Risk factors for carbapenem-resistant Klebsiella pneumoniae infection: A meta-analysis

Objectives: Rates of nosocomial infections caused by carbapenem-resistant Klebsiella pneumoniae (CRKP) have increased. A meta-analysis was conducted to explore risk factors for CRKP infection in order to provide a theoretical basis for reducing the CRKP infection rate and actively preventing CRKP infection. Methods: Online databases, including PubMed, EMBASE, OVID, ClinicalKey, CNKI, CBM, Wanfang Database and CHKD, were searched from inception up to 31 October 2018 for articles regarding risk factors for CRKP infection. Relevant articles were retrieved, supplemented by retrospective and manual search literature. RevMan 5.3 software was used for statistical analysis. Results: A total of 30 articles comprising 5075 cases were included in the study, of which 24 were in English and 6 were in Chinese. The results showed that age, sex and diabetes mellitus were not associated with CRKP infection. The odds ratio (95% confidence interval) of risk factors for CRKP infection were as follows: immunosuppression, 1.47 (1.14–1.90); ICU admission, 3.25 (2.36–4.47); antibiotic exposure, 2.53 (1.56–4.11); carbapenem exposure, 3.99 (2.86–5.56); quinolone exposure, 1.75 (1.38–2.22); glycopeptide exposure, 3.08 (1.93–4.91); β‑lactam/β‑lactamase inhibitor (BL/BLI) exposure, 2.28 (1.37–3.80); surgery, 1.59 (1.08–2.34); mechanical ventilation, 2.91 (1.96–4.31); central venous catheterisation, 2.93 (2.00–4.28); indwelling catheter, 2.62 (1.65–4.17); and nasogastric intubation, 2.38 (1.22–4.62). Conclusion: Immunosuppression, ICU admission, antibiotic exposure (including carbapenems, quinolones, glycopeptides and BL/BLIs), surgery, mechanical ventilation, central venous catheterisation, indwelling catheter and nasogastric intubation were identified as risk factors for CRKP infection and should to be considered in clinical practice.

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