Combination Versus Monotherapy for Carbapenem-Resistant Acinetobacter Species Serious Infections: A Prospective IPTW Adjusted Cohort Study
Issued Date
2024-01-01
Resource Type
ISSN
21938229
eISSN
21936382
Scopus ID
2-s2.0-85204804608
Journal Title
Infectious Diseases and Therapy
Rights Holder(s)
SCOPUS
Bibliographic Citation
Infectious Diseases and Therapy (2024)
Suggested Citation
Manesh A., George M.M., Palanikumar P., Nagaraj V., Bhanuprasad K., Krishnan R., Nivetha G., Lal B., Triveni K.R., Gautam P., George B., Kulkarni U., Mathews V., Subramani K., Rao S., Chacko B., Zachariah A., Sathyendra S., Hansdak S.G., Abraham O.C., Iyadurai R., Karthik R., Peter J.V., Mo Y., Veeraraghavan B., Varghese G.M., Paterson D.L. Combination Versus Monotherapy for Carbapenem-Resistant Acinetobacter Species Serious Infections: A Prospective IPTW Adjusted Cohort Study. Infectious Diseases and Therapy (2024). doi:10.1007/s40121-024-01042-w Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/101435
Title
Combination Versus Monotherapy for Carbapenem-Resistant Acinetobacter Species Serious Infections: A Prospective IPTW Adjusted Cohort Study
Author(s)
Manesh A.
George M.M.
Palanikumar P.
Nagaraj V.
Bhanuprasad K.
Krishnan R.
Nivetha G.
Lal B.
Triveni K.R.
Gautam P.
George B.
Kulkarni U.
Mathews V.
Subramani K.
Rao S.
Chacko B.
Zachariah A.
Sathyendra S.
Hansdak S.G.
Abraham O.C.
Iyadurai R.
Karthik R.
Peter J.V.
Mo Y.
Veeraraghavan B.
Varghese G.M.
Paterson D.L.
George M.M.
Palanikumar P.
Nagaraj V.
Bhanuprasad K.
Krishnan R.
Nivetha G.
Lal B.
Triveni K.R.
Gautam P.
George B.
Kulkarni U.
Mathews V.
Subramani K.
Rao S.
Chacko B.
Zachariah A.
Sathyendra S.
Hansdak S.G.
Abraham O.C.
Iyadurai R.
Karthik R.
Peter J.V.
Mo Y.
Veeraraghavan B.
Varghese G.M.
Paterson D.L.
Corresponding Author(s)
Other Contributor(s)
Abstract
Introduction: International guidelines recommend definitive combination antibiotic therapy for the management of serious infections involving carbapenem-resistant Acinetobacter (CRAB) species. The commonly available combination options include high-dose sulbactam, polymyxins, tetracyclines, and cefiderocol. Scanty prospective data exist to support this approach. Methods: Patients with CRAB bacteraemia, ventilator-associated pneumonia (VAP), or both were categorized based on whether they received combination therapy or monotherapy. The 30-day mortality was compared between the two groups. Inverse probability treatment weighting (IPTW) was done using propensity score (PS) for a balanced comparison between groups. Results: Between January 2021 and May 2023, of the 161 patients with CRAB bacteraemia (n = 55, 34.2%), VAP (n = 46, 28.6%), or both (n = 60, 37.3%) who received appropriate intravenous antibiotic therapy, 70% (112/161) received monotherapy, and the rest received combination therapy. The overall 30-day mortality was 62% (99/161) and not different (p = 0.76) between the combination therapy (31/49, 63.3%) and monotherapy (68/112, 60.7%) groups. The propensity score matching using IPTW did not show a statistical difference (p = 0.47) in 30-day mortality for receiving combination therapy with an adjusted odds ratio (OR) P of 1.29 (0.64, 2.58). Conclusion: Combination therapy for CRAB infections needs further study in a randomised controlled trial, as this observational study showed no difference in 30-day mortality between monotherapy and combination therapy.