Evaluating an Education Program to Reduce Indeterminate QuantiFERON Gold In-Tube Results
Table 4
Frequency of incorrectly answered questions and mean score and effect size of questions on preeducation and posteducation questionnaire.
Number of Nurses Answered Incorrectly n ()
Mean total score (±SD)
Questions
Pre-education (n=125)
Post-education (n=94)
Pre-education
Post-education
P Value
Effect size
What is the QuantiFERON Gold test used for?
14 (11.2)
3 (3.19)
89.4 (±31.0)
96.8 (±17.7)
0.034
0.30
What is the acceptable volume for QFT blood collection tubes?
92 (73.6)
42 (44.7)
29.8 (±46.0)
55.3 (±50.0)
<0.001
0.53
After blood is collected into the QFT blood collection tubes, what is the next step in the process?
9 (7.2)
15 (16.0)
92.6 (±26.4)
84.0 (±36.8)
0.059
0.27
What is the purpose of shaking the QFT blood collection tubes?
82 (65.6)
49 (52.1)
35.1 (±48.0)
47.9 (±50.2)
0.018
0.26
At what temperature do you store the tubes until they are delivered to the laboratory?
80 (64.0)
30 (31.9)
36.2 (±48.3)
68.1 (±46.9)
<0.001
0.67
What is the proper order for filling the blood collection tubes?
75 (60.0)
19 (20.2)
41.5 (±49.5)
79.8 (±40.4)
<0.001
0.85
Is frothing of blood in the QFT blood collection tubes normal after the shaking process?
29 (23.2)
15 (16.0)
79.8 (±40.4)
84.0 (±36.8)
0.374
0.11
Choose the appropriate phrase to complete the following sentence: When a “butterfly needle” is being used to collect blood, which is often done when many tubes require blood collection....
69 (55.2)
35 (37.2)
46.8 (±50.2)
62.8 (±48.6)
0.008
0.32
Can blood be drawn from a PICC or Central line for the QFT?
57 (45.6)
16 (70.0)
55.3 (±50.0)
83.0 (±37.8)
<0.001
0.62
Is inverting the tubes once an acceptable mixing method immediately after blood collection?
31 (24.8)
15 (15.96)
77.7 (±41.9)
84.0 (±36.8)
0.181
0.16
Is the IGRA test FDA approved for person who has been identified with TB disease?
93 (74.4)
69 (73.4)
24.5 (±43.2)
26.6 (±44.4)
0.640
0.05
Pre- and posttest comparison calculated by paired t-test in nurses who completed both pre- and posttests (N=94). Effect size was estimated using Cohen’s d method; QFT, QuantiFERON Gold In-Tube; PICC, peripherally inserted central catheter; IGRA, interferon-γ release assay; FDA, US Food and Drug Administration; TB, tuberculosis.
