Digital Technology Use, Digit Ratio, and Handgrip Strength in University Students

This observational cross-sectional study examined associations among second-to-fourth digit ratio, handgrip strength, problematic smartphone-use symptoms, problematic Internet-use symptoms, and self-reported smartphone usage time in university students from different regional backgrounds. The analytic sample included 173 students aged 17-26 years from Turkish, Middle Asian, African, and Asian regional backgrounds. Participants completed validated self-report scales for smartphone-use and Internet-use symptoms, and underwent anthropometric, hand morphology, and handgrip strength measurements. The study did not involve randomization, treatment assignment, intervention, or follow-up.

NCT Number	NCT07694960
Lead Sponsor	Inonu University Collaborators: Gaziantep Islam Science and Technology University, Bandırma Onyedi Eylül University
Conditions	Problematic Smartphone Use, Internet Addiction, Healthy Volunteers
Enrollment	173 participants
Start Date	2022-12-01
Primary Completion	2023-05-30 (estimated)
Study Completion	2023-05-30 (estimated)
Updated on ClinicalTrials.gov	2026-07-10