Posted by Sten Westgard, MS
An interesting question came from one of our readers, about how to interpret certain outliers.
So let's take one example, just two control values, expressed in z-scores. If the low control is -3.1 and the high control is + 2.3, which rule is violated? the 1:3s rule? The R:4s rule? Both?
An answer, after the jump...
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Posted by Sten Westgard, MS
An important new study was published in the International Journal of Laboratory Hematology, on the QC practices of coagulation laboratories.
But here's a question for you: of all these activities, how many of them occur greater than 90% of the time - and which one doesn't?
Repeat the QC, and if it passes, report results
Open [and run] new QC
Look for trending
Discontinue testing until controls are within limits
Repeat all patient samples from the last acceptable QC
To find out which one of the activities occurs at a frequency not like the others, follow the jump...
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Posted by Sten Westgard, MS
Can you guess just how bad US healthcare is at making the right diagnosis?
Is the error rate in the US related to diagnosis
5%?
10%?
6 to 17%?
all of the above?
The answer, after the jump...
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