title: Validation of the Japanese translation of the Swallowing Disturbance Questionnaire in Parkinson's disease patients.
abstract: OBJECTIVE
  The Swallowing Disturbance Questionnaire (SDQ) was developed as a self-rated screening tool for dysphagia in patients with Parkinson's disease (PD). We developed the Japanese version of this questionnaire (SDQ-J), according to the cross-cultural adaptation guidelines, and examined its reliability.
  
  
  METHODS
  Subjects were 61 Japanese patients with PD (mean age, 67.0 ± 9.2 years) who answered the SDQ-J before undergoing videofluoroscopic examination of swallowing (VF). We compared the findings of the questionnaire with the patients' aspiration status during VF.
  
  
  RESULTS
  Cronbach's alpha coefficient for the 15 questions of the SDQ-J was 0.84. According to the SDQ-J, 15 patients (24.6%) were diagnosed with dysphagia, while 9 patients (14.8%) aspirated liquid during VF. The sensitivity and specificity of the SDQ-J in predicting aspiration were 77.8 and 84.6%, respectively; therefore, the SDQ-J significantly predicted aspiration during VF (P < 0.01). The positive predictive value (PPV) and negative predictive value (NPV) for the SDQ-J were 0.46 and 0.96, respectively.
  
  
  CONCLUSIONS
  The SDQ-J appears to be a reliable and useful screening tool for Japanese PD patients with aspiration. As the NPV was higher than the PPV in the SDQ-J, this questionnaire could potentially be used for early identification of severe dysphagia in patients with PD.
authors: Department of Neurology, National Center Hospital of Neurology and Psychiatry, Kodaira, Tokyo 187-8551, Japan. yamamoto@ncnp.go.jp
authors: Toshiyuki
authors: T
authors: Yamamoto
authors: Kensuke
authors: K
authors: Ikeda
authors: Harumi
authors: H
authors: Usui
authors: Masako
authors: M
authors: Miyamoto
authors: Miho
authors: M
authors: Murata
mesh_terms: D000368:Aged; D003680:Deglutition Disorders / Q000145:classification* / Q000209:etiology*; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000150:complications* / Q000503:physiopathology; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D018434:Sickness Impact Profile; D011795:Surveys and Questionnaires / Q000592:standards