De Por Vida: A Diabetes Risk Reduction Intervention for Hispanic Women
Primary Purpose
Diabetes, Weight Loss, PreDiabetes
Status
Completed
Phase
Not Applicable
Locations
Study Type
Interventional
Intervention
Behavioural Lifestyle Intervention
Sponsored by
About this trial
This is an interventional prevention trial for Diabetes focused on measuring Culturally-tailored, Weight Loss, Diabetes, Women, Hispanic, Obesity
Eligibility Criteria
Inclusion Criteria:
- All participants will be patients who receive their primary medical care at the Virginia Garcia Memorial Health Center (VGMHC)
- Self-identified as Spanish-speaking Latina or Hispanic
- Female
- Age 18 and older
- BMI greater than or equal to 27kg/m2
Classified as diabetic or prediabetic in the electronic medical record by at least one of the following:
- Fasting plasma glucose ≥ 100
- 2-h post glucose level on the 75-g oral glucose tolerance test ≥ 140-199 mg/dL (7.8-11.0 mmol/L)
- Hemoglobin HBA1c ≥ 5.7
- Diagnosis of diabetes in patient's medical chart
- Diagnosis of prediabetes in patient's medical chart
- Residing in the Portland metropolitan area, and having no plans to leave the area in the next 18 months.
- Willing and able to attend the 26-weekly group meetings and 6 monthly group meetings.
- Willing to accept random assignment to the active intervention or enhanced usual care control.
- Clearance by the patient's VGMHC primary care physician to participate in the intervention.
Exclusion Criteria:
- Treatment for cancer in the past two years (excluding non-melanoma skin cancers).
- Having conditions that require limitation of physical activity or that would be contraindicated for the DASH (Dietary Approaches to Stop Hypertension) diet patterns.
- Taking weight-loss medication currently or within the past 6 months.
- Current or recent (< 12 months) pregnancy, breastfeeding, or planning pregnancy in the next 18 months.
Sites / Locations
Arms of the Study
Arm 1
Arm 2
Arm Type
Experimental
No Intervention
Arm Label
Behavioral
Enhanced usual care
Arm Description
26 weekly behavioral intervention sessions 6 monthly behavioral intervention sessions Sessions focused on diet, physical activity, behavior change
Printed materials
Outcomes
Primary Outcome Measures
Weight in Kilograms
Comparison of body weight trajectories in kilograms between the intervention and usual-care control groups.
Waist Circumference in Centimeters
Comparison of waist circumference trajectories in centimeters between the intervention and usual-care control groups.
Secondary Outcome Measures
Hemoglobin HbA1c % (Transformed Using the Inverse Cube, or 1/HbAlc%^3)
Comparison of hemoglobin HbA1c trajectories between the intervention and usual-care control groups.
Because of the severe kurtosis and skewness present in this outcome, a transformation (using the inverse cube, or 1/HbAlc%^3) was undertaken to better meet the assumptions of the analysis. Thus, the trajectory differences between arms were formally tested using the inverse cube of HbA1c, and back transforming the least square mean estimates from this model will not result in the least square means in the original metric. We performed a sensitivity analysis using the untransformed HbA1c, and that model exhibited poorer model fit. We can present the crude, observed means, or the least square means from the model using the untransformed HbA1c if it is of greater priority to have more direct interpretability of the HbA1c values than using the model that better meets the statistical assumptions.
Fasting Blood Glucose (Fbg; Transformed Using the Inverse Square, or 1/Fbg in mg/dl^2 )
Comparison of fasting blood glucose trajectories between the intervention and usual-care control groups.
Because of the severe kurtosis and skewness present in this outcome, a transformation (using the inverse square, or 1/fasting blood glucose in mg/dl^2) was undertaken to better meet the assumptions of the analysis. Thus, the trajectory differences between arms were formally tested using the inverse square of fasting blood glucose, and back transforming the least square mean estimates from this model will not result in the least square means in the original metric. We performed a sensitivity analysis using the untransformed fasting blood glucose, and that model exhibited poorer model fit. We can present the crude, observed means, or the least square means from the model using the untransformed fasting blood glucose if it is of greater priority to have more direct interpretability of the fasting blood glucose values than using the model that better meets the statistical assumptions.
