Abstract
To estimate the risk of death from healthcare-associated (nosocomial) bacteraemia caused by methicillin-resistant Staphylococcus aureus (MRSA), and compare it with that of nosocomial bacteraemia caused by methicillin-sensitive S. aureus (MSSA), by meta-analysis of selected studies. Medline, EMBASE, Current Contents and Cochrane Library were searched for the period January 1978 (or earliest date of the database, if later than 1978) to December 2000. Studies which compared mortality of nosocomial MRSA and MSSA bacteraemia. Nine studies were analysed. All but one found an increased relative risk (RR) of death from MRSA bacteraemia, with RR ranging from 0.89 to 4.94. Meta-analysis showed that patients with MRSA bacteraemia have an RR of death, compared with patients with MSSA bacteraemia, of 2.12 (95% CI, 1.76-2.57) using the fixed-effect method, and 2.03 (95% CI, 1.55-2.65) using the random-effect method. MRSA bacteraemia is associated with a real increase in risk of death, further justifying ongoing MRSA surveillance and control in healthcare facilities.
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