title: Validation of the Chinese version of the Summated Xerostomia Inventory (SXI).
abstract: OBJECTIVE
  The aim of this study was to validate the Chinese version of the Summated Xerostomia Inventory (SXI).
  
  
  METHODS
  The English SXI was translated into Chinese, cross-cultural adaptation and pilot tested. The final Chinese version of SXI was tested in a consecutive sample of 212 patients with xerostomia. The reliability of the Chinese version of SXI was determined through internal consistency and test-retest methods. The construct validity of SXI was analysed by content validity, construct validity, and convergent validity.
  
  
  RESULTS
  Cronbach's alpha value for the SXI score was 0.798, and the test-retest intraclass correlation coefficient value for the SXI score was 0.837. Construct validity was proved by the presence of one-factor structure that accounted for 57.68 % of the variance and fitted well into the model. The correlation between the total score of the SXI and the global oral health question was 0.75, indicating very good correlation (P < 0.01).
  
  
  CONCLUSIONS
  This study provided preliminary evidence concerning validity and reliability of the Chinese version of the SXI. The results provide initial evidence that the SXI may be a useful tool for the mainland Chinese xerostomia patients for both clinical and epidemiologic researches.
authors.affiliation: Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing, China, songlinhecqmu@163.com.
authors.forename: Song-lin
authors.initials: SL
authors.lastname: He
authors.forename: Jin-hua
authors.initials: JH
authors.lastname: Wang
authors.forename: Min
authors.initials: M
authors.lastname: Li
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D044466:Asian People; D002681:China; D003431:Cross-Cultural Comparison; D005260:Female; D006801:Humans; D007802:Language; D008297:Male; D008875:Middle Aged; D009909:Oral Health; D011594:Psychometrics / Q000379:methods* / Q000706:statistics & numerical data; D011788:Quality of Life; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires / Q000592:standards*; D014175:Translating; D014987:Xerostomia / Q000523:psychology*