Perspectives in Data Interpretation

Question 1

What is the phase of error is most common

Answer 1

Pre-Analytical Phase

Question 2

Analytical Phase

Answer 2

Errors with the analyzer - instrument function, personnel knowledge and training, SOPs

Question 3

Reference Interval

Answer 3

Describes flunctuations of disease in a healthy population

Question 4

Diagnostic Specificity

Answer 4

Measures the frequency with which a test result will be negative in animals that do not have the disease of interest

_______________________

A specific result helsp rule in a diseas

Question 5

Negative Predicitve Value

Answer 5

Probability that a negative test result truly indicates the animal does not have the disease.

Question 6

Technical Effects

Answer 6

Errors due to sampling technique and specimen management before analysis

Question 7

Negative Predictive Value =

Answer 7

NPV = TN / (TN+FN) x 100%

Question 8

Biogical Factors in pre-analytical error

Answer 8

Errors inherent with the animal sampled

Question 9

How many animals sampled would make a great reference interval?

Answer 9

> 120

Question 10

Diagnostic Accuracy

Answer 10

Measures the frequncy that a test correctly classifies an animal as having or not having a disease

______________________

High diagnostic accuracy has few false positives and false negatives

Question 11

Positive Predictive Value =

Answer 11

PPV = TP/ (TP+FP) x 100%

Question 12

Post-Analytical Phase

Answer 12

Errors in transcription

Misinterpretation / misreading results

Question 13

3 phases of error

Answer 13

Pre-Analytical Phase

Analytical Phase

Post-Analytical Phase

Question 14

Positive Predictive Value

Answer 14

Probability that a positive (abnormal) test result truely indicates teh animal has the disease

Question 15

2 major categories of errors that occur during the pre-analytical phase

Answer 15

Technical Effects

Biological Factors

Question 16

Pre- Analytical Phase

Answer 16

Process that starts in chronological order, from the clinicians request and include the examination request, preparation and identification of the patient, collection of the primary sample and transportaion to and within the laboratory and end when the analytical examination begins

Question 17

Diagnostic Sensitivity

Answer 17

Measures the frequency in which a test result will be positive in animals with the disease of interest

__________________________

A senstive test helps rule out a disease when the result is negative