Thrombin-Accelerated Quick Clotting Serum Tubes: An Evaluation with 22 Common Biochemical Analytes

Table 3

Summary of Passing-Bablok regression and Bland-Altman bias between RST and SST.

Analyte		Passing-Bablok		Correl		95% CI bias		95% limitAgrmt
	Sample size	Slope	Constant	rs	mBias%	Min.	Max.	Min.	Max.
Urea	106	1.00	0.00	0.99	−0.7	−1.5	−0.0	−8.2	6.7
Creatinine	127	0.98	0.55	0.99	−0.9	−1.7	−0.1	−9.7	8.0
Bicarbonate	104	1.00	0.00	0.86	−0.5	−1.6	0.5	−11.1	10.0
Glucose	97	1.00	0.00	0.99	0.8	0.1	1.5	−6.2	7.7
Sodium	106	1.00	0.00	0.82	−0.2	−0.4	0.0	−2.2	1.8
Potassium	108	1.00	0.00	0.91	0.3	−0.3	1.0	−6.2	6.9
Chloride	106	1.00	0.00	0.83	0.0	−0.2	0.2	−2.4	2.4
Total protein	107	1.00	0.00	0.95	0.4	0.0	0.7	−3.0	3.7
Albumin	127	1.00	0.00	0.98	0.7	0.4	1.0	−2.7	4.0
Total Bilirubin	110	1.00	0.00	0.94	−1.5	−4.4	1.3	−31.4	28.4
ALP	108	1.00	0.00	0.99	−0.6	−1.4	0.2	−8.9	7.8
ALT	129	1.00	0.00	0.98	−2.1	−3.9	−0.3	−22.3	18.2
AST	121	1.00	0.00	0.96
Cholesterol	93	0.99	0.04	0.99	0.6	0.2	1.1	−3.4	4.7
HDL	93	1.02	−0.03	0.99	−2.0	−5.6	1.6	−36.3	32.2
Triglycerides	93	1.00	0.02	1.00	1.5	1.0	2.0	−3.5	6.5
TSH	98	1.06	−0.01	0.99	2.8	1.1	4.4	−13.3	18.8
fT4	98	0.96	0.48	0.84	−0.3	−1.8	1.3	−15.5	15.0
Troponin-T	86	1.00	0.00	0.88	0.0	0	0	0	0
CK-MB	86	1.00	−0.03	1.00	−1.7	−2.5	−1.0	−8.6	5.1
NT-proBNP	85	1.01	−0.16	1.00	0.9	−0.7	2.4	−13.3	15.0
PSA	87	0.98	0.00	0.97	−2.1	−4.9	0.8	−28.3	24.1

Passing Bablok: slope, constant.
Correl: Spearman’s correlation coefficient: rs
mBias%: Bland-Altman mean Bias with 95% confidence interval and 95% limits of agreement.