Total Cholesterol
Comparison of total cholesterol trajectories between the intervention and usual-care control groups.
Number of Fruit Servings Per Day (Transformed Using the Natural Log)
Comparison of number fruit servings per day trajectories between the intervention and usual-care control groups.
Because of the severe kurtosis and skewness present in this outcome, a transformation (using the natural log) was undertaken to better meet the assumptions of the analysis. Thus, the trajectory differences between arms were formally tested using the log of the number of fruit servings per day, and back transforming the least square mean estimates from this model will not result in the least square means in the original metric. We performed a sensitivity analysis using the untransformed number of fruit servings per day, and that model exhibited poorer model fit. We can present the crude, observed means, or the least square means from the model using the untransformed number of fruit servings per day if it is of greater priority to have more direct interpretability of the # of fruit servings per day values than using the model that better meets the statistical assumptions.
Number of Kilocalories
Comparison of the number of kilocalories trajectories between the intervention and usual-care control groups.
Sugar Intake in Grams
Comparison of the sugar intake in grams trajectories between the intervention and usual-care control groups.
Dietary Fiber Intake in Grams (Transformed Using the Natural Log)
Comparison of the dietary fiber intake in grams trajectories between the intervention and usual-care control groups.
Because of the severe kurtosis and skewness present in this outcome, a transformation (using the natural log) was undertaken to better meet the assumptions of the analysis. Thus, the trajectory differences between arms were formally tested using the log of the dietary fiber intake in grams and back transforming the least square mean estimates from this model will not result in the least square means in the original metric. We performed a sensitivity analysis using the untransformed dietary fiber intake in grams, and that model exhibited poorer model fit. We can present the crude, observed means, or the least square means from the model using the untransformed dietary fiber intake in grams if it is of greater priority to have more direct interpretability of the dietary fiber intake in grams values than using the model that better meets the statistical assumptions.
Saturated Fat Intake as Percentage of Total Energy Intake
Comparison of the saturated fat intake as percentage of total energy intake trajectories between the intervention and usual-care control groups.
Number of Vegetable Servings Per Day (Transformed Using the Natural Log)
Comparison of the dietary intake of the number of vegetable servings per day trajectories between the intervention and usual-care control groups.
Because of the severe kurtosis and skewness present in this outcome, a transformation (using the natural log) was undertaken to better meet the assumptions of the analysis. Thus, the trajectory differences between arms were formally tested using the log of the number of vegetable servings per day, and back transforming the least square mean estimates from this model will not result in the least square means in the original metric. We performed a sensitivity analysis using the untransformed outcome, and that model exhibited poorer model fit. We can present the crude, observed means, or the least square means from the model using the untransformed number of vegetable servings per day if it is of greater priority to have more direct interpretability of the outcome values than using the model that better meets the statistical assumptions.
Full Information
NCT ID
NCT03113916
First Posted
April 5, 2017
Last Updated
September 2, 2020
Sponsor
Kaiser Permanente
Collaborators
Arizona State University
1. Study Identification
Unique Protocol Identification Number
NCT03113916
Brief Title
De Por Vida: A Diabetes Risk Reduction Intervention for Hispanic Women
Official Title
Culturally Competent Behavioral Intervention for Diabetes Risk Reduction
Study Type
Interventional
2. Study Status
Record Verification Date
September 2020
Overall Recruitment Status
Completed
Study Start Date
June 23, 2014 (Actual)
Primary Completion Date
March 5, 2018 (Actual)
Study Completion Date
March 5, 2018 (Actual)
3. Sponsor/Collaborators
Responsible Party, by Official Title
Sponsor
Name of the Sponsor
Kaiser Permanente
Collaborators
Arizona State University
4. Oversight
Studies a U.S. FDA-regulated Drug Product
No
Studies a U.S. FDA-regulated Device Product
No
Data Monitoring Committee
Yes
5. Study Description
Brief Summary
This pragmatic randomized clinical trial will assess the efficacy, cost, and sustainability of a culturally tailored weight-loss program targeting obese Hispanic women with pre-diabetes or T2D. The intervention will be integrated into patient care at a Federally Qualified Health Center serving over 30,000 low-income patients, and will be delivered by trained clinic staff, with minimal support from research staff. After the effectiveness clinical trial, two cohorts of clinic patients will receive the intervention in a sustainability test.
