Lifestyle Intervention in Overweight and Obese Pregnant Hispanic Women

Study Results

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Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

232 participants

Study Classification

INTERVENTIONAL

Study Start Date

2014-06-30

Study Completion Date

2020-07-31

Brief Summary

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The overall goal of this randomized controlled trial is to test the efficacy of a culturally and linguistically modified, individually tailored lifestyle intervention to reduce excess gestational weight gain (GWG), increase postpartum weight loss, and improve maternal metabolic status among overweight/obese Hispanic women.

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Detailed Description

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The overall goal of this randomized controlled trial is to test the efficacy of a culturally and linguistically modified, individually tailored lifestyle intervention to reduce excess gestational weight gain (GWG), increase postpartum weight loss, and improve maternal metabolic status among overweight/obese Hispanic women. Specific aims are to evaluate the impact of the intervention on 1) GWG and postpartum weight loss, 2) pregnancy and postpartum biomarkers of insulin resistance (i.e., glucose, insulin, HbA1c, HOMA, leptin, adiponectin), 3) postpartum biomarkers of cardiovascular risk (i.e., blood lipids, blood pressure), 4) offspring outcomes (i.e., anthropometric measures and biomarkers of insulin resistance), and 5) to evaluate the cost-effectiveness of the intervention per average incremental improvement in the outcome variables. Overweight/obese Hispanic women will be recruited in early pregnancy (around 10 wks gestation) and randomly assigned to a Lifestyle Intervention (n=150) or a Comparison Health and Wellness (control) Intervention (n=150). The intervention will utilize exercise (R01NR011295) and dietary intervention materials (R18DK067549) culturally adapted for Hispanics and shown to be efficacious in our previous controlled trials in this ethnic group. Multimodal contacts (i.e., in-person, telephone counseling, and mailed print-based materials) will be used to deliver the intervention during pregnancy (\~12 wks gestation to delivery) continuing into postpartum (\~6 wks to 6 mos postpartum); follow-up will continue for one year postpartum. Targets of the intervention are to achieve Institute of Medicine Guidelines for GWG and postpartum weight loss; ACOG guidelines for physical activity through increasing walking and developing a more active lifestyle; and reduction in total calories by following a balanced healthy diet in compliance with American Diabetes Association guidelines. The intervention draws from Social Cognitive Theory and the Transtheoretical Model and includes strategies for partner and/or family support to address the specific social, cultural, and economic challenges faced by underserved Hispanic women. Measures of compliance will include actigraphs and Hispanic food frequency questionnaires. The proposed project builds upon the expertise of the investigative team in conducting randomized controlled trials of exercise interventions among Hispanic pregnant women (R01 DK074876) and dietary interventions among low-income Hispanics with type 2 diabetes (R18 DK0658850) and can readily be translated into clinical practice in underserved and minority populations.

Conditions

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Diabetes

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

DOUBLE

Investigators Outcome Assessors

Study Groups

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Lifestyle Intervention

Stage-matched physical activity and diet intervention materials and health education.

Group Type EXPERIMENTAL

Lifestyle Intervention

Intervention Type BEHAVIORAL

Health and Wellness

HW served as the comparison group and received the same number of in-person sessions, telephone calls, and mailings at the same time points as LI. Content was limited to general information available to the public from the ACOG and the American Academy of Pediatrics and did not mention exercise behavior change.

Group Type NO_INTERVENTION

No interventions assigned to this group

Interventions

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Lifestyle Intervention

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

* Hispanic women
* Overweight or obese before pregnancy (BMI \>25 kg/m2)
* 16-45 years old

Exclusion Criteria

* prepregnancy BMI \<25 kg/m2
* history of type 2 diabetes, heart disease, or chronic renal disease
* contraindications to postpartum participation in moderate physical activity or a low-fat/high-fiber diet (e.g., Crohn's disease, ulcerative colitis)
* inability to read English or Spanish at a 6th grade level
* \>16 wks gestation
* current medications which adversely influence glucose tolerance
* not planning to continue to term or deliver at the study site
* pregnant with twins or triplets

Minimum Eligible Age

16 Years

Maximum Eligible Age

45 Years

Eligible Sex

FEMALE

Accepts Healthy Volunteers

Yes