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The PROMIS website also gives the mean and SD of the T-score metric (mean 50, SD 10). Power calculations for this primary hypothesis were performed using the SAS procedure PROC GLMPOWER (SAS Version 9.4) [62]. Results indicated that 282 participants after attrition would be needed for 80% power (P
With regard to power for moderation analyses, we ran a sensitivity analysis to compute the smallest effect size our study would be powered to find using 280 given 4 groups (eg, 2 study arms × 2 genders).
JMIR Res Protoc 2025;14:e64449
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The PMIS (Pearson r=−0.76; P
As we examined the sensitivity and specificity data to choose cut scores, we chose to favor sensitivity to minimize missing individuals with true disease in this sample of patients considered high risk because of their cognitive concerns. The cut scores for a positive result on the 5-Cog components were as follows: PMIS ≤6 (range 0-8), Symbol Match ≤25 (range 0-65), and s MCR >5 (range 0-7).
JMIR Res Protoc 2025;14:e60471
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In “Effect of Harm Anchors in Visual Displays of Test Results on Patient Perceptions of Urgency About Near-Normal Values: Experimental Study” (J Med Internet Res 2018;20(3):e98) the authors noted one error.
In Table 2, the row labels for the 3 rows under “Extreme results” have been revised.
J Med Internet Res 2025;27:e74908
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No direct relationship was observed between “challenges in providing VCP” and “enhancing control” (r=0.16; P=.15). However, the factor “features to enhance TR” was moderately correlated with “enhancing control” (r=0.46; P
Eigenvalue of the 3 factors.
a Not available.
Scree plot of the 4 factors loaded.
The 3 factors loaded.
a VCP: videoconference psychotherapy.
b TR: therapeutic relationship.
c Not applicable.
J Med Internet Res 2025;27:e66904
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On the basis of a power analysis with the G*Power software [22] and starting from a 2-sided t test with a significance level of α=.05 and a test power of 80%, we determined that a medium-size effect of approximately Cohen d=0.64 can be achieved with a corresponding sample size of 39 participants per group.
JMIR Res Protoc 2025;14:e63098
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