title: Development and validation of a subjective post sleep diary (SPSD) to assess sleep status in subjects with restless legs syndrome.
abstract: OBJECTIVE
  To describe the development and psychometric properties of a daily subjective (patient-reported) sleep diary, the Subjective Post Sleep Diary (SPSD), that assesses sleep in relation to Restless Legs Syndrome (RLS).
  
  
  METHODS
  In 2008, the SPSD was developed de novo guided by input from 56 individuals in the US with RLS obtained via focus groups and one-on-one cognitive debriefing sessions. The psychometric properties of the SPSD were evaluated among an additional 470 RLS subjects in the US using three different administration routes; the internet only (N=130), an Interactive Voice Response System (IVRS; N=146) only and a hybrid version (internet and/or IVRS; N=194).
  
  
  RESULTS
  A 12-item sleep diary assessing the key sleep parameters associated with RLS was developed and shown to have face validity following several rounds of focus groups and cognitive debriefing sessions. The SPSD items had high correlations with other sleep instruments and low correlations with constructs unrelated to sleep, and high known-groups predictive ability.
  
  
  CONCLUSIONS
  The Subjective Post Sleep Diary (SPSD) is a short, valid and responsive instrument for measuring RLS-related sleep via the internet, IVRS or a combination of the two modes for US English speakers.
authors: GlaxoSmithKline, P.O. Box 13398, Research Triangle Park, NC 27709-3398, USA. Michael.O.Calloway@GSK.com
authors: Michael
authors: M
authors: Calloway
authors: Murtuza
authors: M
authors: Bharmal
authors: Christina
authors: C
authors: Hill-Zabala
authors: Richard
authors: R
authors: Allen
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D017144:Focus Groups; D006801:Humans; D008297:Male; D008499:Medical Records / Q000592:standards*; D008875:Middle Aged; D011237:Predictive Value of Tests; D011594:Psychometrics / Q000379:methods* / Q000592:standards*; D015203:Reproducibility of Results; D012148:Restless Legs Syndrome / Q000150:complications*; D012890:Sleep; D012893:Sleep Wake Disorders / Q000175:diagnosis* / Q000209:etiology*; D055815:Young Adult