The new Russian language version of the DS14-RU questionnaire: reliability and validity assessment

Aim: To select new items for a new Russian language version of the DS14-RU scale and to assess the reliability and validity of the new Russian-language version of the questionnaire.Materials and methods: A total of 929 subjects were recruited into the study, including 496 (53.4%) patients with coronary heart disease, 195 (21.0%) patients with chronic heart failure, 84 (9.0%) patients with arterial hypertension, and 154 (16.6%) healthy volunteers. 565 (60.8%) of the participants were men and 364 (39.2%) women. Their age ranged from 21 to 90 years (mean±SD 57.5±12.7 years). The respondents completed the extended and the new DS version, as well as the HADS, MSPSS, RSI, and STPI questionnaires.Results: The prevalence of type D personality by the DS14-RU scale among the patients with cardiovascular diseases was 21.4% and among healthy participants 20.0%. The new DS14-RU version had high internal consistency, with the Cronbach's alpha for the negative affectivity (NA) and social inhibition (SI) subscales of 0.80. The twofactor structure of the DS14-RU was confirmed by and exploratory and confirmatory factor analysis, with χ2 /df, CFI, TLI, IFI, and RMSEA indices for the two-factor solution being 4.7, 0.90, 0.88, 0.90 and 0.069, respectively. It was found that the NA scale was positively correlated with HADS anxiety score, STPI trait anxiety score, HADS depression and STPI depression scores, as well as with RSI psychosocial stress score. Similar but less strong correlations were found for the SI scale. There was also a negative correlation with curiosity and a positive correlation with aggressiveness, as personality traits assessed by STPI.Conclusion: The new Russian-language version of the DS14-RU questionnaire generally corresponds to the English-language version in terms of the reliability and internal structure of the scale. The construct validity of the questionnaire has been confirmed by the results of correlation analysis. Thus, the technique can be used to identify the type D personality