Data analysis
UC
RECRUITMENT
Study feasibility was evaluated using recruitment (number of patient-caregiver dyads that consented divided by the total number of dyads approached) and retention (the percentage of dyads retained during the study period) rates and based on the hypothesis test for recruitment and retention rates (pre-set goals: both at 60%). We examined the usability and satisfaction survey data, as well as PRISMS and device usage data with means and standard deviations. Thematic summaries were derived from the qualitative data collected from participants during post-exit interviews of the participants conducted in both the PRISMS and UC groups.To evaluate initial efficacy, we used t-test to examine the group differences in the score changes between the T1 and T2 surveys. All randomized participants were included with an intent-to-treat analysis. We also examined the demographic differences between the PRISMS and UC groups using the Fisher test (categorical variables) and the unpaired Student’s t-test (continuous variables). Considering this is a pilot study and the small sample size, we did not adjust for multiple comparisons. We used Cohen's d to assess the clinically meaningful differences (d = 0.2 small effect; d = 0.5 medium effect; and d > 0.8 large effect). All statistical analyses were performed using SAS (version 9.4, SAS Institute, Inc., Cary, NC) at the 0.05 significance level [