Participants
This secondary analysis [9] utilized undergraduate participants from a large, Midwestern university who completed an online survey on eating behaviors. Initially, 579 participants were recruited; of those, 70 participants were excluded due to completing 75% or less of the survey (n=42), completing the survey multiple times (n=17), or failing to meet quality standards (e.g., incorrect responses to attention checks; n=11). The final sample (N=509) ranged in age from 18 to 25 years (M=19.96, SD=2.93) and, on average, participants were overweight (BMI; M=25.20, SD = 5.67). Participants were women (n=390) and men (n=116; 22.7%); White (n=438; 85.7%), Black/African American (n=55; 10.8%), Latinx/Hispanic (n=19; 3.7%), Arab/Middle Eastern (n=3; 0.6%), Native American (n=5; 2.5%), or Other race/ethnicity (e.g., Asian; n=13, 2.5%); and heterosexual (n=436; 85.3%), Gay (n=11; 2.2%), Lesbian (n=9; 1.8%), Bisexual (n=37; 7.2%), or Not Listed sexual orientation (e.g., asexual; n=16; 3.1%). Furthermore, participants' socioeconomic status breakdown was middle class (n=270; 52.8%), upper middle class (n=127; 24.9%), lower middle class (n=75; 14.7%), lower class (n=26; 5.1%), and upper class (n=9; 1.8%). Finally, 6.3% (n=32) and 2% (n=10) of participants reported past and current eating disorder diagnosis, respectively. See Barnhart and colleagues [9] for additional participant information.
Measures
Height and Weight
Body mass index (BMI; kg/m2) was calculated using self-reported height in feet and inches and weight in pounds.
Demographics
Participants self-reported demographic characteristics including age, gender, socioeconomic status, year in school, race, and sexual orientation. Data were also collected on current and past eating disorder diagnosis, current and past PE, and adherence to a particular eating style (e.g., vegetarian, vegan, etc.).
Adult Picky Eating Questionnaire (APEQ)
Adult PE was examined using the APEQ [14]. The questionnaire yields four subscales that are typically averaged to create a total score: meal presentation, food variety, meal disengagement, and taste aversion. This study focused on the subscales, not the total score. Example items are “I have a strong preference toward specific food presentation (meal presentation),” “I eat a limited number of items from each food group (food variety),” “I usually feel that I have something better to do than eating (meal disengagement),” and “I reject bitter foods, even if they are only slightly bitter (taste aversion).” Participants completed 16 items, on a five-point Likert scale (1=Never, 5=Always). The APEQ has shown strong psychometric properties, including internal consistency and convergent validity [14]. Higher scores indicated greater PE.
Eating Disorder Examination Questionnaire (EDE-Q)
Disordered eating was self-reported using the EDE-Q [25]. The 28-item scale assesses attitudes, cognitions, and behaviors relating to restraint, weight, shape, and eating concerns on a seven-point Likert scale (1=No days; 7=Everyday). This study focused on the eating concerns subscale. Each of the 28 items is preceded with “on how many of the past 28 days” and followed by the statements such as “Have you gone for long periods of time (8 waking hours or more) without eating anything at all in order to influence your shape or weight?” The mean is calculated across all items in each scale, and higher scores indicate greater disordered eating.
Depression, Anxiety and Stress Scale - 21 Items (DASS-21)
Mental health concerns were assessed using the DASS-21, a short version of the 42-item instrument [27]. The DASS-21 measures depression, anxiety, and stress symptoms on a four-point Likert scale (0=Did not apply to me at all; 3=Applied to me very much, or most of the time). This study averaged scores from the three subscales for a total score, titled mental health concerns. Example items are “I experienced trembling (anxiety),” “I felt that I had nothing to look forward to (depression),” and “I found it hard to wind down (stress).” The DASS-21 has shown strong psychometric properties, including internal consistency [27] and convergent validity [28]. Higher scores indicate greater mental health concerns.
Inflexible Eating Questionnaire (IEQ)
Inflexible eating was assessed using the IEQ [29]. The 11-item scale assesses engagement in inflexible and rigid eating rules on a five-point Likert scale (1=Fully disagree; 5=Fully agree). This study used the scale’s total score with items such as, “To manage my eating through rules gives me a sense of control” and “not following my eating rules makes me feel inferior.” The IEQ has high internal consistency, construct and temporal stability [29], and higher scores indicate greater inflexible eating.
Procedure
Procedures were approved by the Institutional Review Board prior to data collection (IRB protocol #1530232). University instructors shared a recruitment script about the survey with their students. Interested students then provided informed consent and accessed the survey on Qualtrics. Participants provided demographic information followed by previously described self-report measures; median survey completion time was approximately 27 minutes. Participants received course credit or extra credit following survey conclusion and were asked to recruit their parents to complete a similar survey. However, only student responses were used in the present study.
Analytic Plan
Descriptive statistics, including mean, standard deviation, range, skew, and kurtosis were calculated. Next, internal consistency was examined across study variables, and missing data were examined. Missingness was low (APEQ (3.6%), EDE-Q (0.9%), DASS-21 (4.5%), and IEQ (0.8%)) and Little’s Missing Completely at Random (MCAR) results revealed data were MCAR (p=1.000); thus, missingness was assumed to be MCAR, and analyses utilized listwise deletion. Next, bivariate correlations were examined across study variables. Finally, homoscedasticity, normality, and linearity were examined to determine if residual variability met assumptions of multiple regression.
Two multiple regressions were calculated in SPSS 27. Across both regression analyses, predictor variables were mean centered. In step 1 across both models, BMI (mean centered) and gender (0=men, 1=women) covariates were entered given they are related to primary study variables [30-31]. In step 2, nine predictor variables were entered: picky eating facets (meal presentation, meal disengagement, taste aversion, and food variety), inflexible eating total score or mental health concerns score, and four interaction terms created between inflexible eating or mental health concerns and each picky eating facet. Across both regression models, eating concerns was the outcome variable. See Table 2 for more information.