Percentage of nursing homes and affiliated medical centers with clinical agreement in bacteria-specific antimicrobial susceptibility. Agreement between NH-VAMC pairs was defined as NH and VAMC susceptibilities both ≥80% or both NH and VAMC susceptibilities <80%. Antibiotic-specific kappa statistics for gram-negative organisms in NHs vs VAMCs were as follows: ampicillin-sulbactam 0.38, cefazolin 0.29, cefepime 0.22, ceftriaxone 0.27, ciprofloxacin 0.48, imipenem 0.73, nitrofurantoin 0.71, piperacillin-tazobactam 0.07, and sulfamethoxazole-trimethoprim 0.43. Antibiotic-specific kappa statistics for gram-positive organisms in NHs vs VAMCs were as follows: ampicillin 0.22, clindamycin 0.12, gentamicin 0.50, linezolid 0.66, oxacillin 0.23, tetracycline 0.01, vancomycin 0.24. Antibiotic abbreviations: amp/sulb, ampicillin-sulbactam; pip/tazo, piperacillin-tazobactam; sulfa/trimeth, sulfamethoxazole-trimethoprim. (A) Findings for E coli. (B) Findings for Klebsiella spp. (C) Findings for P mirabilis. (D) Findings for P aeruginosa. (E) Findings for S aureus. (F) Findings for Enterococcus spp.