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

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    Critical care nurses require specialized knowledge of atrial electrograms (AEGs). The Drake Atrial Electrogram Assessment Survey (DAEGAS) shows strong content validity but needs improvement in internal consistency and stability reliability for accurate AEG knowledge assessment.

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    Area of Science:

    • Nursing Education
    • Cardiovascular Nursing
    • Psychometrics

    Background:

    • Critical care nurses require specialized knowledge of atrial electrograms (AEGs) for postoperative cardiac surgery patients.
    • Existing instruments for assessing AEG knowledge lack a robust psychometric audit trail.

    Purpose of the Study:

    • To revise a previously validated instrument to assess knowledge of AEGs.
    • To evaluate the revised instrument's content validity, internal consistency, and stability reliability.

    Main Methods:

    • The Drake Atrial Electrogram Assessment Survey (DAEGAS) was revised to 19 items (13 knowledge, 6 interpretation).
    • Content validity was assessed by 6 AEG experts.
    • Reliability was tested on 76 critical care nurses using Cronbach's alpha and test-retest correlation.

    Main Results:

    • The DAEGAS achieved a content validity index of 0.93.
    • Initial Cronbach's alpha was 0.51 and test-retest reliability was 0.74.
    • After item removal, Cronbach's alpha improved to 0.60 and reliability remained 0.73.

    Conclusions:

    • The DAEGAS demonstrates strong content validity evidence.
    • Internal consistency and stability reliability did not meet the a priori criterion but are acceptable for a new instrument.
    • Further development is recommended to enhance the DAEGAS's psychometric properties for reliable critical care nurse AEG knowledge assessment.