Detailed Description
Hispanic women have the highest estimated lifetime risk of developing diabetes of all ethnic/gender groups in the US, and their prevalence rates of overweight and obesity are among the highest in the US. Currently, nearly 90% of Hispanic women aged 40-59 are overweight or obese. If diagnosed with Type 2 diabetes (T2D) at age 40, Hispanic women are projected to lose 12.4 life-years, and 21.5 quality-adjusted life-years.
Several clinical trials have produced compelling evidence demonstrating the benefits of weight-loss interventions for both diabetic and pre-diabetic individuals, but most of the successful interventions tested in large clinical trials have been too costly for implementation in community settings, and they have not been assessed under real life conditions, targeting vulnerable populations.
This study builds on the investigators' success with a culturally-tailored weight-loss intervention designed for Hispanic women. Elements of cultural adaptation will include: women-only groups, skill-building tasks around food measurement, focus on traditional dietary habits and cultural norms regulating food preparation and consumption, interactive learning formats with a minimum of written materials, culturally congruent physical activity, and addressing acculturative concerns.
Follow-up data, including change in weight, waist circumference, and diabetes outcomes, will be collected at 6-, 12-, and 18-months post randomization. Additional analyses will include the cost of delivering the intervention and assessing the intervention's sustainability. The results of this study will inform the development of interventions to prevent diabetes onset or manage T2D in this population.
Description of Measures Used
Southwest Food Frequency Questionnaire (SWFFQ).
The Southwestern Food Frequency Questionnaire (SWFFQ) consists of 158 food items and was adapted from the Arizona Food Frequency Questionnaire. It provides a culturally appropriate means of collecting dietary information for the Southwestern U.S. Hispanic populations predominantly of Mexican descent. It is the only Spanish bicultural and bilingual questionnaire in widespread use in the country. Examples of food items that are included in the questionnaire are nopalitos (cactus leaves), corn and flour tortillas, refried beans, machaca, and chorizo. The SWFFQ has been tested for validity and reliability (Taren et al, 2000). The output provides 87 nutrients in addition to 25 derived variables such as percent of calories from fat. VALIDATION PAPER Taren D, Tobar M, Ritenbaugh C, Graver E, Whitacre R, Aickin M. Evaluation of the Southwest Food Frequency Questionnaire. Ecology of Food and Nutrition 38:515-547, 2000.
General Practice Physical Activity Questionnaire (GPPAQ)
The GPPAQ is a validated screening tool for use in primary care that is used to assess adult (16 - 74 years) physical activity levels. It provides a simple, 4-level Physical Activity Index (PAI) categorizing patients as: Active, Moderately Active, Moderately Inactive, and Inactive. SOURCE: https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/192453/GPPAQ_-_guidance.pdf
Client Satisfaction Questionnaire (CSQ-8).
