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Effectiveness of an mHealth Program on Reducing Blood Pressure Among Young Adults With Prehypertension: Protocol of a Pragmatic Cluster Randomized Controlled Trial

Effectiveness of an mHealth Program on Reducing Blood Pressure Among Young Adults With Prehypertension: Protocol of a Pragmatic Cluster Randomized Controlled Trial

In the equation, n is the sample size required, Z1-α/2 is the desired confidence level (ie, for a 95% confidence level, Z1-α/2=1.96), Z1-β is the power of the test (ie, for a power of 80%, Z1-β=0.84), σ² is the population variance (ie, square of the SD), m is the number of groups being compared, ρ is the correlation coefficient between groups, and d is the minimum detectable difference. Accounting for a 20% dropout rate, the final sample size was 43 participants per group.

Melita Sheilini, H Manjunatha Hande, Nagaraja Ravishankar, Akshay M J, Jyothi Nayak, Ramesh Chandrababu

JMIR Res Protoc 2025;14:e67216