The Journal of antimicrobial chemotherapy · 2025
Treatment success prediction in patients with methicillin-resistant coagulase-negative staphylococci infections, using vancomycin AUC24/MIC ratio: a multicentre retrospective cohort study.
СтатьяМногоцентровое исследованиеНазвание и аннотация: Перевод пока не подготовлен
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Hanai Yuki, Matsumoto Kazuaki, Endo Aiju, Hanawa Kazumi, Hashi Hideki, Miyazaki Taito, Yamaguchi Tetsuo, Harada Sohei, Yokoo Takuya, Uekusa Shusuke, Asakawa Daiki, Yokoyama Yoshiaki, Maruyama Riku, Tsujimura Shun, Namiki Takaya, Isoda Ryo, Enoki Yuki, Taguchi Kazuaki, Matsuo Kazuhiro
Аннотация
BACKGROUND: Although vancomycin is commonly used to treat methicillin-resistant coagulase-negative staphylococci (MRCoNS) infections, there are no clear guidelines for the optimal 24 h AUC24/MIC ratio. This study aimed to determine the target AUC24/MIC ratio associated with vancomycin-treated MRCoNS infection outcomes.
METHODS: This multicentre retrospective cohort study included adult patients who received vancomycin for ≥5 days for bloodstream infections caused by MRCoNS between January 2018 and December 2023. Primary outcome was treatment success, defined as a composite of survival beyond 30 days, clinical success and microbiological eradication. Secondary outcomes included 30-day mortality, clinical success, microbiological eradication and nephrotoxicity. Receiver operating characteristic (ROC) curve analysis was used to identify the AUC24/MIC cut-off for treatment success. Multivariate regression analysis was used to determine the association between AUC24/MIC and outcomes.
RESULTS: This study included 147 patients. ROC analysis identified a target AUC24/MIC ≥373 for treatment success. The overall treatment success rate (70.1%) was significantly higher in the above-average AUC24/MIC cut-off group (83.1%) than that in the below AUC24/MIC cut-off group (57.9%). Multivariate analysis confirmed that AUC24/MIC ≥373 was an independent predictor (adjusted OR = 10.227; 95% CI = 3.585-29.171). The 30-day mortality and microbiological eradication rates differed significantly between the below- and above-cut-off groups, whereas nephrotoxicity rates were comparable among the groups.
CONCLUSIONS: In treating MRCoNS infections, vancomycin AUC24/MIC ratio ≥373 was independently associated with favourable treatment outcomes. However, further prospective studies are required to confirm this target owing to the retrospective nature of this study.
METHODS: This multicentre retrospective cohort study included adult patients who received vancomycin for ≥5 days for bloodstream infections caused by MRCoNS between January 2018 and December 2023. Primary outcome was treatment success, defined as a composite of survival beyond 30 days, clinical success and microbiological eradication. Secondary outcomes included 30-day mortality, clinical success, microbiological eradication and nephrotoxicity. Receiver operating characteristic (ROC) curve analysis was used to identify the AUC24/MIC cut-off for treatment success. Multivariate regression analysis was used to determine the association between AUC24/MIC and outcomes.
RESULTS: This study included 147 patients. ROC analysis identified a target AUC24/MIC ≥373 for treatment success. The overall treatment success rate (70.1%) was significantly higher in the above-average AUC24/MIC cut-off group (83.1%) than that in the below AUC24/MIC cut-off group (57.9%). Multivariate analysis confirmed that AUC24/MIC ≥373 was an independent predictor (adjusted OR = 10.227; 95% CI = 3.585-29.171). The 30-day mortality and microbiological eradication rates differed significantly between the below- and above-cut-off groups, whereas nephrotoxicity rates were comparable among the groups.
CONCLUSIONS: In treating MRCoNS infections, vancomycin AUC24/MIC ratio ≥373 was independently associated with favourable treatment outcomes. However, further prospective studies are required to confirm this target owing to the retrospective nature of this study.