The Effect of Motivational Interviewing on Body Weight and Dietary Habits in Young Adult Women: A Randomized Controlled Study

NCT ID: NCT06685432

Last Updated: 2025-05-11

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 80 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2021-08-20
• Study Completion Date: 2023-01-01

Brief Summary

The purpose of the study is to evaluate the effect of applying web-based motivational interviewing technique to slightly overweight/obese individuals on individuals' body weight loss and gaining healthy eating habits.

Hypotheses:

1. The rate of decrease in body weight of individuals in the intervention group with motivational interviewing (MI) is higher than the control group.

2. Individuals in the intervention group with MI show more improvement in healthy eating behaviors than the control group.

3. The decrease in daily energy and fat intake of individuals in the intervention group with MI is higher than the control group.

4. The rate of vegetables and fruits in daily food consumption of individuals in the intervention group with MI is higher than the control group.

All participants were interviewed one-on-one in the one-hour intervention group (n=40) and the control group (n=40) for a total of 6 times in two weeks for three months (12 weeks) in a 30-minute video conference environment.

Depending on the participant in the intervention group that received motivational interviews, the interview period was extended if necessary.

Detailed Description

Participants were reached by snowball sampling method through an advertisement given on social media of a private diet center in Turkey. Participants were evaluated for suitability by phone interview. All volunteer participants were given detailed information about the study for one hour online. Online informed consent was obtained from participants who agreed to volunteer.

Before and at the end of the study, all participants were asked to fill out the Healthy Lifestyle Behavior Scale (HLBS), Food consumption frequency (which form), International Physical Activity Assessment Questionnaire (IPAQ-short form) and 24-h food consumption record for three consecutive days of the week (2 weekdays and 1 weekend) in an online data environment.

Participants were given portion training using the Turkish Ministry of Health's Turkish Nutrition Guide (TUBER). During the study (12 weeks), participants recorded 24-hour food consumption and physical activity records three days a week. The forms were sent to the researcher via online mail or social media (whatsapp) before the interview. Participants stated their height and were asked to measure their body weight on an empty stomach, without shoes and wearing light clothing, using a scale they used once a week, and their waist and hip circumferences were measured using a non-extensible tape measure.

In addition; the participants in the intervention group were given a medical nutrition treatment program along with motivational interview techniques. The control group was given only a medical nutrition program.

Daily energy needs in both groups were calculated using the Harris Benedict equation and a diet program was prepared to provide a weight loss of 0.5-1 kg per week. Accordingly, it was aimed to reduce the participant's daily energy intake by approximately 500-600 kcal, thus achieving a 10% kcal decrease in body weight. The diet program included 45-60% carbohydrates, 10-20% protein and 20-35% fat.

Measures Participant information form: All participants were female. In this study includes questions about marital status, people they live with, health status, use of nutritional supplements, smoking and alcohol use, number of meals, reasons for skipping meals, and whether they received help for weight loss.

Anthropometric measurements: height, waist, hip, body weight measurements were taken by the participant herself at the beginning and end of the study.

Healthy Lifestyle Behavior Scale (HLBS): The scale developed by Walker et al. measures the individual's health-enhancing behaviors related to a healthy lifestyle. The lowest total score obtained from the scale is 52, the highest total score is 208.

Food Consumption Frequency:

For each food, the expressions "every meal", "every day", "1-2 times a week", "3-4 times a week", "5-6 times a week", "2-3 times a month", "once a month or less often" were used and the consumption amounts were questioned.

Food consumption record:

International Physical Activity Assessment Questionnaire (IPAQ) Short Form:

It is used to determine the physical activity levels and sedentary lifestyles of adults.

Conditions

Weight Loss; Obese Women

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

intervention

Group Type: EXPERIMENTAL

Diet

Intervention Type: BEHAVIORAL

The effect of motivational interviewing techniques was examined in addition to diet treatment. The effect of motivational interviewing techniques on anthropometric measurements before and after the study was evaluated. The participants' indecisiveness was investigated and a self-directed "change conversation" was presented. Behavior change strategies including determining positive and negative aspects, using importance and confidence scales, and setting the agenda were applied by the researcher.

In the interviews that included motivational interviewing techniques:

1. A participant-centered interview was conducted by collaborating with the participant.

2. The researcher was impartial and did not assume the role of an expert.

3. At the beginning of the interview, an evaluation of what was discussed in the previous week was made.

4. First of all, an attempt was made to determine the agenda according to the topic the participant wanted to discuss.

5. The importance scale was used (1-10).

Interventions

Diet

The effect of motivational interviewing techniques was examined in addition to diet treatment. The effect of motivational interviewing techniques on anthropometric measurements before and after the study was evaluated. The participants' indecisiveness was investigated and a self-directed "change conversation" was presented. Behavior change strategies including determining positive and negative aspects, using importance and confidence scales, and setting the agenda were applied by the researcher.

In the interviews that included motivational interviewing techniques:

1. A participant-centered interview was conducted by collaborating with the participant.

2. The researcher was impartial and did not assume the role of an expert.

3. At the beginning of the interview, an evaluation of what was discussed in the previous week was made.

4. First of all, an attempt was made to determine the agenda according to the topic the participant wanted to discuss.

5. The importance scale was used (1-10).

Intervention Type: BEHAVIORAL

Other Intervention Names

motivational interviewing

Eligibility Criteria

Inclusion Criteria

1. Gender : Female,

2. Between 19-50 years of age,

3. BMI ≥25.0 kg/m2,

4. No condition that would prevent movement,

5. No chronic disease (e.g. cardiovascular problems, neurological diseases, chronic respiratory diseases, diabetes, etc.)

6. Individuals who signed the consent form and agreed to participate in the study were included.

Exclusion Criteria

1. Pregnant or planning to become pregnant,

2. Menopausal,

3. Breastfeeding,

4. Chronic disease (e.g. cardiovascular problems, neurological diseases, chronic respiratory diseases, diabetes, etc.)

5. History of eating disorders,

6. Not simultaneously following another nutrition counseling program,

7. History of bariatric surgery,

8. Using medications that affect body weight control,

9. Abusing drugs and alcohol,

10. Having voluntary vomiting behavior more than once a month,

11. Purgative habits (use of laxatives, diuretics, etc.),

12. On a special diet,

14. Gender :Male

• Minimum Eligible Age: 19 Years
• Maximum Eligible Age: 50 Years
• Eligible Sex: FEMALE
• Accepts Healthy Volunteers: Yes

Sponsors

Sibel ERDEM

OTHER

Sponsor Role: lead

Responsible Party

Sibel ERDEM

Lecturer

Responsibility Role: SPONSOR_INVESTIGATOR

Principal Investigators

SİBEL ERDEM, LECTURER

Role: PRINCIPAL_INVESTIGATOR

university

PELİN BİLGİÇ, ASSOC. PROF.

Role: STUDY_DIRECTOR

university

Locations

Mugla Sitki Kocman Unıversity

Muğla, Fethiye, Turkey (Türkiye)

Countries

Turkey (Türkiye)

Other Identifiers

E-72855364-050.01.044-299714

Identifier Type: -

Identifier Source: org_study_id