Haematology and immunology
Platelet count, ×10⁹/L
Haematology analyser A, fluorescent platelet count replaced by Haematology analyser B, optical platelet count. 21 paired results.
Compare it with the other comparisons in the explorer
Comparison line
The new system reads 58.2% higher than the old system on average. The comparison line has a slope of 0.875 (95% interval 0.509 to 1.63) and an intercept of 52.129.
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 moved across a decision limit when the new system 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 after the change: 8
Expected from repeat testing alone: about 0
Grade and warnings
- Re-test band not computed: 21 usable pairs, fewer than 40.
- Repeat-test imprecision: assumed, not measured at this site.
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). Changes: Paired results re-analysed by NakedSignal's program; instruments described generically; only derived results are shown. The deposit names the systems.
Show the numbers
| Field | Value |
|---|---|
| Paired results used | 21 |
| Comparison line slope | 0.874878 |
| Slope, 95% interval | 0.509163 to 1.63048 |
| Comparison line intercept | 52.129032 |
| Mean difference, new minus old, as % of old | 58.163 |
| Decision limits (×10⁹/L) | 100, 150 |
| Crossed after the change | 8 |
| Expected from repeat testing alone | 0.25 |
| 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 |