Online Family Dyadic Skills Training for Black Adults in Behavioral Weight Loss Program

Body weight (kg) expressed as a continuous variable will be collected on a digital scale.

Body mass index calculated from kg/m^2.

The Eating Behavior Inventory (EBI) 20 items measures the adoption of eating behaviors associated with weight loss (e.g., monitoring quantity eaten, frequency of weighing, shopping from a list) to measure self-regulation behaviors. Items are rated on a 5-point frequency scale from "never or hardly ever" to "always or almost always." Scores range from 26 to 130. Items are scored such that higher scores indicate eating patterns that are considered more "appropriate" or facilitative of weight control.

Measured by survey responses to the Weight Efficacy Lifestyle Questionnaire Short Form (WEL-SF).Scale goes from 0 (not at all confident) to 10 (very confident). Higher scores mean better self efficacy. The total score on the WEL-SF ranges from 0 to 80, with higher scores indicating greater self-efficacy in controlling eating behaviors. There are 8 items. This information presented here represents change scores from baseline to post intervention.

Social Support Effectiveness Survey (25 items) measures partner social support effectiveness. The measure includes items assessing the quantity and quality (e.g., "To what extent did you wish this person's advice or information had been different somehow-for instance, a different type of help, or offered in a different way or at a different time?") on a rating scale ranging from "not at all" to "extremely" for 3 types of support (e.g., emotional, informational, and instrumental). The measure also assesses negative byproducts of support provided (e.g., feelings of guilt or indebtedness) using Yes/No options. All responses are numerically transformed. Total scores range from 0 to 80, with higher scores indicating more effective support.

The Social Support and Eating Habits Survey (10 items) measures social support specific to healthy eating. Assess encouragement for eating behaviors from partners (e.g., "Encouraged me not to eat 'unhealthy food' when I am tempted") and discouragement for eating behaviors from partners (e.g., "Brought home foods I am trying not to eat"). The items are rated on a scale of "none" to "very often." Total scores range from 5 to 50, with higher scores indicating more social support for eating behaviors.

The exercise participation subscale of the Social Support and Exercise Survey (10 items) measures social support specific to exercise behaviors assessing the level of support for exercise from partners. Subscale example items include "Exercised with me" and "Criticized or made fun of me for exercising." Total scores range from 5 to 50, with higher scores indicating more social support for exercise participation behaviors.

Family communication is assessed with the communication subscale of the McMaster Family Assessment Device (6 items). Communication is defined as the exchange of information among family members. Items focused on whether verbal messages were clear and direct for the intended recipient. Responses ranged from "strongly agree" to "strongly disagree." . Uses a 4-point Likert scale for responses, ranging from "strongly disagree" to "strongly agree", subscale 1-4. Total score range 6-24. Higher scores represent unhealthy communication. Change score from baseline to post intervention presented here.

The cohesion subscale (10 items) of the Family Adaptability and Cohesion Evaluation Scale III measures the emotional bonding family members have with one another. Items like "Family members ask each other for help" rated on a 5-point Likert scale from "almost never" to "almost always." The score has a range of 10 to 50.

The family emotional involvement (7 items) of the Family Emotional Involvement and Criticism Scale rate items on a 5-point Likert scale. The scale has a range of 7 to 35. Higher scores on the emotional involvement subscale indicate higher levels of perceived emotional involvement.

The perceived criticism (7 items) subscales of the Family Emotional Involvement and Criticism Scale rate items like on a 5-point Likert scale. The scale has a range of 7 to 35. Higher scores on the perceived criticism scale indicate higher levels of perceived emotional involvement.

The Family Problem-Solving Communication Index (10 items) was used to measure the specific communication style that families use to manage and solve problems and conflicts in various types of stressful situations. The 2 subscales are combined to report a total score for affirmatory communication and incendiary communication combined, the response options were "false," "mostly false," "mostly true," and "true." Scores range from 10 to 50 and a higher/lower score reflects a worse problem solving skills.