Fig. 1. Comparison of the visual analog pain score (VAS, mean ± SD) in young (n = 224) and elderly (n = 105) patients. VAS corresponds to the maximum value recorded just before morphine administration (IV = intravenous; SC = subcutaneous, every 4 h, from 1 to 6). End = end of morphine titration; Ons = onset of morphine titration. P  values refer to between-groups comparison. NS = not significant.

Fig. 1. Comparison of the visual analog pain score (VAS, mean ± SD) in young (n = 224) and elderly (n = 105) patients. VAS corresponds to the maximum value recorded just before morphine administration (IV = intravenous; SC = subcutaneous, every 4 h, from 1 to 6). End = end of morphine titration; Ons = onset of morphine titration. P  values refer to between-groups comparison. NS = not significant.

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