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The proportion of patients with significant pain relief (≥50%) and intrathecal morphine dose over the follow-up period. Error bars represent 95% CI for the mean. CI = confidence interval, IT = intrathecal; T death = 1 week before death; T dis = the time of discharge, T0 = baseline, T1 = 1 month after procedure, T3 = 3 months after procedure.
