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Assessment of the Value of Repeated Point-Prevalence Surveys for Analyzing the Trend in Nosocomial Infections

Published online by Cambridge University Press:  21 June 2016

Catherine Sartor ,
Anne Delchambre ,
Laurence Pascal ,
Michel Drancourt ,
Philippe De Micco  and
Roland Sambuc
Catherine Sartor*
Affiliation:
Comité de Lutte contre les Infections Nosocomiales, Hôpital de la Conception, Assistance Publique-Hôpitaux de Marseille, Marseille, France
Anne Delchambre
Affiliation:
Comité de Lutte contre les Infections Nosocomiales, Hôpital de la Conception, Assistance Publique-Hôpitaux de Marseille, Marseille, France
Laurence Pascal
Affiliation:
Département d'Information Médicale, Hôpital de la Conception, Assistance Publique-Hôpitaux de Marseille, Marseille, France
Michel Drancourt
Affiliation:
Comité de Lutte contre les Infections Nosocomiales, Hôpital de la Conception, Assistance Publique-Hôpitaux de Marseille, Marseille, France
Philippe De Micco
Affiliation:
Laboratoire de Virologie, Hôpital de la Conception, Assistance Publique-Hôpitaux de Marseille, Marseille, France
Roland Sambuc
Affiliation:
Département d'Information Médicale, Hôpital de la Conception, Assistance Publique-Hôpitaux de Marseille, Marseille, France
*
Comité de Lutte contre les Infections Nosocomiales, Hôpital de la Conception, 147 bvd Baille, 13385 Marseille cedex 5, France, catherine.sartor@ap-hm.fr
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Abstract

Objective:

To assess the value of repeated point-prevalence surveys in measuring the trend in nosocomial infections after adjustment for case mix.

Setting:

A 3,500-bed teaching facility composed of 4 acute care hospitals.

Methods:

From May 1992 to June 1996, eight point-prevalence surveys of nosocomial infections were performed in the hospitals using a sampling process. The trend of adjusted nosocomial infection rates was studied for the four surveys that collected data on indwelling catheters. Adjusted rates were calculated using a logistic regression model and a direct standardization method.

Results:

From 1992 to 1996, a total of 20,238 patients were included in the 8 point-prevalence surveys. The nosocomial infection rate decreased from 8.6% in 1992 to 5% in 1996 (P < .001). The analysis of adjusted nosocomial infection rates included 9,600 patients. Four independent risk factors were identified; length of stay greater than 12 days, hospitalization in an intensive care unit, presence of an indwelling urinary catheter, and history of a surgical procedure. After adjustment for case mix, the nosocomial infection rate still showed a downward trend (from 7.2% in 1993 to 5.1% in 1996; P = .02).

Conclusion:

Adjusted prevalence rates of nosocomial infections showed a significant downward trend during the period of this study.

Type
Orginal Articles
Information
Infection Control & Hospital Epidemiology , Volume 26 , Issue 4 , April 2005 , pp. 369 - 373
Copyright
Copyright © The Society for Healthcare Epidemiology of America 2005

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