title: Dysphagia bedside screening for acute-stroke patients: the Gugging Swallowing Screen.
abstract: OBJECTIVE
  Acute-onset dysphagia after stroke is frequently associated with an increased risk of aspiration pneumonia. Because most screening tools are complex and biased toward fluid swallowing, we developed a simple, stepwise bedside screen that allows a graded rating with separate evaluations for nonfluid and fluid nutrition starting with nonfluid textures. The Gugging Swallowing Screen (GUSS) aims at reducing the risk of aspiration during the test to a minimum; it assesses the severity of aspiration risk and recommends a special diet accordingly.
  
  
  METHODS
  Fifty acute-stroke patients were assessed prospectively. The validity of the GUSS was established by fiberoptic endoscopic evaluation of swallowing. For interrater reliability, 2 independent therapists evaluated 20 patients within a 2-hour period. For external validity, another group of 30 patients was tested by stroke nurses. For content validity, the liquid score of the fiberoptic endoscopic evaluation of swallowing was compared with the semisolid score.
  
  
  RESULTS
  Interrater reliability yielded excellent agreement between both raters (kappa=0.835, P<0.001). In both groups, GUSS predicted aspiration risk well (area under the curve=0.77; 95% CI, 0.53 to 1.02 in the 20-patient sample; area under the curve=0.933; 95% CI, 0.833 to 1.033 in the 30-patient sample). The cutoff value of 14 points resulted in 100% sensitivity, 50% specificity, and a negative predictive value of 100% in the 20-patient sample and of 100%, 69%, and 100%, respectively, in the 30-patient sample. Content validity showed a significantly higher aspiration risk with liquids compared with semisolid textures (P=0.001), therefore confirming the subtest sequence of GUSS.
  
  
  CONCLUSIONS
  The GUSS offers a quick and reliable method to identify stroke patients with dysphagia and aspiration risk. Such a graded assessment considers the pathophysiology of voluntary swallowing in a more differentiated fashion and provides less discomfort for those patients who can continue with their oral feeding routine for semisolid food while refraining from drinking fluids.
authors: Center of Clinical Neurosciences, Danube University, Krems, and the Department of Neurology, Landesklinikum Donauregion, Maria Gugging, Austria.
authors: Michaela
authors: M
authors: Trapl
authors: Paul
authors: P
authors: Enderle
authors: Monika
authors: M
authors: Nowotny
authors: Yvonne
authors: Y
authors: Teuschl
authors: Karl
authors: K
authors: Matz
authors: Alexandra
authors: A
authors: Dachenhausen
authors: Michael
authors: M
authors: Brainin
mesh_terms: D000208:Acute Disease; D000368:Aged; D003679:Deglutition; D003680:Deglutition Disorders / Q000175:diagnosis* / Q000209:etiology* / Q000503:physiopathology; D004945:Esophagoscopy; D004947:Esophagus / Q000503:physiopathology; D005260:Female; D015577:Geriatric Assessment; D006801:Humans; D008297:Male; D008403:Mass Screening / Q000379:methods*; D009460:Neurologic Examination / Q000379:methods; D015588:Observer Variation; D010614:Pharynx / Q000503:physiopathology; D011015:Pneumonia, Aspiration / Q000517:prevention & control*; D019095:Point-of-Care Systems / Q000592:standards*; D011237:Predictive Value of Tests; D011446:Prospective Studies; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D020521:Stroke / Q000150:complications* / Q000503:physiopathology