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This is not unexpected because the small number of participants and the accompanying lack of statistical power limit the statistical inference in this study design. Furthermore, given the observational nature of the study, we cannot attribute that the changes observed were related to the deployment of the platform.
JMIR Aging 2020;3(2):e15600
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We hypothesis a moderate between-groups effect size (d=0.5), so with 80% power and alpha=.05, a sample of 64 individuals in the intervention group and 64 in the usual care group is required for the t test. Adjusting for ANCOVA by sqrt (1-p2), where the p is the conservative correlation of 0.5 between repeated measures [39], results in a sample of 55 in each group. To account for dropout, 60 Pw D-caregiver dyads will need to be recruited for each group.
JMIR Res Protoc 2019;8(8):e13280
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