As mentioned before, it is annual report time for CMPT. Our annual meeting is coming up soon.
One of the names that is used for proficiency testing is "Inter-Laboratory Comparison". There are many reasons to get rid of this name and indeed the concept because it implies that the point of the exercise is to somehow do "better" than other laboratories. All that does is foster being duplicitous (i.e. cheat), and to view PT as something other than a quality measuring tool.
But at the same time, there are some advantages of creating a consistent method of grading performance, so that laboratories can monitor their own progress and performance, and provincial or state authorities can measure group performance.
In our program we developed a measurement which we call “Percent Achievability”
In our program, we have 4 classes of laboratories: (A) complex , (B) Intermediate, (C) small, (C1) pack-and-ship.
Each group gets a set of samples that matches its level of complexity.
(A) laboratories get more samples and more complex samples.
(C1) laboratories get fewer and limited.
Each sample or subcomponent of a sample, is graded in the same manner.
(4) Full value (3) Acceptable – with minor error (1) Unacceptable – major error and (0) Unacceptable – potential negative impact on patient care.
To measure Percent Achievability” we would take the score that a laboratory achieved over a year, and divide that by the score they would have received if all their challenges had received Full value.
For example: if a laboratory did 10 tests and received 8 Full Value (4) and 2 Acceptable – minor (3), their score would be 38, and their %Achievability would be 38/40 (95%).
We have tracked this now for a decade and have seen that over the years category (A) laboratories have maintained a consistent % Achievability near 95%, while smaller laboratories have not maintained the same level of success.
(see graph).
First of all, I believe this graph to be a reflection of reality, and I think we can account for how and why this has happened.
As laboratory consolidation has occurred larger laboratories have been able to retain their expertise and competency, while smaller laboratories have not.
So my question is …
Is this a phenomenon that you are seeing in your jurisdiction?