TABLE 4.
Resolution of discrepant results by arbitration
| Drug (concn [μg/ml]) | No. of tests | Initial result
|
Arbitrated result
|
|
|
||
|---|---|---|---|---|---|---|---|
| No. R by MGIT 960 but S by RRM | No. S by MGIT 960 but R by RRM | No. R by MGIT 960 and RRM (true resistant) | No. S by MGIT 960 and RRM (true susceptible) | No. R by MGIT 960 but S by RRMa | No. S by MGIT 960 but R by RRMb | ||
| AMI (1.0) | 13 | 0 | 13 | 2 | 9 | 1 | 1 |
| CAP (1.25) | 7 | 5 | 2 | 0 | 3 | 2 | 2 |
| OFL (1.0) | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| PRO (2.5) | 9 | 3 | 6 | 3 | 1 | 2 | 3 |
| PRO (5.0) | 3 | 1 | 2 | 0 | 0 | 1 | 2 |
| RIFB (0.5) | 2 | 0 | 2 | 0 | 1 | 0 | 1 |
| Total | 34 | 9 | 25 | 5 | 14 | 6 | 9 |
a
Classified as a false-resistant result (major error).
b
Classified as a false-susceptible result (very major error).