The CSQ-8 is a well-validated, 8-item Likert-type questionnaire that has been widely used in studies of physical and mental health among Spanish-speaking and Hispanic individuals. SOURCE http://www.csqscales.com/csq-8.htm
Barriers to Healthy Eating Questionnaire (BHEQ)
The BHE is a 22-item questionnaire asking individuals to rate various feelings or situations related to following the calorie and fat-restricted diet, eg, feelings of deprivation or cost of the recommended eating plan. It has 3 subscales: Emotions (11 items), Daily Mechanics of Following a Healthy Eating Plan (8 items), and Social Support (3 items). VALIDATION PAPER Impact of Perceived Barriers to Healthy Eating on Diet and Weight in a 24-Month Behavioral Weight Loss Trial. Wang, Jing et al. Journal of Nutrition Education and Behavior , Volume 47 , Issue 5 , 432 - 436.e1
Subjective Numeracy Scale
The Subjective Numeracy Scale (SNS) is a self-report measure of perceived ability to perform various mathematical tasks and preferences for the use of numerical versus prose information. The SNS has been validated against objective numeracy measures and found to predict comprehension of risk communications and ability to complete utility elicitations.
The De Por Vida study asked questions 3 and 4 of the SNS ability subscale which asked respondents to assess their numerical ability in different contexts. The scale contains no mathematics questions and has no correct or incorrect answers. VALIDATION PAPER Fagerlin, A., Zikmund-Fisher, B.J., Ubel, P.A., Jankovic, A., Derry, H.A., & Smith, D.M. Measuring numeracy without a math test: Development of the Subjective Numeracy Scale (SNS). Medical Decision Making, 2007: 27: 672-680.
Screening Questions for Limited Health Literacy
We asked 3 screening questions to assess limited health literacy validated by Chew et al. VALIDATION PAPER Chew LD, Griffin JM, Partin MR, et al. Validation of Screening Questions for Limited Health Literacy in a Large VA Outpatient Population. Journal of General Internal Medicine. 2008;23(5):561-566. doi:10.1007/s11606-008-0520-5.
Language-Based Acculturation Scale
A simple scale for quantifying English use among Mexican Americans was constructed from four brief questions which proved to have excellent scaling characteristics by Guttman Scalogram Analysis in two independent data sets. Construct validity was established by significant associations of the scale with ethnicity, place of birth, generation within the United States, and type of neighborhood. Highly significant associations were found between scale scores and use of oral contraceptives, parity, "fatalism" regarding health, and attitudes toward folk healers. These associations remained significant (though weak) after controlling for education and family income. The language scale thus appears to be reliable and valid, to be capable of distinguishing meaningful subsets among the Mexican American population, and to be applicable to health care investigation. VALIDATION PAPER A Simple Language-based Acculturation Scale for Mexican Americans: Validation and Application to Health Care Research. Deyo, Richard A.; And Others. American Journal of Public Health, v75 n1 p51-55 Jan 1985
6. Conditions and Keywords
Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Diabetes, Weight Loss, PreDiabetes, Obesity
Keywords
Culturally-tailored, Weight Loss, Diabetes, Women, Hispanic, Obesity
7. Study Design
Primary Purpose
Prevention
Study Phase
Not Applicable
Interventional Study Model
Parallel Assignment
Model Description
Trial participants are randomly assigned to one of two conditions: 1) Enhanced usual care control, or 2) a culturally tailored behavioral intervention.
Masking
ParticipantOutcomes Assessor
Allocation
Randomized
Enrollment
195 (Actual)
8. Arms, Groups, and Interventions
Arm Title
Behavioral
Arm Type
Experimental
Arm Description
26 weekly behavioral intervention sessions 6 monthly behavioral intervention sessions Sessions focused on diet, physical activity, behavior change
Arm Title
Enhanced usual care
Arm Type
No Intervention
Arm Description
Printed materials
Intervention Type
Behavioral
Intervention Name(s)
Behavioural Lifestyle Intervention
Intervention Description
A culturally tailored behavioral intervention.
Primary Outcome Measure Information:
Title
Weight in Kilograms
Description
Comparison of body weight trajectories in kilograms between the intervention and usual-care control groups.
Time Frame
Baseline, 6, 12, and 18 months
Title
Waist Circumference in Centimeters
Description
Comparison of waist circumference trajectories in centimeters between the intervention and usual-care control groups.
