Motivational Interviewing for Overweight and Obese Adults at Healthy Life Centers

NCT07745231 | Not Yet Recruiting

• 1 other identifier: SAU-PHD-MI-OB-2026
• Study Type: interventional
• Target: 54
• Locations: 1 country
• Sites: 3

Brief Summary

Overweight and obesity are major public health problems associated with increased morbidity and mortality. Motivational interviewing is a patient-centered counseling approach that may improve lifestyle behaviors and weight management. This randomized controlled trial aims to evaluate the effect of motivational interviewing on anthropometric measurements, eHealth literacy, and healthy eating attitudes among overweight and obese adults attending Healthy Life Centers in Sakarya, Türkiye. Participants will be randomly assigned to either a motivational interviewing intervention group or a routine nutrition counseling control group. Outcomes will be assessed at baseline and after the intervention.

Conditions

Overweight; Obesity

Keywords

Motivational Interviewing; eHealth Literacy; Healthy Eating; Nutrition Counseling; Weight Management; Randomized Controlled Trial; Primary Health Care; Healthy Life Center; Behavioral Intervention

Outcome Measures

Primary Outcomes (1)

• Change in Body Weight

  Body weight (kg) will be measured at baseline and after completion of the 12-week intervention using standardized anthropometric procedures. The primary outcome is the change in body weight from baseline to post-intervention.

  Baseline and 12 weeks

Secondary Outcomes (5)

• Change in Body Mass Index (BMI)

  Baseline and 12 weeks

• Change in Waist Circumference

  Baseline and 12 weeks

• Change in Waist-to-Hip Ratio

  Baseline and 12 weeks

• Change in eHealth Literacy

  Baseline and 12 weeks

• Change in Healthy Nutrition Attitudes

  Baseline and 12 weeks

Study Arms (2)

Experimental Group

EXPERIMENTAL

Participants will receive four structured motivational interviewing sessions in addition to routine nutrition counseling provided by Healthy Life Centers. The first and fourth sessions will be conducted face-to-face, and the second and third sessions will be delivered by telephone or online.

Behavioral: Motivational Interviewing; Behavioral: Routine Nutrition Counseling

Control Group

ACTIVE COMPARATOR

Participants will receive routine nutrition counseling according to standard Healthy Life Center practice without motivational interviewing.

Behavioral: Routine Nutrition Counseling

Interventions

Motivational Interviewing BEHAVIORAL

Participants will receive four structured motivational interviewing sessions in addition to routine nutrition counseling. The first and fourth sessions will be delivered face-to-face, while the second and third sessions will be conducted by telephone or online. The intervention is based on motivational interviewing principles and aims to improve healthy eating behaviors, eHealth literacy, and anthropometric outcomes among overweight and obese adults.

Experimental Group

Routine Nutrition Counseling BEHAVIORAL

Participants will receive routine nutrition counseling provided by Healthy Life Centers according to standard clinical practice without motivational interviewing.

Control Group; Experimental Group

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Adults aged 18 years and older.
• Body mass index (BMI) ≥25 kg/m² (overweight or obese).
• Registered at one of the participating Healthy Life Centers in Sakarya Province.
• Able to communicate in Turkish.
• Willing to participate and provide written informed consent.
• Able to participate in face-to-face and telephone/online counseling sessions.

You may not qualify if:

• Pregnancy or breastfeeding.
• Severe psychiatric disorders or cognitive impairment affecting participation.
• Serious medical conditions preventing participation in lifestyle counseling.
• Currently participating in another behavioral or weight management intervention.
• Inability to complete follow-up assessments.
• Withdrawal of informed consent at any time.

Sponsors & Collaborators

• Sakarya University: lead
• Sakarya Provincial Health Directorate: collaborator

Study Sites (3)

Adapazarı Healthy Life Center

Sakarya, Adapazarı, Turkey (Türkiye)

Location

Sapanca Healthy Life Center

Sakarya, Sapanca, Turkey (Türkiye)

Location

Serdivan Healthy Life Center

Sakarya, Serdivan, Turkey (Türkiye)

Location

MeSH Terms

Conditions

Overweight; Obesity

Interventions

Motivational Interviewing

Condition Hierarchy (Ancestors)

Overnutrition; Nutrition Disorders; Nutritional and Metabolic Diseases; Body Weight; Signs and Symptoms; Pathological Conditions, Signs and Symptoms

Intervention Hierarchy (Ancestors)

Directive Counseling; Counseling; Mental Health Services; Behavioral Disciplines and Activities; Health Services; Health Care Facilities Workforce and Services

Central Study Contacts

Rıdvan ATICI, MSc

CONTACT

5335111233; ridvanatici@yahoo.co.uk

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: OUTCOMES ASSESSOR
• Masking Details: Outcome assessors will be blinded to group allocation to minimize assessment bias.
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Model Details: Participants will be randomly assigned in a 1:1 ratio to either a motivational interviewing intervention group or a routine nutrition counseling control group. The intervention group will receive four structured motivational interviewing sessions in addition to routine care, while the control group will receive routine nutrition counseling only. Both groups will be followed in parallel throughout the study.

Study Record Dates

• First Submitted: July 30, 2026
• First Posted: August 4, 2026
• Study Start (Estimated): September 1, 2026
• Primary Completion (Estimated): January 1, 2027
• Study Completion (Estimated): April 1, 2028
• Last Updated: August 4, 2026

Record last verified: 2026-07

Locations

TU (3)