Prevalence and Impact of Fatigue in Children With Primary Immunodeficiency Disorders: A Quantitative Single Center Study
Abstract Although fatigue is a common symptom in adult patients with Primary Immunodeficiencies (PID), data in pediatric patients are limited. The goal of this study is to estimate the prevalence and impact of fatigue in children with PID as reported by patients, parents and health-care providers. A retrospective single center observational study was performed. Prevalence of fatigue was measured by reviewing medical charts of 54 children in our department who are on immunoglobulin substitution therapy. Both prevalence and impact were also measured by the PedsQL-Multidimensional Fatigue Scale (MFS). This comprises age-appropriate questionnaire for self-report in patients aged 5-18 years and parent proxy-reports for patients aged 2-18 years. General, cognitive, sleep-rest fatigue was measured and a total fatigue score was calculated. Means, standard deviation and Z-scores were calculated using age-specific reference values. Intraclass correlation coefficients (ICC) were calculated for comparison of scores provided by parents vs children’s self-reported scores.Both chart review data and PedsQL-MFS showed fatigue rates of 65%. Pediatric PID patients of all ages had significantly lower scores on all subscales and total score of the PedsQL-MFS compared to healthy children. General fatigue was the most affected subscale in PID patients; indicating fatigue of these patients is mainly physical. Seventy-four % of PID patients had a Z-score lower than -1 on the General fatigue subscale indicating severe fatigue. Child-parent concordance varied between 0.24 and 0.93. Our results show high prevalence and severity of fatigue in children with PID, addressing the importance of this issue in our patient care.