Volume 1, Issue 4 pp. 293-304
META-ANALYSIS
Open Access

Deaths and adverse events from adjuvant therapy with immune checkpoint inhibitors in solid malignant tumors: A systematic review and network meta-analysis

Ruiyang Xie

Ruiyang Xie

Department of Urology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China

Contribution: Data curation (equal), Formal analysis (equal)

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Jie Wu

Jie Wu

Department of Urology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China

Contribution: Data curation (equal), Formal analysis (equal)

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Bingqing Shang

Bingqing Shang

Department of Urology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China

Contribution: ​Investigation (equal), Methodology (equal)

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Xingang Bi

Xingang Bi

Department of Urology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China

Contribution: Funding acquisition (equal), ​Investigation (equal)

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Chuanzhen Cao

Chuanzhen Cao

Department of Urology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China

Contribution: Conceptualization (equal), Methodology (equal)

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Youyan Guan

Corresponding Author

Youyan Guan

Department of Urology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China

Correspondence Youyan Guan, Hongzhe Shi, and Jianzhong Shou, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Panjiayuan Nanli #17, Chaoyang District, Beijing 100021, China.

Email: [email protected], [email protected] and [email protected]

Contribution: ​Investigation (equal), Project administration (equal)

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Hongzhe Shi

Corresponding Author

Hongzhe Shi

Department of Urology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China

Correspondence Youyan Guan, Hongzhe Shi, and Jianzhong Shou, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Panjiayuan Nanli #17, Chaoyang District, Beijing 100021, China.

Email: [email protected], [email protected] and [email protected]

Contribution: Funding acquisition (equal), ​Investigation (equal)

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Jianzhong Shou

Corresponding Author

Jianzhong Shou

Department of Urology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China

Correspondence Youyan Guan, Hongzhe Shi, and Jianzhong Shou, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Panjiayuan Nanli #17, Chaoyang District, Beijing 100021, China.

Email: [email protected], [email protected] and [email protected]

Contribution: Project administration (lead)

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First published: 14 November 2022

Ruiyang Xie and Jie Wu contributed equally to this study.

Abstract

Background

By prolonging overall survival and reducing disease recurrence rates, immune checkpoint inhibitors (ICIs) are an emerging adjuvant therapy option for patients with resectable malignant tumors. However, the safety profile (deaths and adverse events [AEs]) of adjuvant ICIs has not been fully described.

Methods

We searched the literature for phase III randomized clinical trials that compared PD-1, PD-L1, and CTLA-4 inhibitors in solid malignant tumors. Incidences of death, discontinuation, AEs of any cause, treatment-related adverse events (TRAEs), and immune-related adverse events (IRAEs) were extracted for the network meta-analysis. Network meta-analyses with low incidence and poor convergence are reported as incidences with 95% confidence intervals (95% CIs).

Results

Ten randomized clinical trials that included 9243 patients who received ICI adjuvant therapy were eligible. In total, 21 deaths due to TRAEs were recorded, with an overall incidence of 0.40% (95% CI: 0.26–0.61). The treatment-related mortality rates for ipilimumab (0.76%, 95% CI: 0.31–1.55) and atezolizumab (0.56%, 95% CI: 0.18–1.31) were higher than for pembrolizumab (0.24%, 95% CI: 0.10–0.56) and nivolumab (0.30%, 95% CI: 0.08–0.77). The most frequent causes of death were associated with the gastrointestinal (0.10%, 95% CI: 0.04–0.24) and pulmonary (0.08%, 95% CI: 0.03–0.21) systems. Compared with the control arm, we found that nivolumab (odds ratio [OR]: 2.73, 95% CI: 0.49–15.85) and atezolizumab (OR: 12.43, 95% CI: 2.42–78.48) caused the fewest grade ≥3 TRAEs and IRAEs. Commonly reported IRAEs of special interest were analyzed, and two agents were found to have IRAEs with incidences >10%, i.e., hepatitis for atezolizumab (14.80%, 95% CI: 12.53–17.32) and hypophysitis for ipilimumab (13.53%, 95% CI: 11.38–15.90).

Conclusions

Ipilimumab and atezolizumab were correlated with higher treatment-related death rates than pembrolizumab and nivolumab, in which the gastrointestinal and pulmonary systems were mostly involved. Regarding severe TRAEs and IRAEs, nivolumab and atezolizumab are likely to be the safest agent, respectively. This study will guide clinical practice for ICI adjuvant therapies.

CONFLICT OF INTEREST

The authors declare no conflict of interest.

DATA AVAILABILITY STATEMENT

The datasets supporting the conclusions of this article are included within the article and its additional file.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.