title: Eliciting information on differential sensation of heat in those with and without poststroke aphasia using a visual analogue scale.
abstract: OBJECTIVE
  Aphasia can result in an inability to communicate the presence, location, or intensity of pain. Although visual analogue scales (VASs) exist, it is unknown whether they are useful in assessing pain in individuals with aphasia. The objective was to determine whether those with poststroke aphasia could respond differentially to thermal stimuli of varying intensities using a standardized VAS.
  
  
  METHODS
  Five groups of participants were assessed: those without stroke, those with stroke but without aphasia, and 3 groups with varying degrees of aphasia. A 10-cm vertical VAS was used to measure responses to varying thermal intensities delivered on the participant's forearm.
  
  
  RESULTS
  Across all 5 groups, a similar proportion demonstrated ability to discriminate between 2 temperatures (chi2=1.899; P=0.75). When presented with 4 temperatures, all groups performed more poorly, yet with similar success rates across groups (chi2=0.1267; P=0.88). The repeated-measures ANOVA revealed no effect of group but a significant effect of temperature (P<0.0001).
  
  
  CONCLUSIONS
  A VAS may be useful in clinical identification of differing intensities of stimuli in a substantial proportion of those with aphasia.
authors.affiliation: School of Physical and Occupational Therapy, McGill University, Faculty of Medicine, Montreal, Quebec, Canada. nicol.korner-bitensky@mcgill.ca
authors.forename: Nicol
authors.initials: N
authors.lastname: Korner-Bitensky
authors.forename: Eva
authors.initials: E
authors.lastname: Kehayia
authors.forename: Nicole
authors.initials: N
authors.lastname: Tremblay
authors.forename: Barbara
authors.initials: B
authors.lastname: Mazer
authors.forename: Fanny
authors.initials: F
authors.lastname: Singer
authors.forename: Jill
authors.initials: J
authors.lastname: Tarasuk
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000704:Analysis of Variance; D001037:Aphasia / Q000175:diagnosis* / Q000209:etiology; D015331:Cohort Studies; D005260:Female; D006358:Hot Temperature; D006801:Humans; D007802:Language; D008297:Male; D008875:Middle Aged; D015233:Models, Statistical; D010146:Pain; D010147:Pain Measurement; D012677:Sensation; D012684:Sensory Thresholds; D020521:Stroke / Q000150:complications / Q000473:pathology / Q000503:physiopathology*; D013696:Temperature; D013823:Thermoreceptors / Q000502:physiology*