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2008 ; 30
(6
): 1135-44
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Appropriateness of antibiotic prescribing in veterans with community-acquired
pneumonia, sinusitis, or acute exacerbations of chronic bronchitis: a
cross-sectional study
#MMPMID18640469
Tobia CC
; Aspinall SL
; Good CB
; Fine MJ
; Hanlon JT
Clin Ther
2008[Jun]; 30
(6
): 1135-44
PMID18640469
show ga
BACKGROUND: Studies that have assessed antibiotic appropriateness in acute
respiratory tract infections (RTIs) with a likely bacterial etiology have focused
only on antibiotic choice and ignored other important aspects of prescribing,
such as dosing, drug-drug interactions, and duration of treatment. OBJECTIVE: The
aim of this study was to determine the prevalence and predictors of inappropriate
antibiotic prescribing practices in outpatients with acute bacterial RTIs
(community-acquired pneumonia [CAP], sinusitis, or acute exacerbations of chronic
bronchitis [AECB]). METHODS: This retrospective, cross-sectional study enrolled
outpatients with CAP, sinusitis, or AECB who were evaluated in a Veterans Affairs
emergency department over a 1-year period. Using electronic medical records,
trained research assistants completed data-collection forms that included patient
characteristics (eg, marital status, history of alcohol abuse), diagnosis,
comorbidities, concurrent medications, and antibiotics prescribed. To assess
antimicrobial appropriateness, a trained clinical pharmacist reviewed the
data-collection forms and applied a Medication Appropriateness Index (MAI), which
rated the appropriateness of a medication using 10 criteria: indication,
effectiveness, dosage, directions, practicality (defined as capability of being
used or being put into practice), drug-drug interactions, drug-disease
interactions, unnecessary duplication, duration, and expensiveness (defined as
the cost of the drug compared with other agents of similar efficacy and
tolerability). Previous studies have found good inter- and intrarater
reliabilities between a clinical pharmacist's and an internal medicine
physician's MAI ratings (kappa=0.83 and 0.92, respectively). RESULTS: One hundred
fifty-three patients were included (mean age, 58 years; 92% male; and 65% white).
Overall, 99 of 153 patients (65%) had inappropriate antibiotic prescribing as
assessed using the MAI. Expensiveness (60 patients [39%]), impracticality (32
[21%]), and incorrect dosage (15 [10%]) were the most frequently rated problem.
Penicillins, quinolones, and macrolides were the most common antibiotic classes
prescribed inappropriately. A history of alcohol abuse was associated with a
lower likelihood of inappropriate prescribing compared with no history of alcohol
abuse (adjusted odds ratio [AOR], 0.32; 95% CI, 0.10-0.98), while patients who
were married were more likely to receive inappropriately prescribed antibiotics
than those who were not married (AOR, 2.64; 95% CI, 1.25-5.59). CONCLUSIONS:
Inappropriate antibiotic prescribing based on the MAI criteria was common (65%)
in this selected patient population with acute bacterial RTIs, and often involved
problems with expensiveness (39%), impracticality (21%), and incorrect dosage
(10%). Future interventions to improve antibiotic prescribing should consider
aspects beyond choice of agent.