Time Frame
Baseline, 6, 12, and 18 months
Secondary Outcome Measure Information:
Title
Hemoglobin HbA1c % (Transformed Using the Inverse Cube, or 1/HbAlc%^3)
Description
Comparison of hemoglobin HbA1c trajectories between the intervention and usual-care control groups.
Because of the severe kurtosis and skewness present in this outcome, a transformation (using the inverse cube, or 1/HbAlc%^3) was undertaken to better meet the assumptions of the analysis. Thus, the trajectory differences between arms were formally tested using the inverse cube of HbA1c, and back transforming the least square mean estimates from this model will not result in the least square means in the original metric. We performed a sensitivity analysis using the untransformed HbA1c, and that model exhibited poorer model fit. We can present the crude, observed means, or the least square means from the model using the untransformed HbA1c if it is of greater priority to have more direct interpretability of the HbA1c values than using the model that better meets the statistical assumptions.
Time Frame
Baseline, 6, 12 and 18 months from enrollment
Title
Fasting Blood Glucose (Fbg; Transformed Using the Inverse Square, or 1/Fbg in mg/dl^2 )
Description
Comparison of fasting blood glucose trajectories between the intervention and usual-care control groups.
Because of the severe kurtosis and skewness present in this outcome, a transformation (using the inverse square, or 1/fasting blood glucose in mg/dl^2) was undertaken to better meet the assumptions of the analysis. Thus, the trajectory differences between arms were formally tested using the inverse square of fasting blood glucose, and back transforming the least square mean estimates from this model will not result in the least square means in the original metric. We performed a sensitivity analysis using the untransformed fasting blood glucose, and that model exhibited poorer model fit. We can present the crude, observed means, or the least square means from the model using the untransformed fasting blood glucose if it is of greater priority to have more direct interpretability of the fasting blood glucose values than using the model that better meets the statistical assumptions.
Time Frame
Baseline, 6, 12, and 18 months
Title
Total Cholesterol
Description
Comparison of total cholesterol trajectories between the intervention and usual-care control groups.
Time Frame
Baseline, 6, 12, and 18 months
Title
Number of Fruit Servings Per Day (Transformed Using the Natural Log)
Description
Comparison of number fruit servings per day trajectories between the intervention and usual-care control groups.
Because of the severe kurtosis and skewness present in this outcome, a transformation (using the natural log) was undertaken to better meet the assumptions of the analysis. Thus, the trajectory differences between arms were formally tested using the log of the number of fruit servings per day, and back transforming the least square mean estimates from this model will not result in the least square means in the original metric. We performed a sensitivity analysis using the untransformed number of fruit servings per day, and that model exhibited poorer model fit. We can present the crude, observed means, or the least square means from the model using the untransformed number of fruit servings per day if it is of greater priority to have more direct interpretability of the # of fruit servings per day values than using the model that better meets the statistical assumptions.
Time Frame
Baseline, 6, 12, and 18 months
Title
Number of Kilocalories
Description
Comparison of the number of kilocalories trajectories between the intervention and usual-care control groups.
Time Frame
Baseline, 6, 12, and 18 months
Title
Sugar Intake in Grams
Description
Comparison of the sugar intake in grams trajectories between the intervention and usual-care control groups.
Time Frame
Baseline, 6, 12, and 18 months
Title
Dietary Fiber Intake in Grams (Transformed Using the Natural Log)
Description
Comparison of the dietary fiber intake in grams trajectories between the intervention and usual-care control groups.
Because of the severe kurtosis and skewness present in this outcome, a transformation (using the natural log) was undertaken to better meet the assumptions of the analysis. Thus, the trajectory differences between arms were formally tested using the log of the dietary fiber intake in grams and back transforming the least square mean estimates from this model will not result in the least square means in the original metric. We performed a sensitivity analysis using the untransformed dietary fiber intake in grams, and that model exhibited poorer model fit. We can present the crude, observed means, or the least square means from the model using the untransformed dietary fiber intake in grams if it is of greater priority to have more direct interpretability of the dietary fiber intake in grams values than using the model that better meets the statistical assumptions.
