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Updated: May 8, 2026
Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)
Published on: February 9, 2011
[Comparing results of methicillin-resistant Staphylococcus aureus (MRSA) surveillance using the French DRG-based
1Service de biostatistique et d'informatique médicale, CHU de Dijon, CHRU, 21000 Dijon, France.
Background:
The surveillance of methicillin-resistant Staphylococcus aureus (MRSA) is a national priority. The rate of MRSA infections is one of six indicators tracked by the Department of Health. Since 2002, the French institute for public health surveillance (InVS) has monitored MRSA infections to estimate incidence density. Today, the use of the French administrative database (PMSI) could facilitate this surveillance. The aim of this study was to compare MRSA incidence density computed at a national level using PMSI databases with the results from the InVS taken as the reference.
Methods:
PMSI databases for the years 2006 to 2009 were used. The reference results were those published by the InVS from 2006 to 2009. MRSA density defined as the number of MRSA infections recorded per year over 1000 hospital stays was computed. It was then compared with the MRSA incidence density measured by InVS. The time course of MRSA incidence in the PMSI records was modeled using a Poisson regression.
Results:
The incidence density measured by the InVS was higher than the MRSA density computed using the PMSI, but this difference appeared to decrease over time. The PMSI density/InVS MRSA incidence density ratio was 0.8% in 2006 and about 9.2% in 2009. We observed inverted trends with a growing trend in MRSA density identified by the PMSI. Furthermore, the year of study was significantly associated with incidence density (P=0.01).
Conclusion:
Using PMSI data as an additional source of information in the hospital MRSA surveillance process makes it possible to detect and analyze patient repeats at the regional and national levels with linkage facilities. Estimation of incidence density for hospitals not participating to this surveillance system will be the next step.
Insights
Hospital surveillance of methicillin-resistant Staphylococcus aureus (MRSA) using French administrative databases (PMSI) shows promising results. PMSI data increasingly aligns with national surveillance, aiding MRSA infection tracking.
Area of Science:
- Public Health
- Infectious Disease Epidemiology
- Health Informatics
Background:
- Methicillin-resistant Staphylococcus aureus (MRSA) surveillance is a national health priority.
- The French Institute for Public Health Surveillance (InVS) has monitored MRSA infections since 2002.
- French administrative databases (PMSI) offer potential for enhanced MRSA surveillance.
Purpose of the Study:
- To compare MRSA incidence density calculated using PMSI databases with InVS reference data.
- To evaluate the feasibility of using PMSI data for national MRSA surveillance.
Main Methods:
- Utilized PMSI databases from 2006-2009.
- Calculated MRSA density per 1000 hospital stays.
- Compared PMSI-derived density with InVS incidence density.
- Employed Poisson regression to model MRSA incidence trends in PMSI records.
Main Results:
- InVS-measured incidence density was initially higher than PMSI-computed density.
- The disparity between PMSI and InVS data decreased from 2006 to 2009.
- PMSI data revealed an increasing trend in MRSA density, contrasting with InVS data.
- Study year significantly correlated with incidence density (P=0.01).
Conclusions:
- PMSI data can supplement hospital MRSA surveillance, enabling patient repeat analysis.
- PMSI facilitates regional and national MRSA tracking.
- Future work includes estimating incidence density for non-participating hospitals.
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