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Table. 3.

Table. 3.

Delta check criteria based on delta check values ≥99.5% in the distribution with a frequency of 0.9%–1.1% for the nine CBC items tested by the five delta check methods

CBC item Absolute delta difference DPC (%) DPC rate (%/day) DPC/RR (%) DPC/RR rate (%/day)*

Outpatients Inpatients Outpatients Inpatients Outpatients Inpatients Outpatients Inpatients Outpatients Inpatients
Hb (g/L) 31.0 28.0 30.1 23.1 4.1 19.6 7.5 5.8 1.0 4.9
MCV (fL) 8.8 5.9 9.5 6.1 1.2 5.3 0.5 0.3 0.1 0.3
Platelets (109/L) 288.0 172.0 186.8 82.8 20.4 53.0 0.06 0.03 0.01 0.02
WBCs (109/L) 12.2 12.8 285.7 204.9 57.9 175.0 47.6 34.2 9.7 29.2
Neutrophils (%) 49.8 43.5 235.0 126.6 64.6 100.4 9.4 5.1 2.6 4.0
Lymphocytes (%) 40.1 35.2 264.0 316.7 44.4 236.7 11.0 13.2 1.9 9.9
Monocytes (%) 19.8 14.0 673.3 492.7 80.4 349.3 96.7 70.8 11.5 49.9
Eosinophils (%) 11.6 9.5 1,266.7 1,600.0 100.0 1,045.0 216.7 266.7 16.7 175.0
Basophils (%) 1.6 1.2 500.0 461.4 75.0 400.0 250.0 230.2 37.5 200.0

*The best delta check criteria for each CBC item in bold font.

Abbreviations: CBC, complete blood count; MCV, mean corpuscular volume; WBCs, white blood cells; DPC, delta percent change; RR, reference range.

Ann Lab Med 2023;43:418~424 https://doi.org/10.3343/alm.2023.43.5.418

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