a decreasing trendp < 0.05
During the 3-year period, the resistance rate to piperacillin-tazobactam initially declined but then increased ( p < 0.05), while resistance to ceftazidime-avibactam, aztreonam, imipenem, ciprofloxacin, levofloxacin, and amikacin showed a decreasing trend ( p < 0.05).