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Table 2 Selected antimicrobial sensitivity testing results and MHT results of the RAPD clusters

From: Spread of resistant gram negatives in a Sri Lankan intensive care unit

Characteristic Cluster 1
n = 22
Cluster 2
n = 5
Cluster 3
n = 3
p value**
Amikacin non-susceptibilitya 17 (77.3%) 4 (80%) 1 (33.3%) 0.313
Gentamicin non-susceptibility 22 (100%) 3 (60%) 2 (66.7%) 0.013
Ceftazidime non-susceptibility 22 (100%) 5 (100%) 1 (33.3%) 0.007
MHT positive 14 (63.6%) 4 (80%) 2 (66.7%) 1.000
  1. aNon-susceptible = intermediate sensitive + resistant
  2. **p value calculated with the Freeman-Halton extension of Fisher’s exact test using Soper, D.S. (2016). Fisher’s Exact Test Calculator for a 2 × 3 Contingency Table [Software]. Available from http://www.danielsoper.com/statcalc