Objective: Evaluate the internal consistency and temporal stability of advance directives (ADs) generated by an interactive, online computer program.
Methods: 33 participants completed the program at three visits, 2 weeks apart. Agreement rates were calculated for the component of the AD. The test-retest method was used to examine the temporal stability of the component which contains five clinical scenarios.
Results: remained stable with 94% selecting the identical response at each visit. For the scale significant variations in test-retest correlations existed (ie, ρ=0.32-0.78, between time points 1 and 2); however within scenario, correlations did not significantly vary between time points. Temporal stability was lower in the scale compared with s (average ρ=0.59, between time points 1 and 2; and ρ=0.75, between time points 2 and 3).
Conclusions: ADs generated by an online decision aid demonstrate good temporal stability, with highest stability for and moderate stability for regarding medical treatments in specific clinical scenarios. Internal consistency for wish for treatment across all time points and scenarios was high (Cronbach α>0.90).
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| http://dx.doi.org/10.1136/bmjspcare-2014-000814 | DOI Listing |
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