Table 1_Adapting the acceptance of illness scale for Sinhala-speaking populations: a psychometric study.docx

Principal component analysis (PCA) and confirmatory factor analysis (CFA) were conducted to evaluate the scale’s dimensional structure. Cronbach’s α was used to assess internal consistency, and r Pearson correlations with measures of life satisfaction and depression were employed to examine convergent validity.</p>Results<p>The Sinhala AIS demonstrated satisfactory internal consistency (Cronbach’s α = 0.75). PCA supported a single-component structure consistent with the original version, explaining 52.66% of the total variance.

Subsequent CFA conducted on the same sample provided partial support for the one-factor structure (CFI = 0.99, AGFI = 0.97, TLI = 0.99, SRMR = 0.06, RMSEA = 0.097). Acceptance of illness was positively correlated with life satisfaction (r = 0.253) and negatively correlated with depression (r = −0.336), providing preliminary evidence for construct validity.</p>Conclusion<p>The findings provide preliminary support for the reliability and construct validity of the Sinhala AIS among Sinhala-speaking adults with chronic diseases and encourage further research on its psychometric properties and applicability in diverse clinical populations.

The scale may be a useful tool for research and potentially for clinical applications; however, further validation is recommended.</p>