Abstract
IntroductionMaintenance dialysis patients (MDP) are at higher risk of exposure with increased mortality from COVID‐19 with generalized immunization becoming the cornerstone in prevention. This study aims to compare humoral response between hemodialysis (HD) and peritoneal dialysis (PD) patients.Materials and MethodsObservational prospective study following HD and PD programs from a Portuguese Center receiving BNT162b2 vaccine. Specific anti‐Spike IgG quantification to compare both for absolute value and non‐responders (NR) between modalities and against risk factors.ResultsOf 67 MDP, 42 were HD and 25 PD patients. PD developed higher antibody titers after both first (median 5.44 vs. 0.99 AU/ml, p < 0.01) and second dose (median 170.43 vs. 65.81 AU/ml; p < 0.01). HD associated with NR after the first dose (p < 0.01).ConclusionThis study demonstrated improved humoral immunogenicity with BNT162b2 in PD compared to HD patients. These differences are attributed to comorbidity burden and age differences, rather than dialysis modality.
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