Prevalence and causes of preoperative anaemia in elective major surgery patients.

Background: Preoperative anaemia is associated with increased morbidity and mortality in surgical patients. Recent national patient blood management guideline recommended screening surgical patients for anaemia, particularly iron deficiency anaemia, without reference to the prevalence of anaemia or iron deficiency anaemia in this patient population.

Aims: To establish the prevalence and cause of preoperative anaemia in elective major surgery patients.