Posted by Sten Westgard, MS
So here's a Normalized Method Decision chart for a cholesterol method.
Which method would you choose?
Posted by Sten Westgard, MS
Posted by Sten Westgard, MS
Recently, a user submitted a question about the mandatory use of the 10x rule on chemistry analytes as mandated by ISO 15189 through NABL:
"Specific criteria of accreditation of NABL India (for ISO 15189) say that 10x should be considered as a violation for clinical chemistry and Immunoassay parameters. However we understand that Westgard rules consider it as a warning only. Please advise."
So, the central question is, does ISO 15189 mandate the use of the 10x control rule?
-----
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...
-----
Posted by Sten Westgard, MS
Posted by Sten Westgard, MS
Posted by Sten Westgard, MS
Posted by Sten Westgard, MS
Posted by Sten Westgard, MS
Sten Westgard, MS
Posted by Sten Westgard, MS
Posted by Sten Westgard, MS
Posted by Sten Westgard, MS