Homebound elderly people psychotherapeutic intervention (HEPPI): Exploring the mediating role of loneliness

Objectives: The present study aimed to explore whether the Homebound Elderly People Psychotherapeutic Intervention (HEPPI), a home-delivered ten-week cognitive-emotional intervention, was effective in reducing self-reported loneliness among homebound older adults presenting mild cognitive impairment and psychological symptomatology. Effects of HEPPI in total, social, and emotional loneliness, compared with a treatment-as-usual group, were investigated at post-intervention and 3-month follow-up. In addition, the potential role of social and emotional loneliness as mediators of the HEPPI impact on episodic memory and symptoms of depression and anxiety was examined.Methods: This study built upon the data of a previously conducted randomized controlled trial. Participants were randomly assigned to the HEPPI group (n = 98) or the treatment-as-usual group (n = 101) and completed baseline, post-intervention, and 3-month follow-up assessments, including measures of loneliness (UCLA Loneliness scale), episodic memory (Wechsler Memory Scale-III), depressive symptoms (Geriatric Depression Scale-30), and anxiety symptoms (Geriatric Anxiety Inventory). Data were analyzed on an intention-to-treat basis employing linear mixed models and mediation analyses for repeated measures. ClinicalTrials.gov identifier: NCT05499767.Results: Compared with usual care controls, the HEPPI participants reported a significant immediate decrease in total and social loneliness, but these effects were not maintained at a 3-month follow-up. The reduction in immediate perceived social loneliness significantly mediated the improvement of depressive symptoms.Conclusions: The current findings suggest that HEPPI potentially reduced total and social loneliness of the homebound older population immediately post-intervention, and such decrease in social loneliness may be a relevant mechanism for improving their short-term depressive symptomatology.