald Souza Peixoto, Herbet Rosa Pires Júnior, Beatriz Tose Costa Paiva, Frederico Vieira Dias Moraes, Patricia Chicharo Engel, Nayara Campos Gomes, and Genevania de Souza Areas Pena.
• Unidade de Terapia Intensiva, Hospital Escola Álvaro Alvim, Rio de Janeiro, RJ, Brasil.
• Rev Bras Ter Intensiva. 2010 Dec 1; 22 (4): 339-45.

ObjectivesThe length of stay after prolonged cardiac surgery has been associated with poor immediate outcomes and increased costs. This study aimed to evaluate the predictive power of the Ambler Score to anticipate the length of stay in the intensive care unit.MethodsThis was a retrospective cohort study based on data collected from 110 patients undergoing valve replacement surgery alone or in combination with other procedures. Additive and logistic Ambler Scores were obtained and their predictive performances calculated using the Receiver Operating Characteristic curve. The normal length stay in the intensive care unit was assumed to be <3 days and prolonged >3 days. The areas under the receiver operating curves for both the additive and logistic models were compared using the Hanley-MacNeil test.ResultsThe mean intensive care unit length of stay was 4.2 days. Sixty-three patients were male. The logistic model showed areas under the receiver operating characteristic curve of 0.73 and 0.79 for hospitalization > 3 days and < 3 days, respectively, showing good discriminative power. For the additive model, the areas were 0.63 and 0.59 for hospitalization > 3 days and < 3 days, respectively, a poor discriminative power.ConclusionsIn our database, prolonged length of stay in the intensive care unit was positively correlated with the logistic Ambler score. The performance of the logistic Ambler Score had good discriminative power for correlation with the intensive care unit length of stay.

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