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The formula used to calculate energy expenditure was as follows: energy expenditure (kcal) = 3.88 × VO2 – 0.32 L/g × Kexcr (g) + 1.08 × VCO2 - 1.57 × N. VO2 and VCO2 are the volumes of oxygen consumed and carbon dioxide produced, respectively, in liters. Kexcr refers to ketones excreted in grams. N refers to the 24-hour urinary nitrogen excretion in grams.
Sleeping energy expenditure was determined as the lowest energy expenditure over a continuous 180-minute period between midnight and 6 AM.
JMIR Res Protoc 2025;14:e74999
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A random subset (n=18) of participants also consented to wear an Acti Graph wristwatch (Acti Graph w GT3x-BT triaxial accelerometer; Acti Graph LLC) for the week. The Acti Graph was only worn by a subset of the participants because of the limited availability of these wrist wearables.
An a priori power analysis was conducted for the broader microrandomized trial using the MRTSample Size R package [15].
JMIR Form Res 2025;9:e67455
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Social-Media-Based Mental Health Interventions: Meta-Analysis of Randomized Controlled Trials
During the full-text review stage, the top 5 reasons for exclusion included: wrong study design (n=345), not social media-based (n=112), absence of a negative mental health outcome (n=77), fewer than 30 participants per condition (n=73), and social media abstinence interventions (n=35). Finally, 17 studies were included in this meta-analysis. Table 1 presents the main characteristics of the included studies.
PRISMA (Preferred Reporting Items for Systematic reviews and Meta-Analyses) diagram.
J Med Internet Res 2025;27:e67953
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Consequently, the following passive and active authentication protocol was designed specifically for use on the remote advertising sample, and descriptive results reflect checks and findings only from this group (N=1069).
In the following authentication protocol, active checks are defined as those that involve direct effort and attention by a research staff member and result in a pass or a failure.
JMIR Res Protoc 2025;14:e69956
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Development of a Sham Smartphone App for Opioid Use Disorder: Acceptability and Suitability Study
JMIR Form Res 2025;9:e71105
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The median diabetes duration and age of diabetes onset were 14.0 years and 37.1 years, respectively, with 12% (11/91) of participants aged
Baseline demographic variables for the telemonitoring study group and non-telemonitoring study group (N=206).
a TSG: telemonitoring study group.
b T1 DM: type 1 diabetes mellitus.
c T2 DM: type 2 diabetes mellitus.
JMIR Diabetes 2025;10:e68214
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After dropping missing responses (n=48), the total sample size included in the analysis was 1158 parent respondents for a
The survey sample comprised 753 (55%) females, 614 (57%) non-Hispanic Whites, and 948 (81%) metropolitan respondents (Table 1). There were 125 (12%) parents who reported internet worry, 152 (13%) who reported unreliable internet experience, and 76 (7%) who reported both.
J Med Internet Res 2025;27:e69304
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