Development and validation of a comfort-measuring scale for elderly individuals with chronic conditions

Background: Ageing is associated with chronic diseases and successive losses, which affect the comfort experienced by the elderly. Hence, in that population, comfort must be viewed as a need, and health care professionals (particularly nurses) should promote it through their interventions. This work aimed at developing a scale to assess comfort in elderly individuals with chronic conditions and determining the aforesaid scale’s psychometric characteristics (validity and reliability), while ascertaining the comfort levels experienced by the participants. Methods: Our sample comprised 454 chronically ill elderly individuals, either hospitalized, or in residential care/at home. As regards descriptive statistics, we calculated various summary measures. Validity was appraised via exploratory factor analysis, considering the main components. We performed varimax rotation and factor extraction (in which factors with eigenvalues > 1 were extracted). Reliability was established by calculating internal consistency, using Cronbach’s alpha. For each scale item, we examined the corrected item-test correlation. Additionally, we calculated skewness and kurtosis, also carrying out a confirmatory factor analysis. Results: The exploratory factor analysis produced a scale with 38 items and five factors, which fitted the data and explained a variance of 61.355%. The values of the Kaiser-Meyer-Olkin test and the Bartlett’s test (sphericity) were 0.943 and 12055.962, respectively (both with p < 0.001). Our model was substantiated by the confirmatory factor analysis (χ² = 2884.242; df = 660; RMSEA = 0.086; CFI = 0.811; TLI = 0.798; SRMR = 0.066) and the Cronbach’s alpha coefficient was 0.959. The summary measures showed that, overall, the participants experienced good comfort levels (Mean = 3.64; SD = ±0.676), revealing higher comfort levels in the “Spirituality and meaning of life” dimension (Mean = 3.79; SD = ±0.742) and lower comfort levels in the “Normality of life” dimension (Mean = 3.39; SD = ±0.922). Conclusion: The scale demonstrated suitable psychometric properties, ensuring its validity and reliability in assessing comfort in elderly individuals with chronic conditions. Its five-factor structure enables a comprehensive evaluation, highlighting key comfort dimensions. These findings support targeted interventions, aiding healthcare professionals in improving care and informing evidence-based practices and health policies to enhance well-being. Implications for nursing and health policy: By measuring comfort levels in chronically ill elderly individuals, it is possible to plan/improve the comforting care provided by the involved professionals (namely nurses). Clinical trial number: Not applicable.