Evaluation of clinical trial designs for novel anticancer drugs in China: a cohort study of drugs approved between 2015 and 2021

Comparative Assessment of Pivotal Trials Supporting the Indication Approvals of Innovative and Modified New Anticancer Drugs in China, 2016-2022

Background: Since the launch of drug regulatory reform in 2015, China has substantially increased the availability of new cancer therapies. However, the efficacy evidence criteria for modified new anticancer drugs have not been evaluated. This cross-sectional study aimed to assess the pivotal trials supporting the indication approvals of innovative and modified new chemical anticancer drugs in China. Methods: The characteristics of indications, regulatory aspects, and pivotal trial designs were extracted and described. The primary efficacy endpoints of the pivotal clinical trials, including overall survival (OS) and progression-free survival (PFS), were quantitatively assessed by meta-analysis. Results: Between 2016 and 2022, 77 cancer therapeutics for 107 indications were approved in China based on 128 pivotal trials. Among the 107 indications, 64 (59.8%) were classified as innovative anticancer drugs, and 43 (40.2%) as modified new anticancer drugs. The study found that pivotal trials for innovative approvals tended to be single-arm trials, while modified approvals were more likely to employ randomized clinical trials with larger sample sizes and rigorous designs. Despite innovative drugs often receiving more expedited regulatory designations, there were no statistically significant differences in clinical benefit of OS or PFS outcomes between innovative and modified approvals. Conclusions: These results suggest that the current regulatory framework may prioritize the speed of approval for innovative drugs over the strength of supporting evidence. These findings align with the strategic trends of pharmaceutical companies and regulatory inclinations that aim to expedite the approval of innovative anticancer drugs with a high unmet need, thereby accelerating patients' accessibility to treatment.

Evaluation of the implementation effectiveness of accelerated drug marketing registration procedures in China: lessons from the 2016-2024 regulatory review

China has implemented accelerated drug marketing registration procedures (ADMRPs) since 2016, including priority review and approval (PRA), conditional approval (CA), and breakthrough therapy drugs (BTDs). This study analyzed the characteristics of drugs approved by ADMRPs from 2016 to 2024 and explored the implementation effectiveness of these procedures. Overall, 922 drugs were approved for marketing through five ADMRPs (or procedure combinations): PRA (759, 82.3%), CA (12, 1.3%), CA + PRA (108, 11.7%), BTD + PRA (23, 2.5%), and BTD + CA + PRA (20, 2.2%). Drugs approved through the different procedures differed widely in terms of drug attributes and clinical uses, clinical trial design, and drug registration and marketing. Implementing ADMRPs has demonstrated excellent results in accelerating the development and marketing of clinically value-driven drugs.

Assessment of the implementation of accelerated drug marketing registration procedures for antineoplastic and immunomodulating agents in China: based on 2016-2022 review data

Objective

Since 2016, China has successively implemented Accelerated Drug Marketing Registration Procedures (ADMRPs) for drugs, including Breakthrough Therapy Drug (BTD), Conditional Approval (CA), and Priority Review and Approval (PRA), which have played an important role in promoting the development and review of clinically urgently needed drugs. In this study, we focused on the antineoplastic and immunomodulating agents approved for marketing through ADMRPs, to provide a reference for promoting the formation of a stable and mature regulatory system for the review and approval of antineoplastic drugs and immunomodulating agents in China.

Methods

Reviewed the National Medical Products Administration (NMPA) drug review reports for the years 2016-2022 and screened the antineoplastic and immunomodulating agents approved through ADMRPs. Then, with the help of the NMPA website and the Yaozhi Database, two researchers independently queried and entered the detailed information of the selected drugs, and checked with each other. The attribute classification and main characteristics of the drugs were then analyzed with descriptive statistics to obtain the trend of drug types, drug review and approval status, and timeliness.

Results

A total of 206 antineoplastic and immunomodulating agents were approved for marketing through five accelerated marketing registration procedures (or procedure combinations), with the average review time shortened by about 81 days. Among them, imported drugs accounted for a larger proportion, the most drugs for treating non-small cell lung cancer and lymphoma, and the largest number of PD-1/PDL-1 inhibitors, but pediatric drugs and rare disease drugs accounted for a smaller proportion.

Conclusion

ADMRPs can promote the accessibility of antineoplastic and immunomodulating agents in China and safeguard the life and health rights of more patients. Nevertheless, it is necessary to pay attention to the expansion of the types of indications for medicines and to increase the development of drugs that are urgently needed by a small number of patients.

Review time of oncology drugs and its underlying factors: an exploration in China

Introduction: How the launch delay of drugs and other factors of interest can influence the length of the review period by drug agencies is still unknown, and understanding this can help better strike the trade-off related to review speed. Methods: We included all new oncology drug applications submitted to China's National Medical Product Administration (NMPA) between 1 January 2018 and 31 December 2021, and ultimately succeeded in achieving marketing approval. For each drug, the length of the NMPA review process and other major characteristics were collected, including the registration class, approval class, priority review designation, and launch delay relative to the United States, as well as the number of patients enrolled, comparator, and primary endpoint of the pivotal trials supporting the approval. Linear regression model was employed to analyze the effects of factors of interest on the NMPA review time. Results: From 2018 to 2021, NMPA received 137 oncology applications that were ultimately approved. Half of the approvals [76 (55.5%)] were first licensed in the US, leaving a median launch delay of 2.71 years (IQR, 1.03-5.59) in China. In the pivotal studies, the median enrollment was 361 participants (IQR, 131-682), and the use of control groups [90 (65.7%)] and surrogate endpoints [101 (73.7%)] was prevalent. The median review time was 304 days (IQR, 253-376). Multivariate analysis for log-transformed review time showed that larger enrollment (> 92) was associated with a drop of 20.55% in review time (coefficient = -0.230; 95% CI, -0.404 to -0.055; p = 0.010); and a short delay (0 < delay ≤ 1.95 years) was associated with a drop of 17.63% in review time (coefficient = -0.194; 95% CI, -0.325 to -0.062; p = 0.004). Discussion: The short launch delay relative to the US was one important driver to the review speed of NMPA, which might suggest its latent regulatory reliance on the other global regulator during the post-marketing period when new information on the drug's clinical benefit was still lacking.