Evaluating Food Messaging Campaigns for Young Adults

Overall diet quality calculated from up to two unannounced, nonconsecutive 24-hour dietary recalls (1 weekend day, 1 weekday) collected via NCI's Automated Self-Administered 24-Hour Dietary Assessment Tool (ASA24) at each time point. Healthy Eating Index-2020 scores reflect alignment with the US Dietary Guidelines for Americans; higher scores indicate healthier diet quality (i.e., greater intake of fruits, vegetables, whole grains, dairy, protein, and unsaturated fats and lower intake of saturated fat, sodium, added sugars, and refined grains).

Consumption of the food groups targeted in the campaigns (sugary drinks, processed sweet and salty snack foods) will be assessed using two unannounced, nonconsecutive 24-hour dietary recalls (1 weekend day, 1 weekday) collected via NCI's Automated Self-Administered 24-Hour Dietary Assessment Tool (ASA24) at each time point. Servings of each target food group will be calculated and summed such that higher values indicate higher consumption of the target food groups.

Survey items will assess internalized weight stigma using the 11-item Modified Weight Bias Internalization Scale (e.g., "I am less attractive than most other people because of my weight."). Responses will be measured on 5-point Likert scale ranging from "Strongly disagree" (1) to "Strongly agree" (5). Responses will be coded such that higher scores indicate higher internalized weight stigma. Responses to the 11 items will be averaged.

Survey items will assess disordered eating attitudes and behaviors using the Eating Disorder Examination Questionnaire (EDE-Q), a 28-item self-report questionnaire assessing the range, frequency, and severity of disordered eating attitudes and behaviors, including restraint, eating concern, shape concern, and weight concern. Responses will be measured on a 6-point scale, ranging from "No days" or "None of the times" or "Not at all" or "Not at all markedly" (each coded as 0) to "Every day" or "Every time" or "Markedly" or "Moderately" (each coded as 5). Following scoring guidance, global scores will be calculated as follows: analyses will sum responses within each of the 4 subscales (restraint, eating concern, shape concern, and weight concern), divide those scores by the number of items in the subscale, sum the subscale scores, and divide this sum by 4. Higher global scores indicate higher frequency or severity of disordered eating attitudes and behaviors.

Survey items will assess the extent to which participants feel positively or negatively toward food companies that sell unhealthy foods with 2 items: "How do you feel about companies that sell sugary drinks?" and "How do you feel about companies that sell processed sweet and salty snack foods?" Each item will be measured on a 5-point Likert scale ranging from "Very unfavorably" (1) to "Very favorably" (5). Responses to these items will be averaged. Higher scores indicate more positive attitudes toward unhealthy food companies.

Survey items will assess the extent to which participants view healthy eating behaviors (such as reducing their sugary drink consumption) as aligned with personal values such as autonomy and respect with two items: "When I limit how much I drink sugary drinks, I'm doing my part to disempower companies that try to cover up scientific evidence" and "When I limit how much I eat sweet and salty snacks, I'm doing my part to disempower companies that try to cover up scientific evidence." Responses will be measured on a 5-point Likert scale ranging from "Strongly disagree"(1) to "Strongly agree" (5). Responses to these items will be averaged. Higher scores indicate higher perceived alignment of healthy eating with values.

Survey items will assess the extent to which participants hold negative views about people with higher body weight using the 20-item Universal Measure of Bias - Fat Scale (UMB-FAT). Response items will be measured on a 5-point Likert scale ranging from "Strongly agree" (1) to "Strongly disagree" (5). Responses to these items will be averaged. Higher scores indicate higher externalized weight stigma.

Survey items will assess the extent to which participants attribute responsibility for body weight to individuals using the 16-item Causal Attribution for Obesity scale. Response items will be measured on a 5-point Likert scale ranging from "Strongly agree" (1) to "Strongly disagree" (5). Responses to these items will be averaged. Higher scores indicate stronger attribution of responsibility to individuals for their body weight.