Performance Characteristics: Accuracy - Siemens ADVIA 2120 Operator's Manual

Performance Characteristics: Accuracy

The accuracy of the CSF WBC count was evaluated by comparing manual counts
from 90 samples to counts from the ADVIA 120 Hematology System. Accuracy
statistics are found in the tables below.
CSF WBC Count
The accuracy of the CSF WBC count was evaluated by comparing manual counts
from 90 samples to counts from the ADVIA 120 Hematology System. Accuracy
statistics are found in the table below.
R
0.981
CSF RBC Count
The accuracy of the CSF RBC count was evaluated by comparing manual counts
from 78 CSF patient samples to counts from the ADVIA 120 Hematology
System. Accuracy statistics are found in the table below.
R
0.989
Absolute CSF WBC Differential
The accuracy of the CSF absolute WBC differential was evaluated by comparing
manual counts from 50 CSF patient samples to counts from the ADVIA 120
Hematology System. Accuracy statistics are found in the table below.
Parameter
# MN
# PMN
# Neut
# Lymph
# Mono
CSF WBC Differential Relative Percentages
The accuracy of the CSF WBC Differential relative percentages was evaluated
by comparing manual counts from 50 CSF patient samples to counts from the
ADVIA 120 Hematology System. The WBC differential relative percentages
were analyzed by paired t-test and Rümke analysis as recommended in CLSI
Document M29-A3. The results below give a p-value for the paired t-test and the
percentage of results falling within the binomial limits.
9-42
Slope Intercept
1.38 2
Slope Intercept
1.18 -19
R Slope Intercept
0.896 1.07 4
0.973 1.24 0
0.971 1.22 0
0.859 0.88 4
0.849 1.69 1
Manual
Syx Mean
14 20
Manual
Syx Mean
481 551
Manual
Syx Mean
8 9
11 10
11 10
7 10
4 1
ADVIA 120
Mean Bias
30 10
ADVIA 120
Mean Bias
628 77
ADVIA 120
Mean Bias
14 5
12 2
12 2
8 -2
4 3
Regulatory Information