Reliability of a patient-reported outcome measure in schizophrenia: Results from back-to-back self-ratings

Hiroyoshi Takeuchi, Gagan Fervaha, Gary Remington

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


This study aimed to assess patient's capacity to perform a patient-reported outcome (PRO) measure (i.e., a self-rating scale) and examine its relationship with clinical characteristics including cognition. Fifty patients with schizophrenia were asked to rate the Subjective Well-being under Neuroleptics scale – Short form (SWNS) twice; the second rating was started immediately after they completed the first to minimize the gap between ratings. At the same time, the Positive and Negative Symptoms Scale (PANSS) and Brief Neurocognitive Assessment (BNA) were administered. The correlations between the two ratings for the SWNS total and each item scores were high (rs=0.94 and rs=0.60–0.84, respectively); however, for 16 (80%) of 20 items, 5 or more patients (i.e., ≥10%) demonstrated a>1 point score difference. There was no significant correlation between the SWNS total score difference and any clinical characteristics including age, education duration, illness duration, antipsychotic dose, psychopathology, and cognition. In contrast, the number of items with a>1 point score difference was significantly correlated with disorganized symptoms and overall severity (rs=0.29 for both), as well as working memory and global cognition (rs=−0.41 and rs=−0.40, respectively). These findings suggest that PROs should be interpreted with caution in patients with schizophrenia with prominent disorganization and cognitive impairment.

Original languageEnglish
Pages (from-to)415-419
Number of pages5
JournalPsychiatry Research
Publication statusPublished - 2016 Oct 30


  • Cognition
  • Patient-reported outcome measures
  • Reliability
  • Schizophrenia
  • Self-rating
  • Subjective well-being

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Biological Psychiatry


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