This multi-centre retrospective study was designed to investigate the risk factors for infection with imipenem-resistant Pseudomonas aeruginosa in neonatal intensive care units (NICUs) in south China. All patients with confirmed P. aeruginosa infection from eight NICUs in south China were divided into two groups: imipenem-susceptible P. aeruginosa and imipenem-resistant P. aeruginosa. Data were analysed using Chi-squared test and logistic regression. In total, 188 medical records were reviewed. On multi-variate logistic analysis, the only independent risk factor was imipenem treatment within two weeks of isolation of P. aeruginosa (odds ratio 6.409, 95% confidence interval 1.926-21.333).
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