Predictors of change in asthma-related quality of life: a longitudinal real-life study in adult asthmatics

Purpose Asthma negatively impacts health-related quality of life (HRQL). The objective is to investigate the longitudinal relationship between HRQL in asthma and disease control, demographic and clinical objective parameters in an adult population in real-life settings. Methods We conducted a longitudinal study on adult asthmatics recruited from Liege University Hospital Asthma Clinic (Belgium) between 2011 and 2019. We selected those who had two visits and completed two patient-reported outcome measures (PROMs), the asthma control test (ACT) and the mini asthma quality of life questionnaire (AQLQ) ( n = 290). AQLQ was the dependent variable. Demographic, functional and inflammatory characteristics, asthma control, and exacerbations were the independent variables. We applied generalized linear mixed models to identify the factors associated with change in AQLQ and its dimensions. Results Median (IQR) time interval between the two visits was 7 (5–19) months. Overall, median (IQR) global AQLQ increased from 4.1 (3–5.1) to 4.6 (3.4–5.9) ( p