title: Development of the Subjective Memory Complaints Questionnaire.
abstract: OBJECTIVE
  We aimed to evaluate the psychometric properties of the Subjective Memory Complaints Questionnaire (SMCQ).
  
  
  METHODS
  The reliability of the SMCQ was evaluated by testing its internal consistency and test-retest reliability. Pearson correlation analyses were performed to assess the concurrent validity. Confirmatory factor analysis was used to evaluate the construct validity. Diagnostic ability for dementia was tested with receiver operator characteristic curve analyses.
  
  
  RESULTS
  Cronbach's alpha coefficient and intraclass correlation coefficients of the SMCQ were 0.864 and 0.828 (p < 0.001), respectively. The SMCQ scores were significantly correlated with the scores on Camdex Memory Complaint Questionnaire, Seoul Informant Report Questionnaire for Dementia and cognitive tests from the CERAD (Consortium to Establish a Registry for Alzheimer's Disease) neuropsychological test battery (p < 0.01). The results of confirmatory factor analyses confirmed that the SMCQ consisted of subjective memory complaints (SMC) for general memory and for everyday memory. The SMCQ score discriminated well between nondemented elderly without dementia and those with dementia (p < 0.01). The area under the curve value of the SMCQ was 0.84, indicating that it had high diagnostic ability.
  
  
  CONCLUSIONS
  The SMCQ was found to be a brief, reliable and valid questionnaire for evaluating SMC. It might be useful for evaluating the cognition of elderly subjects when reliable informants are not available.
authors.affiliation: Department of Neuropsychiatry, Kyunggi Provincial Hospital for the Elderly, Yongin, Korea.
authors.forename: Jong Chul
authors.initials: JC
authors.lastname: Youn
authors.forename: Ki Woong
authors.initials: KW
authors.lastname: Kim
authors.forename: Dong Young
authors.initials: DY
authors.lastname: Lee
authors.forename: Jin Hyeong
authors.initials: JH
authors.lastname: Jhoo
authors.forename: Seok Bum
authors.initials: SB
authors.lastname: Lee
authors.forename: Joon Hyuk
authors.initials: JH
authors.lastname: Park
authors.forename: Eun Ae
authors.initials: EA
authors.lastname: Choi
authors.forename: Jin Yeong
authors.initials: JY
authors.lastname: Choe
authors.forename: Ji Woon
authors.initials: JW
authors.lastname: Jeong
authors.forename: Il Han
authors.initials: IH
authors.lastname: Choo
authors.forename: Jong Inn
authors.initials: JI
authors.lastname: Woo
mesh_terms: D000368:Aged; D003704:Dementia / Q000175:diagnosis / Q000523:psychology; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008297:Male; D008569:Memory Disorders / Q000175:diagnosis* / Q000523:psychology*; D009483:Neuropsychological Tests; D011569:Psychiatric Status Rating Scales; D011594:Psychometrics; D011597:Psychomotor Performance / Q000502:physiology; D012372:ROC Curve; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires