|
Transfer of values from CAL to X in the NORIP project and The Nordic Trueness
Project.
Exactly the same calculations have been done in both projects: First a factor for each
laboratory (X/CAL), then mean and s calculated after removal of factors deviating more
than 4s from mean (mean and s from all labs); numbers of labs before and after removal
Ntot and Nrest respectively.
Uncertainty of difference calculated as u=(s12/n1 + s22/n2)1/2
and z = (m1-m2)/u
p is significance of difference
Conclusion:
% difference is significant for 4 components on 1% level, all absolute differences
<=0.8% exept for bilirubin which is 2.8%.
The material handling in the two projects is a bit different, samples were sent on dry
ice in NORIP project but thawed in the Trueness project.
|
NORIP |
|
IMEP |
DIFFERENCE |
|
|
deleted |factor-m| > 4s |
|
deleted |factor-m| > 4s |
|
Component |
Median |
M |
s |
Nrest |
Ntot |
|
M |
s |
Nrest |
Ntot |
%diff |
z |
p |
|
Na |
1.02474 |
1.02363 |
0.00787 |
112 |
113 |
|
1.02452 |
0.00693 |
126 |
128 |
-0.1
% |
-0.92 |
0.36
|
|
K |
1.00000 |
0.99806 |
0.01110 |
112 |
113 |
|
0.99893 |
0.00922 |
126 |
128 |
-0.1
% |
-0.65 |
0.51
|
|
Creatinin |
1.04869 |
1.04988 |
0.03269 |
111 |
112 |
|
1.04718 |
0.01621 |
129 |
131 |
0.3
% |
0.79 |
0.43
|
|
Urea |
1.02084 |
1.02124 |
0.02071 |
103 |
104 |
|
1.02322 |
0.01571 |
127 |
127 |
-0.2
% |
-0.80 |
0.42
|
|
Protein |
1.02526 |
1.02346 |
0.01422 |
86 |
86 |
|
1.02197 |
0.00784 |
88 |
89 |
0.1
% |
0.85 |
0.39
|
|
Albumin |
1.02014 |
1.01896 |
0.01592 |
114 |
115 |
|
1.02637 |
0.01212 |
125 |
127 |
-0.7
% |
-4.02 |
0.00006
|
** |
Glucose |
0.98810 |
0.98696 |
0.01354 |
100 |
101 |
|
0.98708 |
0.01365 |
126 |
128 |
0.0
% |
-0.07 |
0.95
|
|
Ca |
1.02236 |
1.02066 |
0.01477 |
110 |
111 |
|
1.02566 |
0.00975 |
119 |
120 |
-0.5
% |
-3.00 |
0.0027
|
** |
Mg |
1.01297 |
1.01456 |
0.02419 |
87 |
87 |
|
1.01686 |
0.01758 |
91 |
92 |
-0.2
% |
-0.73 |
0.47
|
|
P
inorg |
1.01264 |
1.01262 |
0.01804 |
107 |
107 |
|
1.01289 |
0.01113 |
105 |
106 |
0.0
% |
-0.13 |
0.90
|
|
Uric
acid |
1.06398 |
1.06204 |
0.01629 |
109 |
110 |
|
1.06769 |
0.02223 |
122 |
124 |
-0.5
% |
-2.22 |
0.026
|
* |
Cholesterol |
1.06318 |
1.06294 |
0.01697 |
113 |
113 |
|
1.06500 |
0.01110 |
122 |
123 |
-0.2
% |
-1.09 |
0.27
|
|
Trigly |
0.98479 |
0.98244 |
0.02047 |
110 |
111 |
|
0.99075 |
0.01203 |
107 |
108 |
-0.8
% |
-3.65 |
0.00026
|
** |
Bilirubin |
1.04418 |
1.05476 |
0.05281 |
113 |
114 |
|
1.08468 |
0.07068 |
119 |
121 |
-2.8
% |
-3.66 |
0.00025
|
** |
ALP |
1.09783 |
1.09812 |
0.01854 |
102 |
103 |
|
|
|
|
|
|
|
|
|
Amylase |
1.03470 |
1.03488 |
0.02579 |
77 |
78 |
|
|
|
|
|
|
|
|
|
AST |
1.07576 |
1.07706 |
0.03070 |
99 |
100 |
|
|
|
|
|
|
|
|
|
Alt |
1.36955 |
1.37521 |
0.11038 |
112 |
112 |
|
|
|
|
|
|
|
|
|
CK |
1.12051 |
1.12436 |
0.02375 |
105 |
105 |
|
|
|
|
|
|
|
|
|
LD |
1.11331 |
1.11108 |
0.05252 |
96 |
96 |
|
|
|
|
|
|
|
|
|
Fe |
0.94591 |
0.94273 |
0.01806 |
96 |
97 |
|
0.94010 |
0.02674 |
96 |
97 |
0.3
% |
0.80 |
0.42
|
|
TIBC |
1.01337 |
1.01252 |
0.01608 |
36 |
37 |
|
|
|
|
|
|
|
|
|
T4 |
1.01612 |
1.01430 |
0.03701 |
7 |
7 |
|
|
|
|
|
|
|
|
|
GT |
0.98413 |
0.98690 |
0.02871 |
99 |
100 |
|
0.98713 |
0.01256 |
108 |
109 |
0.0
% |
-0.08 |
0.94
|
|
TSH |
1.22341 |
1.21307 |
0.06997 |
10 |
10 |
|
|
|
|
|
|
|
|
|
Ferritin |
1.06838 |
1.05957 |
0.03515 |
8 |
8 |
|
|
|
|
|
|
|
|
|
P-Amylase |
1.07819 |
1.07903 |
0.01950 |
33 |
33 |
|
|
|
|
|
|
|
|
|
HDL |
1.04359 |
1.04172 |
0.02083 |
106 |
107 |
|
1.04543 |
0.02157 |
100 |
101 |
-0.4
% |
-1.25 |
0.21
|
|
|