Time Frame
Baseline, 6, 12, and 18 months
Title
Saturated Fat Intake as Percentage of Total Energy Intake
Description
Comparison of the saturated fat intake as percentage of total energy intake trajectories between the intervention and usual-care control groups.
Time Frame
Baseline, 6, 12, and 18 months
Title
Number of Vegetable Servings Per Day (Transformed Using the Natural Log)
Description
Comparison of the dietary intake of the number of vegetable servings per day trajectories between the intervention and usual-care control groups.
Because of the severe kurtosis and skewness present in this outcome, a transformation (using the natural log) was undertaken to better meet the assumptions of the analysis. Thus, the trajectory differences between arms were formally tested using the log of the number of vegetable servings per day, and back transforming the least square mean estimates from this model will not result in the least square means in the original metric. We performed a sensitivity analysis using the untransformed outcome, and that model exhibited poorer model fit. We can present the crude, observed means, or the least square means from the model using the untransformed number of vegetable servings per day if it is of greater priority to have more direct interpretability of the outcome values than using the model that better meets the statistical assumptions.
Time Frame
Baseline, 6, 12, and 18 months
Other Pre-specified Outcome Measures:
Title
Average Program Cost Per Participant
Description
Average cost per participant of the De Por Vida intervention and enhanced usual care
Time Frame
12 months
Title
Recruit Participants for Sustainability Phase
Description
Number of participants recruited
Time Frame
Post-intervention for 12 months
10. Eligibility
Sex
Female
Gender Based
Yes
Minimum Age & Unit of Time
18 Years
Accepts Healthy Volunteers
Accepts Healthy Volunteers
Eligibility Criteria
Inclusion Criteria:
All participants will be patients who receive their primary medical care at the Virginia Garcia Memorial Health Center (VGMHC)
Self-identified as Spanish-speaking Latina or Hispanic
Female
Age 18 and older
BMI greater than or equal to 27kg/m2
Classified as diabetic or prediabetic in the electronic medical record by at least one of the following:
Fasting plasma glucose ≥ 100
2-h post glucose level on the 75-g oral glucose tolerance test ≥ 140-199 mg/dL (7.8-11.0 mmol/L)
Hemoglobin HBA1c ≥ 5.7
Diagnosis of diabetes in patient's medical chart
Diagnosis of prediabetes in patient's medical chart
Residing in the Portland metropolitan area, and having no plans to leave the area in the next 18 months.
Willing and able to attend the 26-weekly group meetings and 6 monthly group meetings.
Willing to accept random assignment to the active intervention or enhanced usual care control.
Clearance by the patient's VGMHC primary care physician to participate in the intervention.
Exclusion Criteria:
Treatment for cancer in the past two years (excluding non-melanoma skin cancers).
Having conditions that require limitation of physical activity or that would be contraindicated for the DASH (Dietary Approaches to Stop Hypertension) diet patterns.
Taking weight-loss medication currently or within the past 6 months.
Current or recent (< 12 months) pregnancy, breastfeeding, or planning pregnancy in the next 18 months.
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Nangel Lindberg, PhD
Organizational Affiliation
Kaiser Permanente
Official's Role
Principal Investigator
12. IPD Sharing Statement
Plan to Share IPD
No
Citations:
PubMed Identifier
33488511
Citation
Lindberg NM, Vega-Lopez S, LeBlanc ES, Leo MC, Stevens VJ, Gille S, Arias-Gastelum M, Meenan R. Lessons Learned From a Program to Reduce Diabetes Risk Among Low-Income Hispanic Women in a Community Health Clinic. Front Endocrinol (Lausanne). 2021 Jan 8;11:489882. doi: 10.3389/fendo.2020.489882. eCollection 2020.
Results Reference
derived
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De Por Vida: A Diabetes Risk Reduction Intervention for Hispanic Women
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