Figure 4.

Emergency hospital attendance for pain management before and after commencing automated red cell exchange (responding patients only). Figures in brackets indicate number of episodes. (a): mean/patient total number of days of hospital attendance for pain managemen. (b): mean/patient visits to the emergency department (ED) or the haematology day unit (DU) for treatment with same day discharge. (c): mean/patient number of hospital admissions. (d): mean/patient total number of days of hospitalisation.