Fig. 2
Title: Overall Willingness to Participate in Weight-Related Research by Weight Status. Caption: Distribution of Willingness to Participate in Weight-Related Research as measured by kernel density according to body mass index category (underweight: BMI < 18 kg/m2; normal weight: BMI 25–30 kg/m2; obesity: BMI 30–35 kg/m2; morbid obesity: BMI > 35 kg/m2). The inset figure shows adjusted odds ratios from multivariable ordinal regression comparing a person’s overall willingness to participate in weight-related research and weight status, controlling for age, sex, study site, number of people in the home, marital status, highest education, race/ethnicity, and their general willingness to participate in research. Odds ratios represent the increased odds for a one-point increase in willingness to participate in weight related research, which approximates a ½-standard deviation change in the scale. Error bars represent the 95% CI. All odds ratios were significant at p < 0.001. The referent group is underweight