Background
Existing assessment tools for competence in critical care ultrasound (CCUS)
have limited scope and interrupt clinical workflow. The framework of
entrustable professional activities (EPAs) is well suited to developing an
assessment tool that is comprehensive and readily integrated into the
intensive care unit (ICU) training environment.
Objective
This study sought to design an EPA-based tool to assess competence in CCUS
for pulmonary and critical care fellows and to assess the validity and
reliability of the tool.
Methods
Eight experts in CCUS met to define the core EPAs for CCUS. A nominal group
technique was used to reach consensus. An assessment tool was created based
on the EPAs with a modified Ottawa entrustability scale. Trained faculty
evaluated pulmonary and critical care fellows using this tool in the ICU
over a 6-month study period at a single institution. An assessment of
validity of the EPA-based tool is made with four sources of validity
evidence: content, response process, reliability, and relation to other
variables. Reliability and response process data were generated using
generalizability theory analysis to estimate sources of variance in
entrustment scores. Analysis of response process validity and validity by
relation to other variables was performed using regression models.
Results
Fifty-four assessments were recorded during the study period, conducted on 23
trainees by 13 faculty. Content validity of the tool was demonstrated using
expert consensus and published guidelines from critical care societies to
define the EPAs. Response process validity was demonstrated by the low
variance in entrustment scores due to evaluators (0.086 or 6%) and
high agreement between score and trainee self-assessment (regression
coefficient, 0.82;
P
< 0.0001).
Reliability was demonstrated by the high “true” variance in
entrustment score attributable to the trainee: 0.674 or 45%. Validity
by relation to other variables was demonstrated using regression analysis to
show correlation between entrustment score and the number of times a fellow
has performed an EPA (regression coefficient, 0.023;
P
< 0.0001).
Conclusion
An EPA-based assessment tool for competence in CCUS was created. We obtained
sufficient validity evidence on three of the diagnostic EPAs. Procedural
EPAs were infrequently assessed, limiting generalizability in this
subgroup.