Changes in health-related quality of life in common variable immunodeficiency: an eight-year journey, including the COVID-19 pandemic.

Background: Personalized medicine requires the assessment of the impact of health care interventions on Health-Related Quality of Life.

Research Design And Methods: We run an observational study of HRQoL in 140 CVID patients with biannual assessments over 8  years using a disease-specific tool, the CVID_QoL, and the GHQ questionnaires. Factors influencing changes in HRQoL scores were identified using multiple linear regression models with a stepwise procedure.

Results: Infections frequency, female gender, and chronic enteropathy were associated with worse global CVID_QoL scores. The presence of permanent organ damage and older age contributed to the perception of being at risk of health deterioration, while chronic enteropathy was associated with fatigue. The presence of permanent organ damage was also associated with perceived difficulties in usual activities. The frequency of infections was the main risk factor for difficulties in long-term planning and perceptions of vulnerability. Before COVID-19, improved HRQoL scores were associated with reduced respiratory infections and changes in immunoglobulin replacement route and setting. The COVID-19 pandemic caused a sudden deterioration in all HRQoL dimensions, and a further deterioration in the emotional dimension was observed during the pandemic period. Patients who died during the study had worse CVID_QoL scores at all time points, confirming that HRQoL performance is strongly related to patient outcome.

Conclusions: Periodic HRQoL assessments are needed to capture relevant issues that change over time in patients affected by long-term chronic conditions such CVID, possibly identifying areas of intervention.