| Proficiency testing Attempt | Total tests conducted | Negative control | Invalid results (number invalid/total number, %) | Internal concordance (same patient, same laboratory)* | External concordance (same specimen, different laboratory)* | Comments | Outcome of proficiency testing attempt | |
| Benchmark | Clean | ≤10% | ≥ 95% | ≥ 95% | ||||
| Lab A | 1st | 48 | Contamination | 14/ 48 (29%) | - | - | Terminated due to contamination | Failed: Repeat |
| 2nd | 22 | Clean | 15/22 (70%) | - | - | Terminated due to high invalidity rate as benchmark could not be achieved | Failed:Repeat | |
| 3rd | 100 | Clean | 4/100 (4%) | 48/48 (100%)* | 19/19 (100%)* | * One sample excluded due to invalid result | Proficiency achieved | |
| Lab B | 1st | 100 | Clean | 15/100(15%) | 36/37 (97%)* | 17/17 (100%)* | 17/17 (100%)* | Failed: Repeat |
| 2nd | 100 | Clean | 6/100 (6%) | 46/46 (100%)* | 20/20 (100%) | Proficiency achieved | ||
| Lab C | 1st | 100 | Clean | 7/100 (7%) | 46/46 (100%)* | 19/20 (95%) | Proficiency achieved | |
| Lab D | 1st | 96 | Contamination | 24/96 (25%) | Terminated due to contamination | Failed:Repeat | ||
| Lab E | 1st | 100 | Clean | 4/100 (4%) | 48/48(100%)* | 20/20 (100%) | Proficiency achieved | |
| Lab F | 1st | 50 | Clean | 11/50(22%) | Terminated due to high invalidity rate as benchmark could not be achieved | Failed:Repeat | ||
| 2nd | 100 | Clean | 2/100(2%) | 47/48 (97.9%)* | 19/20 (95%) | Proficiency achieved |