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The purpose of this study is to use 24 variables to develop a clinical prediction rule for gastric tube insertion distance in adults, using the internal-nares-to-distallower esophageal-sphincter distance. A three-variable model using gender, weight, and nose-umbilicus-flat was selected. This new model, validated using nonparametric bootstrap cross-validation, correctly predicted gastric tube insertion distance 85.3% of the time. This new model is compared to two other methods, one evidence based and one commonly used in practice, and was found to be superior. Two nomograms, one for each gender, are drawn to make this new model easier to use.<\/jats:p>","DOI":"10.1177\/1054773804270919","type":"journal-article","created":{"date-parts":[[2004,12,16]],"date-time":"2004-12-16T13:04:19Z","timestamp":1103202259000},"page":"11-27","source":"Crossref","is-referenced-by-count":26,"title":["Predicting the Insertion Distance for Placing Gastric Tubes"],"prefix":"10.1177","volume":"14","author":[{"given":"Marsha L. 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