Abstract：
BACKGROUND AND OBJECTIVE:To include a specific antibiotic in the empiric therapy, it is necessary to predict when a nosocomial pneumonia (NP) is caused by methicillin-resistant Staphylococcus aureus (MRSA). We have developed a model for the prediction of the probability of a NP being caused by MRSA, when the carrier status and the microbiological diagnosis are unknown. PATIENTS AND METHODS:A retrospective case-control study (1999-2005) was designed. A univariate and multivariate logistic regression was performed to identify the risk factors for suffering a NP due to MRSA. Demographic factors, related to hospitalization, immunosuppression or neutropenia, to medication and severity were included. RESULTS:Three hundred and sixty three patients (121 cases and 242 controls) were studied. The final model of multivariate logistic regression included an age>14 years (OR 7.4, CI 95% 1.5-37.4, P<.015), NP appearance>6 days after admittance (OR 4.1, CI 95% 2.4-7,1, P<.001), NP development excluding summers (OR 2.5, CI 95% 1.2-5.2, P<.015), respiratory diseases (OR 4.9, CI 95% 1.5-15.8, P<.007) and multilobar involvement (OR 4, CI 95% 2.3-7.2, P<.001).The probability of developing a pneumonia due to MRSA was studied for each of the possible combinations and subsequently classified in minor and major criteria. CONCLUSIONS:MRSA coverage should be included in the empirical treatment of NP when: a) an adult patient (>14 years old) presents, at least, 2 major criteria or 1 major criterion together with 2 minor criteria, and b) a patient <14 years-old has 2 major criteria as well as 2 minor criteria.
journal_name
Med Clin (Barc)journal_title
Medicina clinicaauthors
Torre-Cisneros J,Tejero García R,Natera Kindelán C,Font Ugalde P,Franco Álvarez de Luna F,Castón Osorio JJ,Rivero Román A,Casal Román Mdoi
10.1016/j.medcli.2011.05.028subject
Has Abstractpub_date
2012-02-18 00:00:00pages
99-106issue
3eissn
0025-7753issn
1578-8989pii
S0025-7753(11)00915-8journal_volume
138pub_type
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