Haematology and immunology
Platelet count, ×10⁹/L
Haematology analyser A, pre-diluted fluorescent platelet count compared with Haematology analyser B, pre-diluted optical platelet count. 21 paired results.
Compare it with the other comparisons in the explorer
Comparison line
The new system reads 5% higher than the old system on average. The comparison line (Passing-Bablok) has a slope of 1.101 (95% interval 0.803 to 1.858) and an intercept of -18.001.
Fig. 1. The comparison line against the line of no change, over the range of the decision limits (100, 150 ×10⁹/L). Dots mark where each line meets each limit; the gap between them is the bias at that limit.
Crossing each limit
Results that fall on the other side of a decision limit on the new system than on the old, read as if the new system had replaced the old, against the number repeat testing on one unchanged system would move. The program reports the count across all limits together.
All decision limits together (100, 150 ×10⁹/L)
Crossed between the two systems: 6
Expected from repeat testing alone: about 3
Grade and warnings
- Re-test band not computed: 21 usable pairs, fewer than 40.
- Repeat-test imprecision: default value.
Source
Xiong L, Pan X, Peng M, Gan T, Deng C, Zha H, Wang Y (2026). Evaluation of pre-dilution combined with optical/fluorescent platelet counting for correcting pseudothrombocytopenia. Front Med (Lausanne). doi:10.3389/fmed.2026.1855339 (opens in a new tab); PMC13395694 (opens in a new tab). Licence: CC BY 4.0 (opens in a new tab). Re-analysed by NakedSignal. The deposit names the systems.
Show the numbers
| Field | Value |
|---|---|
| Paired results used | 21 |
| Comparison line slope | 1.101019 |
| Slope, 95% interval | 0.802866 to 1.857912 |
| Comparison line intercept | -18.000849 |
| Mean difference, new minus old, as % of old | 5.03 |
| Decision limits (×10⁹/L) | 100, 150 |
| Crossed between the two systems | 6 |
| Expected from repeat testing alone | 3.31 |
| Band half-width (%) | none |
| Re-tested, unseen data, median (%) | none |
| Re-tested, unseen data, range (%) | none |
| Excess caught, line and band (%) | none |
| Excess caught, line alone (%) | none |