Comparison of mode and geometric mean criteria for anti-A
| Year | Round | Methods | No. | Acceptable (%) | |||
|---|---|---|---|---|---|---|---|
| Mode±1 titer | GM±1 GSD | GM±2 GSD | GM±3 GSD | ||||
| 2016 | 1st | Tube, IS | 41 | 34 (82.9) | 34 (82.9) | 39 (95.1) | 40 (97.6) |
| 2016 | 2nd | Tube, IS | 42 | 36 (85.7) | 28 (66.7) | 39 (92.9) | 42 (100.0) |
| 2017 | 1st | Tube, IS | 42 | 40 (95.2) | 22 (52.4) | 40 (95.2) | 42 (100.0) |
| 2017 | 2nd | Tube, IS | 42 | 37 (88.1) | 34 (81.0) | 40 (95.2) | 42 (100.0) |
| 2018 | 1st | Tube, IS | 41 | 40 (97.6) | 40 (97.6) | 40 (97.6) | 41 (100.0) |
| 2018 | 2nd | Tube, IS | 37 | 35 (94.6) | 34 (91.9) | 35 (94.6) | 36 (97.3) |
| 2019 | 1st | CAT, AHG | 30 | 30 (100.0) | 16 (53.3) | 28 (93.3) | 30 (100) |
| 2019 | 1st | Tube, IS | 39 | 35 (89.7) | 29 (74.4) | 38 (97.4) | 38 (97.4) |
| 2019 | 2nd | CAT, AHG | 32 | 32 (100.0) | 15 (46.9) | 32 (100.0) | 32 (100.0) |
| 2019 | 2nd | Tube, IS | 38 | 34 (89.5) | 27 (71.1) | 34 (89.5) | 38 (100.0) |
| 2020 | 1st | Tube, IS | 38 | 37 (97.4) | 35 (92.1) | 35 (92.1) | 38 (100.0) |
| 2020 | 2nd | CAT, AHG | 35 | 35 (100.0) | 24 (68.6) | 35 (100.0) | 35 (100.0) |
| 2020 | 2nd | Tube, IS | 35 | 33 (94.3) | 31 (88.6) | 31 (88.6) | 35 (100.0) |
The mode criteria reflect the current Korean proficiency-testing scheme. Bold indicates results with
Abbreviations: GM, geometric mean; GSD, geometric standard deviation; IS, immediate spin technique; CAT, column agglutination technique; AHG, anti-human globulin.