Family Functioning in Obesity Treatment for Mexican Americans

NCT ID: NCT05120804

Last Updated: 2025-08-01

Basic Information

• Recruitment Status: RECRUITING
• Clinical Phase: NA
• Total Enrollment: 236 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2022-02-22
• Study Completion Date: 2026-07-31

Brief Summary

Mexican American families share similar elevated risks for obesity and obesity-related conditions, such as type 2 diabetes. Because negative family interactions and relationships (e.g., poor communication, high conflict, low emotional closeness) are associated with obesity treatment outcomes, this study tests a behavioral weight management intervention that provides relationship skills counseling to mothers and adult daughters. The goal is to improve family interaction patterns to buffer challenges and strengthen collaboration for eating and physical activity behaviors that support long-term weight management and thus provide an effective obesity treatment approach to address a major public health concern.

Detailed Description

Mexican American women are disproportionately affected by obesity and obesity-related conditions, such as type 2 diabetes. Obesity and diabetes are highly concordant in Mexican American families. Given the younger age of onset of diabetes in women with familial history, targeting mothers and their adult daughters for obesity treatment is warranted. From a family systems perspective, family-level approaches to obesity treatment can improve the adoption and maintenance of weight management behaviors. Including family members in treatment may also serve as a culturally salient intervention strategy as Mexican Americans endorse high level of familism. In contrast to traditional individual-level approaches to obesity treatment, a family-level approach grounded in familism would promote shared goals, collaborative problem solving, and communal coping when treating family members alongside each other. An important construct to consider when working with intergenerational Mexican American families is differences in acculturation, which may translate into differences in attitudes and behaviors. A wider gap in acculturation between parent and child has previously been associated with lower family functioning (e.g., poor communication, high conflict, low cohesion). However, interventions that promote bicultural competence by changing interactional patterns have been effective at improving family functioning. Hence, this study will conduct a randomized control trial testing the efficacy of a behavioral weight management intervention with brief and structured counseling on family functioning. Mexican American mothers and adult daughters (n=118 dyads) will be randomly assigned to receive standard behavioral treatment (SBT) or standard behavioral treatment plus relationship skills training (SBTR). Dyads participating in SBT or SBTR will attend 24 weekly sessions focused on nutrition and physical activity education along with behavior modification techniques. Dyads participating in SBTR will also receive experiential-based relationship skills training that draws from both general family systems concepts and behavioral family/couples therapy approaches to support familism, biculturalism, and communication competencies. The 12-month trial will consist of an intervention phase (1-6 months) and a maintenance phase (7-12 months). Assessments will be conducted at baseline and at the end of the intervention and maintenance phases. The primary outcome is weight loss. Secondary outcomes include treatment adherence (session attendance and self-monitoring records), physiological indicators of diabetes risk (hemoglobin A1c, waist circumference, and body fat percentage), health behaviors (eating and physical activity), psychological well-being (depression and perceived stress), and family functioning (subjective self-report and objective behavioral coding). Dyads in the SBTR group are expected to achieve greater improvements in primary and secondary outcomes than the STB group. Additionally, mediation by family functioning of intervention effects on primary and secondary outcomes will be examined.

Conditions

Obesity

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Standard behavioral treatment

Nutrition and physical activity education along with behavior modification techniques

Group Type: ACTIVE_COMPARATOR

Standard behavioral treatment

Intervention Type: BEHAVIORAL

Nutrition and physical activity education along with behavior modification techniques

Standard behavioral treatment plus relationship skills training

Nutrition and physical activity education along with behavior modification techniques plus brief and structured counseling on family functioning

Group Type: EXPERIMENTAL

Standard behavioral treatment plus relationship skills training

Intervention Type: BEHAVIORAL

Nutrition and physical activity education along with behavior modification techniques plus relationship skills training

Interventions

Standard behavioral treatment

Nutrition and physical activity education along with behavior modification techniques

Intervention Type: BEHAVIORAL

Standard behavioral treatment plus relationship skills training

Nutrition and physical activity education along with behavior modification techniques plus relationship skills training

Intervention Type: BEHAVIORAL

Other Intervention Names

SBT; SBTR

Eligibility Criteria

Inclusion Criteria

• Female
• 18-65 years of age
• Mexican or Mexican American
• Reside in San Diego County
• Body mass index of 25-45 kg/m2

Exclusion Criteria

• Unable to read and write in English or Spanish
• Pregnant or plan to become pregnant in the next year
• Have a physical limitation that makes exercise like walking difficult
• Currently participating in a weight loss program
• Underwent weight loss surgery
• Report a serious medical or psychological condition

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 65 Years
• Eligible Sex: FEMALE
• Accepts Healthy Volunteers: Yes

Sponsors

Becky Marquez

OTHER

Sponsor Role: lead

Responsible Party

Becky Marquez

Assistant Professor

Responsibility Role: SPONSOR_INVESTIGATOR

Locations

University of California San Diego

La Jolla, California, United States

Site Status: RECRUITING

University of California San Diego

La Jolla, California, United States

Site Status: RECRUITING

Countries

United States

Central Contacts

Becky Marquez, PhD

Role: CONTACT

bemarquez@ucsd.edu

858 246-2476

Facility Contacts

Becky Marquez, PhD MPH

Role: primary

Becky Marquez, PhD

Role: primary

Other Identifiers

210620

Identifier Type: -

Identifier Source: org_study_id