A Randomized Controlled Trial of the Effect of a Text Message Intervention on Obesity Improvement in Adult Male Workers Under Age 40 (Pilot Study)

A Randomized Controlled Trial of the Effect of a Text Message Intervention on Obesity Improvement in Adult Male Workers Under Age 40 (Pilot Study) - A Randomized Controlled Trial of the Effect of a Text Message Intervention on Obesity Improvement in Adult Male Workers Under Age 40 (Pilot Study)

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000054203

Enrollment

Registered

2024-04-24

Start date

2024-04-30

Completion date

Unknown

Last updated

2026-06-29

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

Conditions

obesity

Interventions

Intervention group - at the start, knowledge about obesity and lifestyle modification is provided by brochures

health guidance for obesity modification is provided by text message delivery three times a week for three months. The intervention is one-way with text message delivery. Control group - at the star

Eligibility

Sex/Gender

Male

Inclusion criteria

Inclusion criteria: 1) Male workers aged between 18 and 40 years who live in Japan and have a BMI of 25 or more. 2) Have no health problems, other than obesity. 3) Own a smartphone or mobile phone and be able to use a short email service and access the internet. 4) Able to read and write Japanese and understand the research. 5) Have a workplace health check-up.

Exclusion criteria

Exclusion criteria: 1) Working night shifts. 2) Cannot communicate in Japanese. 3) Are receiving regular medical care or have a pre-existing medical condition that prevents them from eating a healthy diet or participating in physical activity and are in hospital.

Design outcomes

Primary

Measure	Time frame
Evaluate the effectiveness of the intervention. Percentage of weight loss achieved at the time of evaluation from baseline. Weight loss attainment should be targeted at 3% of body weight.	—

Secondary

Measure	Time frame
1)Baseline, 3 months later: BMI, abdominal circumference, Weight Efficacy Life-Style Questionnaire, New General Self-Efficacy Scale Japanese version : NGSE-J, Stages of Change regarding lifestyle improvement initiatives Change 2)Three months later: intervention group only. Study subjects are asked to rate their satisfaction, utilisation and recommendation to others on a five-point scale and an open-ended questionnaire. Frequency, timing and duration of message delivery will be assessed. 3) At baseline, one month, two months and three months Evaluate the SMS reachability rate and URL click rate from the SMS platform and the number of accesses from the research website.	—

Measure

Time frame

1)Baseline, 3 months later: BMI, abdominal circumference, Weight Efficacy Life-Style Questionnaire, New General Self-Efficacy Scale Japanese version : NGSE-J, Stages of Change regarding lifestyle improvement initiatives Change 2)Three months later: intervention group only. Study subjects are asked to rate their satisfaction, utilisation and recommendation to others on a five-point scale and an open-ended questionnaire. Frequency, timing and duration of message delivery will be assessed. 3) At baseline, one month, two months and three months Evaluate the SMS reachability rate and URL click rate from the SMS platform and the number of accesses from the research website.

—

Countries

Japan

Contacts

Public ContactChie Tomotake

Mejiro University Department of Nursing

tomotake@mejiro.ac.jp0787972132

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026