Determinants of quality of life among people with dementia: evidence from a South Asian population

BACKGROUND: Dementia has become a public health priority along with population aging worldwide. Owing to its chronic progressive nature in the absence of a cure, maintaining the best possible quality of life (QOL) has become the desired outcome for people with dementia (PWD). AIM: The current study aimed to determine the factors associated with ‘good QOL’ in people with dementia in the Sri Lankan setting. METHODS: An unmatched case–control study was conducted to identify the factors associated with ‘good QoL. Cases in the study included dementia patients having ‘good’ QOL, whereas controls were those having ‘poor’ or ‘average’ QOL. Both cases and controls were selected from the same patient base at a premier tertiary care state hospital in Colombo District, Sri Lanka. They were identified using the validated DEMQOL (Dementia Specific Quality of Life) tool, adhering to strict eligibility criteria. An interviewer-administered questionnaire was used to assess the associated factors. Bivariate analysis followed by logistic regression modelling determined the associated factors for ‘good QOL’ adjusted for confounders using odds ratio (OR) and 95% confidence interval (CI). RESULTS: The study sample consisted of 64 cases and 208 controls. After adjusting for confounders, education up to GCE O/Level and above (OR = 4.02; 95% CI = 2.97, 12.0), ever employed (OR = 3.21; 95% CI = 1.59, 11.06), good social functioning (OR = 4.14; 95% CI = 3.39, 16.46), mild functional impairment (OR = 1.77; 95% CI = 1.13, 9.67), little or no caregiver burden (OR = 2.96; 95% CI = 1.86, 10.94), absence of apathy (OR = 2.22; 95% CI = 1.27, 12.48) and absence of irritability (OR = 2.17; 95% CI = 1.72, 10.34) were found to be significantly associated with ‘good QOL’. 60% of the variance of ‘good’ QOL among PWD was explained by the factors in the final model. CONCLUSIONS AND RECOMMENDATIONS: The identified determinants of ‘good QOL’ clearly show how the QOL improvement interventions need to be planned. Accordingly, such programmes should be primarily focused on strategies to improve PWDs' ADL (Activities of Daily living), reduce and manage neuropsychiatric symptoms effectively and to promote activities enhancing social functioning, and plan programmes to address caregiver burden. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12877-022-03443-3.