ReviewCancer cell international2025
PD-L1 has a stronger effect on increasing headache risk than PD-1: a systematic review and meta-analysis.
Review in Cancer cell international, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
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Authors and funding
9 authors.
Funding
Abstract
purposeThis meta-analysis aimed to clarify the risk of headaches caused by programmed cell death 1 (PD-1) and programmed cell death ligand 1 (PD-L1) inhibitors.
methodRelevant clinical trials were screened using PubMed. The risk of headache associated with PD-1 or PD-L1 inhibitors was calculated using the mirror principle and PRISMA guidelines.
resultsA total of 33 clinical trials were screened for this comprehensive meta-analysis, yielding nine mirror-pairing groups. The risk of headache with PD-1 or PD-L1 inhibitors was significantly higher than that with placebo (OR = 1.48, 95% CI: [1.06, 2.06], Z = 2.33, P = 0.02) and similar to that with chemotherapy drugs (OR = 1.06, 95% CI: [0.84, 1.34], Z = 0.49, P = 0.62). When PD-1 or PD-L1 inhibitors are combined with other immune-related drugs, the risk of headaches increases to varying degrees. However, when combined with chemotherapy, this risk did not increase significantly (OR = 1.02, 95% CI: [0.78, 1.32], Z = 0.11, P = 0.91). Compared with PD-1, PD-L1 inhibitors were associated with a higher headache risk (OR = 1.39, 95% CI: [0.64, 2.12], Z = 1.51, P = 0.13).
conclusionPD-L1 has a stronger effect on increasing headache risk than PD-1. Similar to the comparison of PD-1 or PD-L1 versus chemotherapy, PD-1 or PD-L1 plus chemotherapy did not significantly increase headache risk.
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