Fragility influences the impact of self-care behavior on patient-reported outcomes further of psychosocial factors of self-perceived health status in patients with heart failure

Abstract

Abstract Background Poor self-care behaviour is associated with a higher risk of readmission and mortality in patients with heart failure (HF). Psychosocial factors are key determinants of patient-reported outcomes (PROMs) such as health-realted quality of life (QoL). Little is known about the interplay between self-care and psychosocial factors on PROMs in HF. Purpose To describe the interaction of self-care and psycho-social factors on QoL in a real-world cohort of HF patients. Methods We conducted an observational, prospective, cohort study of 1120 consecutive patients with chronic. We used the modified European Heart Failure Self-care Behaviour Scale 9-item version (EHFSCBS-9) to measure self-care (inverted and standardised: higher scores indicate better self-care). To assess QoL, we used Minnesota Living with Heart Failure Questionnaire (MLHFQ) (higher scores indicate worse QoL). General linear models (GLM) were constructed to explore the interaction between psychosocial factors and poor self-care (defined as EHFSCBS-9 ≤lower tertile) on adjusted MLHFQ scores. To determine the impact of self-care, multivariate linear regressions models to predict QoL were constructed stratified according to selected psycho-social determinants. All models were adjusted by age, sex and psycho-social determinants of QoL including literacy, cognitive function (Pfeiffer test), dependency (Barthel and Lawton & Brody test), social support (Duke UNC and APGAR Familyfunction), depressive symptoms (15-item Geriatric Depression Scale) and fragility (Barber test scores ≥1). Results A total of 484 patients (43%) were women, mean age was 72±11 years, and mean LVEF was 45±17%. Mean MLHFQ scores were 45±24. Mean EHFSCBS-9 scores were 69±28. There was a significant inverse correlation between EHFScBS-9 and MLHFQ scores (r=−0.158; p-value <0.0001). Fragility was present in 883 patients (79%). In adjusted GLM, poor self-care (F=10.2; p-value=0.001) and fragility (F=17.9; p-value <0.001) were independent predictors of higher adjusted scores in the MLHFQ indicating worse QoL. As shown in Figure 1, the interaction between fragility and self-care was significant (F=6.8; p-value = 0.009). Linear regression models (Table 1) stratified according the absence (panel A) or the presence (panel B) of fragility showed that fragility modulated the association between self-care behaviour and QoL. Only in patients without fragility, self-care were independent predictors of QoL. On the other hand, in patients with fragility, self-care behaviour did not longer influence self-perceived health status in patients with HF. Conclusions We have shown that self-care behaviour is an independent predictor of PROMs in HF regardless the presence of important psycho-social determinants of QoL only when fragility status is taken into account. Fragility modulates the influence of self-care and QoL, including each one of its dimensions. Funding Acknowledgement Type of funding sources: None.