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The 24-hour PCA evaluation and morphine consumption. A, VAS pain score at rest at different time points in the 2 groups (∗P < 0.05). B, VAS pain score on movement at different time points in the 2 groups (∗P < 0.05). C and D, The pump-press numbers and morphine consumption during the first 24 hours after surgery are shown (∗P < 0.05).
