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The Influence of the Composition of the Nursing Staff on Primary Bloodstream Infection Rates in a Surgical Intensive Care Unit
Jérôme Robert , MD, MPH, Scott K. Fridkin , MD, Henry M. Blumberg , MD, Betsy Anderson , RN, Nancy White , RN, Susan M. Ray , MD, Jinlene Chan , MSc and William R. Jarvis , MD
Infection Control and Hospital Epidemiology
Vol. 21, No. 1 (January 2000), pp. 12-17
Published by: Cambridge University Press on behalf of The Society for Healthcare Epidemiology of America
Stable URL: http://www.jstor.org/stable/10.1086/501690
Page Count: 6
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OBJECTIVES. To determine the risk factors for acquisition of nosocomial primary bloodstream infections (BSIs), including the effect of nursing‐staff levels, in surgical intensive care unit (SICU) patients. DESIGN. A nested case‐control study. SETTING . A 20‐bed SICU in a 1,000‐bed inner‐city public hospital. PATIENTS. 28 patients with BSI (case‐patients) were compared to 99 randomly selected patients (controls) hospitalized >3 days in the same unit. RESULTS. Case‐ and control‐patients were similar in age, severity of illness, and type of central venous catheter (CVC) used. Case‐patients were significantly more likely than controls to be hospitalized during a 5‐month period that had lower regular‐nurse–to–patient and higher pool‐nurse–to–patient ratios than during an 8‐month reference period; to be in the SICU for a longer period of time; to be mechanically ventilated longer; to receive more antimicrobials and total parenteral nutrition; to have more CVC days; or to die. Case‐patients had significantly lower regular‐nurse–to–patient and higher poolnurse–to–patient ratios for the 3 days before BSI than controls. In multivariate analyses, admission during a period of higher pool‐nurse–to–patient ratio (odds ratio [OR]=3.8), total parenteral nutrition (OR=1.3), and CVC days (OR=1.1) remained independent BSI risk factors. CONCLUSIONS. Our data suggest that, in addition to other factors, nurse staffing composition (ie, pool‐nurse–to–patient ratio) may be related to primary BSI risk. Patterns in intensive care unit nurse staffing should be monitored to assess their impact on nosocomial infection rates. This may be particularly important in an era of cost containment and healthcare reform.
© 2000 by The Society for Healthcare Epidemiology of America. All rights reserved.