In Regard to Bibault et al

To the Editor: We read with great interest the article "Clinical outcomes of several IMRT techniques for patients with head and neck cancer: A propensity score-weighted analysis" (1) and felt uncomfortable with some methodologic issues and the conclusion they support. First, the absence of randomization is a major drawback. Though a propensity score–weighted analysis was performed to minimize the biases of the patients population, it does not correct the potential biases linked to the physicians and the centers.

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