Fig. 3

Antibiotic therapy: administration methods and durations. a First empiric antibiotic (540 cases). b Second empiric antibiotic (406 cases). c Third antibiotic, targeted for known susceptibility (278 cases). d Fourth antibiotic, targeted for known susceptibility (79 cases). In total, 406 cases (75.2 %) were treated with combined empiric therapy; 278 cases were switched to targeted antibiotics after empiric antibiotic administration. Intraperitoneal administration: 277 (51.4 %) for first antibiotic and 236 (59.4 %) for second antibiotic. Total administration periods were 16.5 ± 9.3 days. CEZ cefazolin, CAZ ceftazidime, VCM vancomycin, CTM cefotiam, CMZ cefmetazole, TOB tobramycin, AMK amikacin, MEMP meropenem, LVFX levofloxacin, CCL cefaclor, RFP rifampicin, IP intraperitoneal cavity administration, IV intravenous administration