Laboratory Medicine Online

Table. 4. Table 4

Status of delta percent change and delta difference application

	AFP	CA125	CA19-9	CEA	PSA	T3	Free T4	TSH
Delta percent change (%)
4.5								1 (4.8)
5	1 (4.2)				2 (8.3)			1 (4.8)
6			1 (4.2)
6.5							1 (4.5)
7				1 (4.2)		1 (4.5)
8		1 (4.0)
10	1 (4.2)	1 (4.0)	1 (4.2)	1 (4.2)	1 (4.2)	1 (4.5)	1 (4.5)	1 (4.8)
20	5 (20.8)	6 (24.0)	6 (25.0)	6 (25.0)	3 (12.5)	4 (18.2)	4 (18.2)	4 (19.0)
25	1 (4.2)	1 (4.0)	1 (4.2)	1 (4.2)	1 (4.2)	1 (4.5)	1 (4.5)	1 (4.8)
28.2	1 (4.2)
28.63						1 (4.5)
30	3 (12.5)	4 (16.0)	2 (8.3)	2 (8.3)	3 (12.5)	2 (9.1)	2 (9.1)	2 (9.5)
31.86							1 (4.5)
47.4				1 (4.2)
49.20			1 (4.2)
50	10 (41.7)	11 (44.0)	12 (50.0)	11 (45.8)	13 (54.2)	12 (54.5)	12 (54.5)	10 (47.6)
56.95		1 (4.0)
58.55								1 (4.8)
90	1 (4.2)			1 (4.2)
+200/−50	1 (4.2)
Total laboratories	24	25	24	24	24	22	22	22
Delta difference (absolute value)
0.7						1 (25.0)
1.2								1 (20.0)
1.72							1 (33.3)
2					2 (40.0)			1 (20.0)
2.6								1 (20.0)
3				1 (33.3)	1 (20.0)		2 (66.7)
4					1 (20.0)
5								2 (40.0)
8	1 (50.0)
16				1 (33.3)
20	1 (50.0)
28		1 (100.0)
30						1 (25.0)
32			1 (100.0)
50				1 (33.3)
+30/−15						2 (50.0)
+100/−50					1 (20.0)
Total laboratories	2	1	1	3	5	4	3*	5

*One laboratory did not respond to delta check criteria.

Abbreviations: AFP, alpha-fetoprotein; CA125, cancer antigen 125; CA19-9, cancer antigen 19-9; CEA, carcinoembryonic antigen; PSA, prostate-specific antigen; TSH, thyroid-stimulating hormone; T3, triiodothyronine; T4, thyroxine.

Lab Med Online 2023;13:324~331 https://doi.org/10.47429/lmo.2023.13.4.324