Overweight and Obesity
Conditions
Keywords
Overweight, Obesity, Rural Health, Weight Loss, Weight Maintenance, Rural Middle Aged and Older Women, Web Intervention Weight Loss, Class I, II, & III obese (BMI 28 to 45)
Brief summary
This project will evaluate an Internet delivery strategy to address weight loss and maintenance among rural midlife and older women.
Detailed description
According to the National Institutes of Health, obesity is one of the most daunting health challenges of the 21st century. Approximately 2/3 of all adults are overweight or obese. Efforts to abate the growing prevalence of obesity have not been successful. The Strategic Plan for NIH Obesity Research proposes preventing and treating obesity through lifestyle modification. The purpose of this study is to evaluate the effectiveness of a theory-based intervention framed within the Health Promotion Model (HPM) in facilitating weight loss and maintenance through promotion of healthy eating and physical activity among an underserved, vulnerable population of overweight or obese rural women aged 40-69. During these years, women experience increases in peri- and post-menopausal health risks that are magnified if they are overweight or obese. Weight loss will reduce risks and enhance functional status as they age. Maintenance of weight loss will be emphasized. The Internet offers a way to reach isolated rural women who have limited options for weight loss guidance. PUBLIC HEALTH RELEVANCE: Obesity is recognized as a major and growing public health problem. While many weight loss programs have been successful in the short term, they have not been successful in helping to maintain weight loss.
Interventions
BEHAVIORALExperimental: Web-based only (WO) weight intervention
The WO intervention included evidence-based lifestyle modification for healthy eating and activity, with self-monitoring and goal setting, and messages based on constructs from the Health Promotion Model across 3 phases. The intent of the phases was to deliver more intensive intervention during Phase 1, transitioning to less intensive intervention during phase 2, to providing support for self managed weight maintenance during Phase 3.
BEHAVIORALExperimental: WO plus peer-led discussion board (WD)
Includes WO intervention plus asynchronous discussion board managed by peer leader, whose identity is masked. The peer leader who posted theme-based messages, called primers, that were consistent with WO themes across phases.
BEHAVIORALExperimental: WO & professional email counseling (WE)
Includes WO intervention plus professional email counseling provided by a registered dietitian whose identity is masked. The email counselor is responsible for reviewing eating, activity, weight logs, and goals on the web-site and send e-mail feedback, in addition to responding to email questions. The e-mail process will follow the 5A's Model for Behavioral Counseling (assess, advise, agree, assist, and arrange) that was adapted for this study.
Sponsors
National Institute of Nursing Research (NINR)
University of Nebraska
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Caregiver)
Eligibility
Sex/Gender
FEMALE
Age
40 Years to 69 Years
Healthy volunteers
No
Inclusion criteria
* women aged 40-69 * overweight or Class I & II obese (BMI 28 to 39.9)or BMI 40 to 45 with physician clearance * state a commitment to losing weight * speak and read English * able to communicate over the telephone * able to use a computer with minimal assistance and complete electronic forms and surveys * have access to and are able to access the Internet * commitment to access the website as required by the research intervention including weekly self-reporting of calories and fat grams, weekly self-reporting of physical activity, pedometer steps, and body weight, and weekly (or more often) participation in other website components as determined by group to which randomized and phase of intervention * have or are willing to obtain an email account * have access to a DVD player * able to walk without an assistive device * answer 'no' to all questions on the Physical Activity Readiness Questionnaire (PAR-Q) or obtain clearance from their physician to become more active
Exclusion criteria
* diagnosed with Type 1 diabetes * diagnosed with Type 2 diabetes and require insulin * ≥ 10% weight loss in last six months * enrolled in a weight loss management program * enrolled in a formal program of cardiac rehabilitation or undergoing physical rehabilitation * taking medications that affect weight loss or weight gain * other physical or medical restrictions that would preclude following the minimum recommendations for moderate physical activity and healthy eating.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Differences in Change in Healthy Eating and Activity Outcomes between Groups - Blood Lipids | Phase 1-baseline and 6 months, Phase 2-6 months and 18 months, Phase 3-18 months and 30 months | Aim 2: Differences in Change in Healthy Eating and Activity Outcomes between Groups - Blood Lipids |
| Differences in Change in Healthy Eating and Activity Outcomes between Groups - Kcal intake | Phase 1-baseline and 6 months, Phase 2-6 months and 18 months, Phase 3-18 months and 30 months | Aim 2: The secondary aim of the study was to compare the effectiveness of web-based only (WO) intervention with web-based interventions supplemented with peer-led discussion support group (WD) or professional email counseling (WE) for achieving change in primary outcomes of behavioral and biomarkers of healthy eating and activity between groups across three phases \[Phase I guided weight loss (baseline and 6 months), Phase 2 continued guided weight loss and weight maintenance over 12 months (6 months and 18 months), Phase 3 self-directed weight maintenance over 12 months (18 months and 30 months)\] |
| Differences in Change in Healthy Eating and Activity Outcomes between Groups - Weekly minutes moderate or greater intensity activity | Phase 1-baseline and 6 months, Phase 2-6 months and 18 months, Phase 3-18 months and 30 months | Aim 2: Differences in Change in Healthy Eating and Activity Outcomes between Groups - Weekly minutes moderate or greater intensity activity |
| Differences in Change in Healthy Eating and Activity Outcomes between Groups - Blood Pressure | Phase 1-baseline and 6 months, Phase 2-6 months and 18 months, Phase 3-18 months and 30 months | Aim 2: Differences in Change in Healthy Eating and Activity Outcomes between Groups - Blood Pressure |
| 1: Differences in Change in Weight between Groups - Body Weight (kg) | Phase 1-baseline and 6 months, Phase 2-6 months and 18 months, Phase 3-18 months and 30 months | Aim 1: The primary aim of the study was to compare the effectiveness of web-based only (WO) intervention with web-based interventions supplemented with peer-led discussion support group (WD) or professional email counseling (WE) for achieving change in the primary outcome of body weight between groups across three phases \[Phase I guided weight loss (baseline to 6 months), Phase 2 continued guided weight loss and weight maintenance over 12 months (6 months and 18 months), Phase 3 self-directed weight maintenance over 12 months (18 months and 30 months)\]. |
| Differences in Change in Weight between Groups - waist circumference (cm) | Phase 1-baseline and 6 months, Phase 2-6 months and 18 months, Phase 3-18 months and 30 months | Aim 1: Differences in Change in Weight between Groups - waist circumference (cm) |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Differences in Change in attaining Criterion-based Healthy Eating between Groups | Phase 1-baseline and 6 months, Phase 2-6 months and 18 months, Phase 3-18 months and 30 months | Aim 2: Differences in Change in attaining Criterion-based Healthy Eating between Groups |
| Differences in Change in attaining Criterion-based Physical Activity between Groups | Phase 1-baseline and 6 months, Phase 2-6 months and 18 months, Phase 3-18 months and 30 months | Aim 2: Differences in Change in attaining Criterion-based Physical Activity between Groups |
| Differences in Change in attaining Criterion-based Weight loss targets between Groups | Phase 1-baseline and 6 months, Phase 2-6 months and 18 months, Phase 3-18 months and 30 months | Aim 1: Differences in Change in attaining Criterion-based Weight loss targets between Groups |
Countries
United States
Outcome results
None listed