Smoking status also showed a positive trend across models, but the lack of statistical significance may reflect insufficient data, inter‐study variability or residual confounding.
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Prognostic Impact of Anterior Commissure Involvement on Treatment Failure in Early-Stage Glottic Carcinoma Treated With Definitive Radiotherapy: A Univariate and Multivariate Meta-Analysis.
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The sentences
Smoking status also showed a trend for increased risk, but all CrIs included zero, reflecting insufficient evidence for a definitive association.