Health-related quality of life in immunocompromised adults with mild–moderate COVID-19 treated with nirmatrelvir-ritonavir: results from the randomized, double-blinded EPIC-IC trial
et al., Health and Quality of Life Outcomes, doi:10.1186/s12955-026-02518-8, EPIC-IC, NCT05438602, Mar 2026
RCT 150 immunocompromised adults with mild-to-moderate COVID-19 comparing 5, 10, or 15 days of nirmatrelvir/ritonavir. There was no control group. No dose-response relationship was observed: HRQoL recovery patterns were statistically indistinguishable across the three treatment durations in the overall sample and in both severe and non-severe immunocompromised subgroups. The single nominally significant finding - higher day 10 physical health scores in the 10-day versus 5-day arm among severely immunocompromised participants arose from a small, post hoc subgroup analysis with notable baseline imbalances between arms, and the absence of any further improvement in the 15-day arm argues against a genuine treatment effect.
Mokgokong et al., 19 Mar 2026, Double Blind Randomized Controlled Trial, multiple countries, peer-reviewed, 5 authors, study period 3 August, 2022 - 13 November, 2023, trial NCT05438602 (history) (EPIC-IC).
Contact: ruth.mokgokong@pfizer.com.
Health-related quality of life in immunocompromised adults with mild–moderate COVID-19 treated with nirmatrelvir-ritonavir: results from the randomized, double-blinded EPIC-IC trial
Health and Quality of Life Outcomes, doi:10.1186/s12955-026-02518-8
Background: Little is known about health-related quality of life (HRQoL) in immunocompromised people during and after COVID-19 illness. We describe HRQoL outcomes from the EPIC-IC trial, which included participants with immunocompromise and mild-moderate COVID-19. Methods: EPIC-IC was a randomized, double-blind trial. Participants were assigned 1:1:1 to 5-day, 10-day, or 15-day nirmatrelvir-ritonavir (NMV/r) and completed the SF-36 and EQ-5D-5L through Week (W)24. HRQoL was analyzed across and by treatment arms for the evaluable population (N=150) and in post hoc subpopulations with severe (n=57) and non-severe (n=93) immunocompromise. Mixed-effects longitudinal models compared 5-day vs. 10-day or 15-day NMV/r.
Results: In the overall sample, mean baseline SF-36 domain scores (norm-based; mean=50, SD=10) ranged from 35.7-44.1, mean Physical Component Summary (PCS) score was 37.9, and mean Mental Component Summary (MCS) score was 41.5 -all substantially worse than cancer comparator norms and age-matched general population (AMGP) norms. Baseline mean EQ-5D-5L Index score was 0.65; participants reported problems with pain/discomfort (90% of participants), usual activities (73%), mobility (50%), anxiety/depression (48%), and self-care (29%). These proportions improved through Day (D)15 (change from baseline [CFB]: -49%points for pain/discomfort, -38%-points usual activities, -22%-points mobility, -24%points anxiety/depression, -19%-points self-care) and then stabilized. From the earliest post-baseline assessment (EQ-5D-5L: D5, SF-36: D10), all overall-sample outcomes improved significantly (p<0.05), with all mean improvements exceeding published minimum important difference thresholds (SF-36: 2-4-point; EQ-5D-5L
SF-36 completion and outcomes The SF-36 was completed by 51% of participants at baseline and by 83-90% of participants across post-baseline timepoints (Supplementary Table 1 ; Supplementary results).
SF-36 domain scores
Overall sample For all domains, baseline scores appeared to be similar across treatment arms (Supplementary Figure 1 ; Supplementary Tables 2 3 4 5 6 7 8 9 ). Across arms, mean baseline domain scores were lowest (i.e., indicating worse HRQoL) in Social Functioning (35.7 , norm-based with a mean of 50 and SD of 10) and Role-Physical (35.7) domains and highest in the Mental Health (44.1) domain (Supplementary Tables 2 3 4 5 6 7 8 9 ). For each domain, mean baseline scores in the overall sample were substantially lower (i.e., worse) than US general population norm scores for ages 55-64 [24] , population norm scores for ages 55-64 provided in the SF-36 User Manual [26] , and comparator scores for people with cancer (all cancers except skin cancer) [26] . Post-baseline improvements in the 5-day arm generally appeared similar to those in 10-day and 15-day arms (Supplementary Figure 1 ; Supplementary Tables 2 3 4 5 6 7 8 9 ). Consequently, scores are summarized below across treatment arms. For all domains, scores were significantly improved from baseline at each postbaseline visit (all p<0.05; Figure 3 ; Supplementary Tables 2 3 4 5 6 7 8 9 ). Mean improvements at each post-baseline visit were numerically greater than published MID values
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