Table 1 The schedule of behavioral measures in the POWERS study.

From: The Physiology Of the WEight Reduced State (POWERS) study: design and rationale for assessment of food intake, physical activity and other behavioral constructs

Variable(s) of interest

Procedure

Timepoints

BL

T0

T4

T12

Energy intake and eating-related behaviors

Food intake, macronutrient distribution, diet energy density, diet variety

Multiple-item Test Meal

 

x

x

 

Hedonic eating

Eating in the Absence of Hunger laboratory meal and snack

 

x

x

 

Healthiness and tastiness preference and food choice

Food Choice Task

x

x

x

x

Neural circuits engagement during food choice

Food Choice Task during functional MRI (at CUIMC only)

 

x

x

 

Learning and reward circuit engagement during palatable tastes and their anticipatory cues

Taste and Anticipatory Cue Gustatory Task during functional MRI (at DDPT only)

 

x

x

 

Midbrain dopamine levels

Neuromelanin-sensitive MRI

 

x

x

 

White matter tractography and connectivity

Diffusion-weight MRI

 

x

x

 

Psychological factors related to eating behavior and weight

Weight-related self-monitoring

Weight Control Strategies Scale - self-monitoring subscale items

 

x

x

x

Eating patterns

Action for HEAlth in Diabetes (Look AHEAD) Eating Patterns Questionnaire

x

x

x

x

Meal replacement use

Meal replacement frequency question

 

x

x

x

Binge and loss-of-control eating

Questionnaire on Eating and Weight Patterns-5

x

x

x

x

Dietary restraint, disinhibition and hunger

Three Factor Eating Questionnaire-51 item version

x

x

x

x

Food preferences

Geiselman Food Preference Questionnaire

x

x

x

x

Stress or emotional eating

Palatable Eating Motives Scale—Coping subscale

x

x

x

x

Food craving

Food Craving Questionnaire-Trait-Reduced

x

x

x

x

Hedonic hunger

Power of Food Scale

x

x

x

x

Weight stigma

Weight Bias Internalized Scale

x

x

  

Weight loss goals

Goals and Relative Weight Questionnaire

x

   

Confidence in weight loss maintenance

Confidence in Weight Loss Maintenance Questionnaire

 

x

  

Free-living physical activity

Objective steps, activity counts and time in sedentary behavior and activity by intensity

ActiGraph GT3X+ (wrist-worn actigraphy)

x

x

x

x

Self-report time in moderate and vigorous activity by domain

Global Physical Activity Questionnaire

x

x

x

x

Sleep

Objective sleep duration, efficiency, latency, timing, wake after sleep onset, frequency of awakenings, and ambient light

ActiGraph GT3X+ (wrist-worn actigraphy)

x

x

x

x

Objective sleep quality and disturbances (e.g., apneas and hypopneas)

zMachine Synergy System (polysomnography)

x

x

x

x

Self-report sleep quality

Pittsburgh Sleep Quality Index

x

x

x

x

Self-report chronotype

Morningness-Eveningness Questionnaire

x

x

x

x

  1. BL baseline, CUIMC Columbia University Irving Medical Center, DTP Drexel/Dartmouth/Tufts/Penn, MRI magnetic resonance imaging, T0 time zero, T4 time 4 months, T12 time 12 months.
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