# Martingale Residuals and Schoenfeld Residuals

If the Martingale Residuals indicate that a predictor $X$ violates the proportional hazards assumption but the Schoenfeld Residuals indicate that it does not....which one should you trust?

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In reference to @andrea answer, how do you know one violates the assumption and the other does not? –  Glen Apr 13 '12 at 14:28