Smartphone abstinence in students: A controlled interventional study.

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

DRKS

Registry ID

DRKS00010175

Enrollment

285

Registered

2016-03-16

Start date

2016-04-04

Completion date

Unknown

Last updated

2025-04-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Influence of smartphone and digital media use in adolescents

Interventions

Group 1: Smartphone and digital media abstinence for four weeks Group 2: waiting group

Eligibility

Sex/Gender

All

Age

10 Years to 18 Years

Inclusion criteria

Inclusion criteria: students of class 6-10, voluntary basis

Exclusion criteria

Exclusion criteria: no smartphone

Design outcomes

Primary

Measure	Time frame
Screentime (self report in diary, whole period), physical activity and sleep duration (continuous tracking with fitness-tracker, whole period), executive functions (computer tests, four measurement periods) cortison and DHEA (hair samples, three measurement periods) BMI, blood pressure, heart rate (four measurement periods), PANAS (self rating, four measurement periods), teacher ratings ( four measuremente periods), performance in school (school report in february and in july) The four measurement periods take place one week before and one week after each of the two intervention periods.	—

Measure

Time frame

Screentime (self report in diary, whole period), physical activity and sleep duration (continuous tracking with fitness-tracker, whole period), executive functions (computer tests, four measurement periods) cortison and DHEA (hair samples, three measurement periods) BMI, blood pressure, heart rate (four measurement periods), PANAS (self rating, four measurement periods), teacher ratings ( four measuremente periods), performance in school (school report in february and in july) The four measurement periods take place one week before and one week after each of the two intervention periods.

—

Countries

Germany

Contacts

Public ContactManfred Spitzer

Klinik für Psychiatrie und Psychotherapie IIIUniversitätsklinikum Ulm

manfred.spitzer@uni-ulm.de0731 500-61400

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 4, 2026