Daily Self-weighing and Holiday-associated Weight Gain in Adults

Study Overview
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Brief Summary
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Background: Previous studies report 0.4-1.5kg of weight gain during the holiday season, which may contribute to annual weight gain. Purpose: To test whether daily self-weighing (DSW) can prevent holiday weight gain. Hypothesis: We hypothesized that daily self-weighing would effectively prevent weight and fat gain, and that individuals with overweight and obesity would respond most favorably to DSW.

Detailed Description
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A single-blinded randomized control trial: Adults (age 18-75y, BMI ≥ 18.5kg/m2) were randomized to either a control or daily self-weighing (DSW) group. There were 3 testing visits: pre-holiday (v1: within 7d before Thanksgiving), post-holiday (v2: within 7d after New Year's Day), and a follow-up (v3: 14 weeks after v2). The DSW group were given Wi-Fi scales that provide graphical feedback of daily weight. They were instructed to perform DSW during the holidays and to try not to gain weight above baseline weights. Anthropometrics were measured at each visit.

Official Title
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Daily Self-weighing and Holiday-associated Weight Gain in Adults

Conditions
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Obesity

Intervention / Treatment
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* Device: Daily self-weighing (DSW)


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: BMI of at least 18.5 kg/m2 Recognizing or celebrating at least two holidays between November and January Access to WiFi Exclusion Criteria: Current eating disorder, history of an eating disorder Involvement in a current weight loss and/or exercise program Pregnancy or nursing Any medications or chronic diseases affecting metabolism or body weight

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 75 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| No Intervention: Control<br>Participants in this group received no intervention during t he holiday season | |
| Experimental: Daily Self-Weighing (DSW)<br>Participants in this group performed daily self-weighing using digital WiFi scales during the holiday season | Device: Daily self-weighing (DSW)<br>* DSW was conducted using digital WiFi scales during the holiday season. Participants received electronic graphic feedback of their weight fluctuations immediately after weight measurement.<br>* Other names: DSW;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in Body Weight (kg) From Pre- to Post-holiday and 14-week Follow-up Post-holiday | Mechanical Beam Scale (Model 402KL, Health o Meter professional scales, McCook, IL, USA); Capacity: 390 lbs / 180 kg; Readability: 1/4 lb / 100 g. | Measured at 3 testing visits: Visit 1 (pre-holiday visit) occurred within 7 days before Thanksgiving, visit 2 (post-holiday visit) occurred within 7 days after New Year's Day, and visit 3 (follow-up visit) occurred 14 weeks after visit 2. | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Body Mass Index (BMI) (kg/m^2) | weight and height will be combined to report BMI in kg/m^2 | Measured at 3 testing visits: Visit 1 (pre-holiday visit) occurred within 7 days before Thanksgiving, visit 2 (post-holiday visit) occurred within 7 days after New Year's Day, and visit 3 (follow-up visit) occurred 14 weeks after visit 2. | 
| Body Fat (%) | Dual Energy X-Ray Absorptiometry | Measured at 3 testing visits: Visit 1 (pre-holiday visit) occurred within 7 days before Thanksgiving, visit 2 (post-holiday visit) occurred within 7 days after New Year's Day, and visit 3 (follow-up visit) occurred 14 weeks after visit 2. | 
| Waist Circumference (cm) | Measuring tape | Measured at 3 testing visits: Visit 1 (pre-holiday visit) occurred within 7 days before Thanksgiving, visit 2 (post-holiday visit) occurred within 7 days after New Year's Day, and visit 3 (follow-up visit) occurred 14 weeks after visit 2. | 
| Hip Circumference (cm) | Measuring tape | Measured at 3 testing visits: Visit 1 (pre-holiday visit) occurred within 7 days before Thanksgiving, visit 2 (post-holiday visit) occurred within 7 days after New Year's Day, and visit 3 (follow-up visit) occurred 14 weeks after visit 2. | 
| Concentration of Blood Triglyceride (mg/dL) | Fasting blood draw | Measured at 3 testing visits: Visit 1 (pre-holiday visit) occurred within 7 days before Thanksgiving, visit 2 (post-holiday visit) occurred within 7 days after New Year's Day, and visit 3 (follow-up visit) occurred 14 weeks after visit 2. | 
| Concentration of Blood High-density Lipoprotein (HDL) (mg/dL) | Fasting blood draw | Measured at 3 testing visits: Visit 1 (pre-holiday visit) occurred within 7 days before Thanksgiving, visit 2 (post-holiday visit) occurred within 7 days after New Year's Day, and visit 3 (follow-up visit) occurred 14 weeks after visit 2. | 
| Concentration of Blood Low-density Lipoprotein (LDL) (mg/dL) | Fasting blood draw | Measured at 3 testing visits: Visit 1 (pre-holiday visit) occurred within 7 days before Thanksgiving, visit 2 (post-holiday visit) occurred within 7 days after New Year's Day, and visit 3 (follow-up visit) occurred 14 weeks after visit 2. | 
| Concentration of Blood Total Cholesterol (TC) (mg/dL) | Fasting blood draw | Measured at 3 testing visits: Visit 1 (pre-holiday visit) occurred within 7 days before Thanksgiving, visit 2 (post-holiday visit) occurred within 7 days after New Year's Day, and visit 3 (follow-up visit) occurred 14 weeks after visit 2. | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Holiday weight gain, Daily self-weighing, Weight maintenance, Caloric titration method, Obesity, Overweight, Holiday season