Correction: Penati et al. High Outcome-Reporting Bias in Randomized-Controlled Trials of Acupuncture for Cancer Chemotherapy-Induced Nausea and Vomiting: A Systematic Review and Meta-Epidemiological Study. Curr. Oncol. 2025, 32, 462.

If you or a loved one is going through cancer treatment, you may have heard that acupuncture can help with the nausea and vomiting that often come with chemotherapy. These side effects can be exhausting and make an already difficult time even harder, so finding effective relief is incredibly important.

A team of researchers took a careful look at the existing scientific studies on acupuncture for chemotherapy-induced nausea and vomiting. Rather than running a new clinical trial, they reviewed a collection of previously published randomized controlled trials — the gold standard of medical research — to see how trustworthy those studies really were. What they found was concerning: a high proportion of those trials showed something called "outcome-reporting bias." This means that researchers may have selectively reported only the results that looked favorable, while leaving out findings that were less impressive or neutral.

Why does this matter to you? When studies only publish positive results, it can make a treatment look more effective than it truly is. This doesn't necessarily mean acupuncture doesn't help with chemotherapy side effects — many patients do report meaningful relief. But it does mean we need better, more transparent research before we can say with confidence exactly how well it works and for whom.

The good news is that researchers are actively working to improve the quality of acupuncture studies, and this kind of critical review is an important step toward getting clearer answers. In the meantime, if you are considering acupuncture as part of your cancer care, talk openly with your oncology team about integrating it safely into your treatment plan.

Always seek care from a licensed, board-certified acupuncturist who has experience working with oncology patients.

This systematic review and meta-epidemiological study by Penati et al., published in Current Oncology, examined the prevalence of outcome-reporting bias (ORB) across randomized controlled trials (RCTs) evaluating acupuncture for chemotherapy-induced nausea and vomiting (CINV). The authors identified a high degree of ORB within the included RCTs, suggesting that selectively reported outcomes may be systematically inflating the apparent efficacy of acupuncture for CINV in the published literature. This meta-epidemiological methodology is specifically designed to detect discrepancies between pre-registered or protocol-defined outcomes and those ultimately reported in publications. Clinically, these findings urge caution when interpreting the existing evidence base supporting acupuncture for CINV. Practitioners should critically appraise individual studies for protocol registration and outcome consistency before applying findings to patient care. More rigorously designed and transparently reported trials are needed to establish reliable effect sizes and inform evidence-based integration of acupuncture into oncology supportive care protocols. Note: this citation refers to a correction regarding an author affiliation, not a change in findings.