Association of nirmatrelvir–ritonavir with post-acute sequelae and mortality among patients who are immunocompromised with COVID-19 in Hong Kong: a retrospective cohort study
Guozhang Lin MSc , Yuchen Wei PhD , Huwen Wang MPhil , Christopher Boyer PhD , Katherine Min Jia MSc , Prof Chi Tim Hung MBBS , Xiaoting Jiang MSc , Conglu Li MSc , Carrie Ho Kwan Yam PhD , Tsz Yu Chow BSc , Yawen Wang PhD , Shi Zhao PhD , Zihao Guo MSc , Kehang Li MSc , Aimin Yang PhD , Chris Ka Pun Mok PhD , Prof David S C Hui MBBS , Ka Chun Chong PhD , Prof Eng Kiong Yeoh MBBS
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引用次数: 0
Abstract
Background
The effect of nirmatrelvir–ritonavir on post-COVID-19 outcomes for individuals who are immunocompromised is understudied. We aimed to examine the association of nirmatrelvir–ritonavir with post-acute sequelae and mortality among patients who are immunocompromised and admitted to hospital with COVID-19.
Methods
We did a retrospective cohort study using territory-wide electronic health records from the Hong Kong Hospital Authority and Hong Kong Department of Health. Eligible patients were adults aged 18 years or older who tested positive for SARS-CoV-2 during the study period (March 11, 2022, to Nov 9, 2023) and were admitted to hospital with COVID-19. Four exposure groups were formed based on immune status (immunocompromised or immunocompetent) and nirmatrelvir–ritonavir status (yes or no). The primary outcome was post-acute inpatient death, starting from 21 days after the positive RT-PCR date. Standardised mortality ratio weighting with doubly robust adjustment was applied to control for confounders. Cox models were used to estimate hazard ratios (HRs) for the outcomes.
Findings
Between March 11, 2022, and Nov 9, 2023, there were 89 772 individuals with positive RT-PCR tests, of whom 39 923 met eligibility criteria and were included in the study cohort. 19 914 (49·9%) of 39 923 patients were female, 20 009 (50·1%) were male and the median age was 75·0 years (IQR 63·0–85·0). 846 (38·2%) of 2217 patients who were immunocompromised and 14 586 (38·7%) of 37 706 patients who were immunocompetent were prescribed nirmatrelvir–ritonavir. Among the patients who were immunocompromised, those patients who received nirmatrelvir–ritonavir had significantly lower risk of post-acute inpatient death (HR 0·58, 95% CI 0·45–0·74; p<0·0001) and hospitalisation for acute respiratory distress syndrome (0·43, 0·20–0·90; p=0·024) than those who did not. A significant negative interaction was found between immune status and nirmatrelvir–ritonavir on post-acute all-cause hospitalisation (relative excess risk due to interaction –0·84, 95% CI –1·30 to –0·37; p=0·0004).
Interpretation
Nirmatrelvir–ritonavir was associated with reduced risk of post-acute inpatient death among patients who were immunocompromised and admitted to hospital with COVID-19. However, the effectiveness of nirmatrelvir–ritonavir on post-acute hospitalisation outcomes was less pronounced in patients who were immunocompromised than in patients who were immunocompetent.
Funding
Health and Medical Research Fund, Research Grants Council theme-based research schemes, and Research Grants Council Collaborative Research Fund.
期刊介绍:
The Lancet Rheumatology, an independent journal, is dedicated to publishing content relevant to rheumatology specialists worldwide. It focuses on studies that advance clinical practice, challenge existing norms, and advocate for changes in health policy. The journal covers clinical research, particularly clinical trials, expert reviews, and thought-provoking commentary on the diagnosis, classification, management, and prevention of rheumatic diseases, including arthritis, musculoskeletal disorders, connective tissue diseases, and immune system disorders. Additionally, it publishes high-quality translational studies supported by robust clinical data, prioritizing those that identify potential new therapeutic targets, advance precision medicine efforts, or directly contribute to future clinical trials.
With its strong clinical orientation, The Lancet Rheumatology serves as an independent voice for the rheumatology community, advocating strongly for the enhancement of patients' lives affected by rheumatic diseases worldwide.