Validating the short-version European Health Literacy Survey Questionnaire for community-dwelling older adults in Japan.

The European Health Literacy Survey Questionnaire (HLS-EU-Q47) is available in multiple languages, and shortened versions have also been developed. This study aimed to examine the reliability and validity of the short version of the questionnaire (HLS-Q12) developed for community-dwelling older adults in Japan. The HLS-Q12 was developed using 12 of the 47 items of the Japanese version of the HLS-EU-Q47. In this study, the survey was conducted by distributing self-administered questionnaires to community-dwelling individuals aged 65 years and older who consented to participate; their responses were collected by mail. The correlation between the HLS-Q12 and the HLS-EU-Q47 was tested to assess criterion validity. To test construct validity, nine novel hypotheses were proposed. We also conducted a confirmatory factor analysis of the HLS-Q12. Based on a resurvey after 5–7 days, test–retest reliability was examined using interclass correlation coefficients (ICCs) and Bland–Altman analysis. In total, 118 individuals provided valid responses to the questionnaire. The Spearman rank correlation coefficient between the HLS-Q12 and the HLS-EU-Q47 was r  = 0.98 (p  < 0.001), and eight of the nine hypotheses were supported. The ICC was 0.96 (p  < 0.001), and the 95% limit of agreement was −0.26 ± 5.9, suggesting no systematic error. Thus, the Japanese version of the HLS-Q12 was found to be reliable with high criterion validity and reproducibility. Hence, the HLS-Q12 is a useful scale for measuring health literacy among older adults in Japan. [ABSTRACT FROM AUTHOR]