LAUSR

Figure 1. Prognostic value of Swallow Gateway-derived pressure flow index (PFI) for predicting esophageal dysphagia symptoms. Thirteen children (aged 6.8–15.5 years) undergoing work-up prior to 360-degree Nissen fundoplication. A dysphagia score assessed symptoms at preand postoperative time points. Only data for 5 ml extremely thick consistency boluses are shown as these were the most predicative of outcome. (a) Grouping of individual patients by preand postoperative dysphagia symptom scores. (b) Individual preoperative PFI results for patients grouped for postoperative dysphagia status (as in (a)). (c) Preoperative PFI in patients ranked by postoperative dysphagia outcome (best to worst). (d) Scatter plot of postoperative dysphagia score vs preoperative PFI (r and p value is for Spearman Rank correlation). (e) Receiver operator characteristic (ROC) curve for preoperative PFI as a dichotomous predictor of a postoperative dysphagia; any dysphagia and dysphagia score >10 (of maximum 45). sens: sensitivity; spec: specificity.