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The REM Sleep Behavior Disorder (RBD) Questionnaire - Hong Kong (RBDQ-HK)
Please visit this website for more information about the instrument: The REM Sleep Behavior Disorder Questionnaire - Hong Kong
Supplemental: Parkinson's Disease (PD)
Short Description of Instrument
RBDQ-HK consists of 13 items designed to assess various symptoms that correspond to two essential clinical aspects of RBD - dream-related features and behavioral manifestation.
Each item is rated on two scales - lifetime occurrence and recent one-year frequency.
Comments/Special Instructions
RBDQ-HK that can be utilized for clinical screening and treatment monitoring.
Scoring and Psychometric Properties
Scoring: Respondents are asked to indicate whether they have experienced the symptoms in their lifetime (no/don't know = 0, yes = 1) and the frequency of the symptoms over the past year (none = 0, once or few times a year = 1, once or few times a month = 2, once or twice a week = 3, at least three times a week = 4). The scores of items 6-12 (sleep talking, sleep shouting, dream-related movements, falling out of bed, attempt to assault/injure, sleep related injury [SRI], and SRI related to dream content) were additionally weighted (doubled) to address the clinical importance of the behavioral aspects of RBD. The total RBDQ-HK score is calculated by adding up the scores from the lifetime and recent one-year scales, with a range from 0 to 100.
Psychometric Properties:
  • Good internal consistency (Cronbach's alpha coefficient: 0.9 for the overall scale, 0.86 and 0.86 for dream-related and behavioral factors, respectively)
  • Good test-retest reliability (0.89 and 0.80 for the lifetime and recent one-year frequency scales, respectively).
  • Sensitivity = 82%
  • Specificity = 87%
  • Negative predictive value = 86%
  • Positive predictive value = 83%
Strengths: In addition to screening/diagnosis, the scale can be used to monitor symptomatic treatment effects.
Key Reference:
Li SX, Wing YK, Lam SP, Zhang J, Yu MW, Ho CK, Tsoh J, Mok V. Validation of a new REM sleep behavior disorder questionnaire (RBDQ-HK). Sleep Med. 2010 Jan;11(1):43-8.
Additional References:
Li SX, Lam SP, Zhang J, Yu MW, Chan JW, Liu Y, Lam VK, Ho CK, Zhou J, Wing YK. A prospective, naturalistic follow-up study of treatment outcomes with clonazepam in rapid eye movement sleep behavior disorder. Sleep Med. 2016 May;21:114-20.
Shen SS, Shen Y, Xiong KP, Chen J, Mao CJ, Huang JY, Li J, Han F, Liu CF. Validation study of REM sleep behavior disorder questionnaire-Hong Kong (RBDQ-HK) in east China. Sleep Med. 2014 Aug;15(8):952-8.
Document last updated August 2022