Table 1.

Frequencies of amoxicillin-clavulanate (AMC)-resistantE. coli isolates by patient and hospital characteristics

ParameterNo. (%) of AMC-resistant E. coli isolates
199619971998
Children6 (3.8)5 (3.0)9 (5.1)
Adults78 (5.5)75 (5.7)66 (4.6)
Outpatients7 (2.5)a 7 (2.7)a 10 (3.4)
Inpatients81 (6.1)a 73 (6.0)a 65 (5.0)
Teaching hospitals42 (5.6)43 (5.5)45 (6.0)
Nonteaching hospitals46 (5.3)37 (5.3)30 (3.5)
  • a Significant difference between the frequencies of AMC-resistant E. coli isolated in outpatients and inpatients in 1996 (P = 0.01) and 1997 (P = 0.03).