Development and Psychometric Testing of the Drake Atrial Electrogram Assessment Survey: DAEGAS©

Friday, March 27, 2020

Jeanette Drake, PhD, ACNP-BC
Cizik School of Nursing, University of Texas Health Science Center at Houston, Houston, TX, USA
Sandra K. Hanneman, PhD
Department of Research, University of Texas Health Science Center at Houston Cizik School of Nursing, Houston, TX, USA

Purpose: Critical care nurses (CCNs) who care for cardiac surgery patients need specialty knowledge. An inadequate audit trail exists for psychometric performance of instruments to measure CCN knowledge of atrial electrograms. A 29-item survey previously pilot tested with a convenience sample of CCNs in the Pacific Northwest had a Kuder-Richardson-20 estimate of internal consistency of .75. The survey was revised to 19 items, named the Drake Atrial Electrogram Assessment Survey (DAEGAS), and assessed for content validity evidence (content validity index = .93).

In the proposed study, the DAEGAS will be assessed for evidence of internal consistency (Cronbach’s α) and stability (correlation coefficient, r) reliability and construct validity. The principal investigator will revise the instrument if the proposed testing does not meet a priori criteria.

Methods: The DAEGAS will be pilot tested (internal consistency and test/retest with 2-week interval) with local CCNs (N = 30). Then a national sample (N = 5000), randomly selected by the American Association of Critical Care Nurses, will be invited to complete the DAEGAS for internal consistency and construct validity testing. The a priori criteria will be > .80 for α and r, and factor loading > .30, cross-loading > .20, and > 3 items per factor. Analyses will include descriptive statistics for demographics, Cronbach’s α, r, and exploratory factor analysis with principal axis factoring and orthogonal and oblique rotations. Evidence of reliability and validity will be established if a priori criteria are met.

Results: Data collection is underway.

Conclusion: If adequate evidence of reliability and validity is found, the DAEGAS could allow for reliable and valid assessment of CCN knowledge of atrial electrograms. Providing bedside nurses with AEG training based on reliable and valid assessment of their knowledge may be instrumental in creating positive outcomes for patients and staff that potentially include improved patient outcomes, lower lengths of ICU and hospital stay, and cost of hospitalization.