Obesity, Overweight
Conditions
Keywords
Motivational Interviewing, eHealth Literacy, Healthy Eating, Nutrition Counseling, Weight Management, Randomized Controlled Trial, Primary Health Care, Healthy Life Center, Behavioral Intervention
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.
Detailed description
Overweight and obesity are increasing worldwide and contribute substantially to chronic diseases, reduced quality of life, and healthcare costs. Although lifestyle modification remains the cornerstone of obesity management, long-term adherence to healthy eating and physical activity recommendations remains challenging. Motivational interviewing is an evidence-based behavioral counseling method designed to strengthen an individual's motivation and commitment to behavior change. This study is a single-blind, parallel-group, randomized controlled trial conducted in Healthy Life Centers affiliated with the Sakarya Provincial Health Directorate in Türkiye. Eligible adults with overweight or obesity will be randomly allocated to either an intervention group receiving four structured motivational interviewing sessions in addition to routine nutrition counseling or a control group receiving routine nutrition counseling alone. Anthropometric measurements, including body weight, height, body mass index, waist circumference, hip circumference, and waist-to-hip ratio, will be collected. Participants will also complete the eHealth Literacy Scale (eHEALS) and the Healthy Eating Attitude Scale before and after the intervention. The primary objective is to determine whether motivational interviewing improves anthropometric outcomes compared with routine care. Secondary objectives include evaluating changes in eHealth literacy and healthy eating attitudes. Findings from this study may contribute to the development of evidence-based behavioral interventions for overweight and obesity management in primary healthcare settings.
Interventions
BEHAVIORALMotivational Interviewing
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.
BEHAVIORALRoutine Nutrition Counseling
Participants will receive routine nutrition counseling provided by Healthy Life Centers according to standard clinical practice without motivational interviewing.
Sponsors
Sakarya University
Sakarya Provincial Health Directorate
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)
Masking description
Outcome assessors will be blinded to group allocation to minimize assessment bias.
Intervention model description
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.
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* 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.
Exclusion criteria
* 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.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change in Body Weight | Baseline and 12 weeks | 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. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Change in Body Mass Index (BMI) | Baseline and 12 weeks | Body mass index will be calculated as weight in kilograms divided by height in meters squared. |
| Change in Waist Circumference | Baseline and 12 weeks | Waist circumference will be measured using standardized anthropometric techniques. |
| Change in Waist-to-Hip Ratio | Baseline and 12 weeks | Waist-to-hip ratio will be calculated from waist and hip circumference measurements. |
| Change in eHealth Literacy | Baseline and 12 weeks | eHealth literacy will be assessed using the Turkish version of the eHealth Literacy Scale (eHEALS). |
| Change in Healthy Nutrition Attitudes | Baseline and 12 weeks | Healthy nutrition attitudes will be evaluated using the Healthy Nutrition Attitude Scale (SBITO). |
Countries
Turkey (Türkiye)
Contacts
CONTACTRıdvan ATICI, MSc
Outcome results
None listed