Table 4.

Test of agreement between serial pairs of E-test and agar dilution MICs

Antimicrobial agentInterclass correlation coefficients (±95% confidence interval)
Time 1Time 2Time 3Mean
Penicillin0.86 (0.82–0.90)0.96 (0.95–0.97)0.89 (0.86–0.92)0.94 (0.92–0.95)
Cefuroxime0.94 (0.92–0.95)0.96 (0.95–0.97)0.93 (0.91–0.95)0.93 (0.90–0.95)
Cefotaxime0.90 (0.87–0.93)0.95 (0.93–0.96)0.94 (0.91–0.95)0.97 (0.96–0.98)
Vancomycin0.19 (0.05–0.33)0.21 (0.06–0.34)0.18 (0.04–0.32)0.57 (0.42–0.68)