Table 2.

Survey measures and descriptions administered in the Track Study

Construct	Survey description
Health-related quality of life56	The 5-item EuroQol (EQ-5D) instrument assesses mobility, self-care, usual activities, pain/discomfort, and anxiety/depression. The EuroQol visual analog scale (EQ-VAS) is similar to a health thermometer and is designed to measure self-rated health quality of life.
Physical activity57	WHO's 18-item Global Physical Activity Questionnaire measures three domains in which physical activity is performed (occupational, transport-related, and leisure-time) assessing intensity, duration, and frequency.
Dietary intake58	The 110-item Block Food Frequency Questionnaire is designed to estimate the usual and customary intake of a wide array of nutrients and food groups.
Self-reported medical conditions59	The NHANES diabetes and hypertension tools measures self-reported experience with diabetes, and hypertension awareness and treatment, and control of high blood pressure and high cholesterol.
Tobacco use28	A 3-item questionnaire from the National Health Interview Survey evaluates current smoking behaviors and previous quit attempts.
Sleep quality60,61	The Pittsburgh Sleep Quality Index assesses sleep behaviors and disturbances in the previous month.
Depression63	The 8-item Patient Health Questionnaire was designed to evaluate the presence of depressive symptoms with scores ranging from 0-24. Scores above 10 indicate moderate depression.
Negative live events62	A 16-item questionnaire measures frequency of stressful life events.
Provider communication63-65	This measures questions assess the nature of weight management counseling at previous doctor visit.
Medication adherence66	A short, modified version of the Morisky Medication Adherence Scale measures medication adherence for diabetes or hypertension management.
Perceived risk modification67	A three-item scale is used to analyze participant assessment of the risk-lowering effect of losing weight, improving diet and improving exercise on chronic disease.
Attitudes toward mental health treatment68	Four items from the Collaborative Psychiatric Epidemiology Surveys (CPES) are used to determine willingness to engage in professional treatment for mental health or substance abuse issues.
Food security69	A 6-item short form from the U.S. Household Food Security Survey determines household food security.
Perceived stress70	The Jackson Heart Study measure is used to assess perceptions of stress experienced in the past 12 months.
Health literacy71	The Newest Vital Sign health literacy tool is a 6-item questionnaire that measures participant health literacy
Self-weighing53	Participants are asked how often they weighed themselves in the past month with seven response options ranging from never to more than once a day.
Technology use72	As 15-item scale adapted from the Pew Research Center's Internet and American Life Project assessing the on use of and access to the internet and mobile technologies.
Importance of race/ethnicity to identity73	The 4-item Importance to Identity subscale of the Collective Self Esteem-Race Specific scale is used to understand the importance of one's race or ethnicity to his/her sense of identity.
Identity-based health promotion74	Survey items are adapted from the Oserman et al study used to assess identity-based motivation for a variety of health-related behaviors.
Medication use75	The Morisky Medication-Taking Adherence Scale-MMAS is a 4-item generic, self-reported scale that measures medication-taking behaviors.