Survey Report 2010-1 LA.pdf - NASCOLA

ECAT FOUNDATION EXERCISE 2010-1
INTERNATIONAL EXTERNAL QUALITY ASSESSMENT Page 5 of 12
PROGRAMME IN HAEMOSTASIS AND THROMBOSIS Print date: 08 June 2010
Copyright © 2010 ECAT Foundation
Labcode: 900
RATIO CONFIRMATION n mean CV range
APTT 58 1.13 16.8% 0.75 – 1.90
Actin FS (Siemens) 17 1.02 8.5% 0.76 – 1.14
PT 8 1.21 1.04 – 1.81
DRVVT 293 1.09 12.8% 0.79 – 2.17
DVV Confirm (AD) 16 1.11 14.4% 0.91 – 1.43
LAC confirm (I.L.) 66 1.08 7.3% 0.88 – 1.37
LA confirm (Life Diagnostics) 35 1.08 11.1% 0.89 – 1.54
LA Sure (Precision Biologic) 12 1.03 12.6% 0.82 – 1.30
LA2 confirmation (Siemens) 109 1.07 11.2% 0.88 – 1.59
DRVVT Confirm (Stago) 30 1.04 9.1% 0.79 – 1.24
KCT 1 1.07
PNP 15 1.17 27.4% 0.80 – 1.90
dAPTT 9 1.23 0.87 – 1.51
dPT 5 1.10 0.98 – 1.19
SCT 11 1.31 21.4% 1.06 – 2.01
Comparison classification survey 2009-4 and 2010-1
In this survey the same sample was distributed as in survey 2009-4. In totally 259 participants had participated
in both surveys. Of them 59% gave the same final conclusion in both surveys.
The table below shows the comparison of the classification of both surveys in detail.
2009-4
2010-1
Normal Borderline Weakly Positive
Positive
Strongly
Positive
No
classification
Normal 5 2 1 5 0 0
Borderline 1 4 2 0 0 0
Weakly Positive 1 7 15 19 1 0
Positive 3 6 17 99 17 0
Strongly Positive 0 0 2 18 28 1
No classification 1 0 0 1 0 3
Although about 40% of the participants came to a different final conclusion in survey 2010-1, only a minority of
participants (n=5) classified the sample in 2009-4 as borderline – positive and gave in the 2010-1 survey a
negative classification. On the other hand, 8 participants who classified the sample normal in the 2009-4 survey,
classified the sample in the 2010-1 survey as borderline – positive.