Quality of Life Research

, Volume 21, Issue 7, pp 1299–1303 | Cite as

Validation of the Japanese translation of the Swallowing Disturbance Questionnaire in Parkinson’s disease patients

  • Toshiyuki YamamotoEmail author
  • Kensuke Ikeda
  • Harumi Usui
  • Masako Miyamoto
  • Miho Murata
Brief Communication



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.


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.


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.


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.


Parkinson’s disease Dysphagia Questionnaires Fluoroscopy 



Parkinson’s disease


Videofluoroscopic examination of swallowing


Swallowing Disturbance Questionnaire


Japanese version of the SDQ




Positive predictive value


Negative predictive value


Speech and language pathologist


Fiberoptic endoscopic evaluation of swallowing



The authors thank Y. Manor (Tel-Aviv Sourasky Medical Center) for the permission to use the SDQ and proofreading the back translation. This work was supported by a TMC Young Investigator Fellowship from the National Center of Neurology and Psychiatry (NCNP), Japan, and by an Intramural Research Grant (22–Y2) for Neurological and Psychiatric Disorders that was also awarded by the NCNP.


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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Toshiyuki Yamamoto
    • 1
    Email author
  • Kensuke Ikeda
    • 1
  • Harumi Usui
    • 2
  • Masako Miyamoto
    • 3
  • Miho Murata
    • 1
  1. 1.Department of NeurologyNational Center Hospital of Neurology and PsychiatryKodairaJapan
  2. 2.Department of NursingNational Center Hospital of Neurology and PsychiatryKodairaJapan
  3. 3.Department of Rehabilitation MedicineNational Center Hospital of Neurology and PsychiatryKodairaJapan

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