The study of statistical methods for evaluating the comparability of routine chemistry analytes among 3 routine laboratory measurement systems in China

Zhong, Kun; Wang, Wei; Zhang, Chuanbao; He, Falin; Yuan, Shuai; Wang, Zhiguo

doi:10.1186/s40064-016-3423-7

SpringerPlus

Table 2 The regression equations and the differences in MDLs

From: The study of statistical methods for evaluating the comparability of routine chemistry analytes among 3 routine laboratory measurement systems in China

No. of lab	Regression equation	Slope	Intercept	Correlation	Differences in MDLs (%)			Conclusion
No. of lab	Regression equation	Slope	Intercept	Coefficient	MDL1	MDL2	MDL3	Conclusion
1	y = 1.014*x − 0.002	1.014	−0.002	0.9999	1.32	1.37	1.38	All less than desirable
2	y = 1.008*x − 0.044	1.008	−0.044	0.9997	−0.96	0.14	0.36	All less than optimal
3	y = 1.007*x + 0.053	1.007	0.053	0.9997	2.82	1.49	1.23	Two less than desirable
4	y = 0.989*x − 0.072	0.989	−0.072	0.9999	−3.98	−2.18	−1.82	Two less than desirable
5	y = 1.020*x + 0.158	1.020	0.158	0.9998	8.32	4.37	3.58	All bigger than min
6	y = 1.018*x − 0.009	1.018	−0.009	0.9994	1.44	1.67	1.71	All less than desirable
7	y = 0.968*x − 0.029	0.968	−0.029	0.9999	−4.36	−3.63	−3.49	One less than min
8	y = 0.938*x − 0.120	0.938	−0.120	0.9997	−11.00	−8.00	−7.40	All bigger than min
9	y = 1.011*x + 0.100	1.011	0.100	0.9994	5.10	2.60	2.10	Two less than min
10	y = 0.963*x − 0.042	0.963	−0.042	0.9999	−5.38	−4.33	−4.12	All bigger than min
11	y = 0.928*x + 0.630	0.928	0.630	0.9975	18.00	2.25	−0.90	Two less than desirable
12	y = 0.988*x + 0.046	0.988	0.046	0.9999	0.64	−0.51	−0.74	All less than optimal
13	y = 1.011*x − 0.007	1.011	−0.007	0.9999	0.82	1.00	1.03	All less than optimal
14	y = 1.064*x − 0.042	1.064	−0.042	0.9800	4.72	5.77	5.98	All bigger than min
15	y = 0.982*x + 0.030	0.982	0.030	0.9996	−0.60	−1.35	−1.50	All less than desirable
16	y = 1.055*x + 0.016	1.055	0.016	0.9998	6.14	5.74	5.66	All bigger than min
17	y = 0.993*x − 0.001	0.993	−0.001	0.9996	−0.74	−0.71	−0.71	All less than optimal
18	y = 0.964*x + 0.133	0.964	0.133	0.9999	1.72	−1.61	−2.27	All less than desirable
19	y = 1.029*x − 0.174	1.029	−0.174	0.9998	−4.06	0.29	1.16	Two less than optimal
20	y = 0.989*x + 0.025	0.989	0.025	0.9995	−0.10	−0.73	−0.85	All less than optimal

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