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Digital Mental Health Interventions for Young People Aged 16-25 Years: Scoping Review
J Med Internet Res 2025;27:e72892
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Calculation of the sample size was determined using the Cochran sample size determination formula [21], mathematically expressed as:
n = z²pq/d²
Where n is the minimum sample size, z is the standard normal deviate at a 95% CI (1.96), p is the proportion of female undergraduates who are aware of contraception (0.84) [22], q is the alternate probability (1 – 0.84 = 0.16), and d is the precision (5%=0.05). Therefore, 206 was the estimated sample size.
JMIRx Med 2025;6:e56135
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Podcasts in Mental, Physical, or Combined Health Interventions for Adults: Scoping Review
J Med Internet Res 2025;27:e63360
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Power analyses were focused on the ability to detect a medium effect size (Cohen d=0.50) at postcondition in the context of a 2-level random coefficients HLM. Given that the primary contrast of interest would be that between CBI and the other study conditions, calculations were focused on detecting significant differences between two active conditions. Where study parameters in this 2-level model were not yet known, we used standard values and varied parameters to approximate an effective sample size.
JMIR Res Protoc 2025;14:e65970
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Cohen d effect sizes for all effects irrespective of statistical significance are reported and interpreted as small (d≥0.3), medium (d≥0.5), and large (d≥0.8) [33]. Odds ratios and 95% CIs are presented for logistic regression results.
J Med Internet Res 2025;27:e66465
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