Background: Although research suggests a relationship between restrictive eating disorders (EDs) and autism, there is a lack of research in this area from the perspective of autistic men. Our aim was to explore whether ED symptoms are heightened in autistic men compared with nonautistic men.
Methods: We recruited 103 autistic and nonautistic participants through an online study. We assessed ED symptoms, autistic features, anxiety, depression, and body mass index (BMI) using self-report measures.
Results: Autistic men (n = 54) exhibited significantly higher levels of ED symptoms in the areas of eating (p < 0.001), shape (p = 0.005), and weight (p = 0.001) concerns, and the global score (p = 0.046) than nonautistic men (n = 49). However, autistic men scored significantly lower in the area of dietary restraint (p = 0.032). Global ED scores did not correlate with autistic traits, but did correlate with anxiety (p < 0.001) and BMI (p < 0.001) in the autistic group.
Conclusions: This exploratory study suggests that heightened ED symptoms in autistic men may be related to heightened levels of anxiety and higher BMIs, rather than autistic traits. It also highlights that autistic men may experience symptoms not relating to dietary restraint. Future research should consider further exploring the relationship between anxiety, BMI, and disordered eating in autism.
Lay summary: Why was this study done?: There is a lot of interest in the relationship between autism and eating disorders (EDs). Research suggests that as many as one in four people with anorexia could be autistic. However, most research has been done (1) on women and (2) looking at autistic traits in women with anorexia. There is less research looking at the relationship from the perspective (1) of men and (2) looking at ED symptoms in autistic people.What was the purpose of this study?: We aimed to explore whether autistic men experience more ED symptoms than nonautistic men.What did the researchers do?: This was an online study. We asked participants to fill out self-report measures of autistic traits and ED symptoms. We also asked participants to self-report whether they were autistic, and whether they had been previously diagnosed with an ED. We included 54 autistic men and 49 nonautistic men.What were the results of the study?: We found that although autistic men did experience higher levels of ED symptoms than nonautistic men, this did not appear to be related to autistic traits. Instead ED symptoms were related to anxiety and higher rates of being overweight or obese. In addition, autistic men in fact experienced significantly lower levels of ED symptoms associated with dietary restraint than nonautistic men.What do these findings add to what was already known?: Our findings reflect some previous research findings that ED symptoms may be heightened in autistic people. They also suggest that these symptoms are related to higher levels of anxiety or body mass indexes (BMIs) in autistic people, rather than autistic traits themselves. Also, most previous research has focused on symptoms of restraint in EDs and autism, for example, limiting the amount you eat or not eating certain foods. In our study, restraint was not found to be heightened, suggesting that focusing on restraint symptoms might be less relevant to autistic men.What are potential weaknesses in the study?: One key weakness is our use of self-report measures, particularly asking participants to self-report their autism diagnosis. An additional limitation is the small sample size, which makes it hard to generalize findings.How will these findings help autistic adults now or in the future?: More research is needed to understand the relationship between anxiety, BMI, autism, and ED symptoms. Our findings could help our understanding of disordered eating in autistic adults as they suggest we need to pay more attention to autistic adults experiencing ED symptoms that are not related to dietary restriction, such as binge eating.
Keywords: adults; autism; co-occurring conditions; eating disorders; men.
Copyright 2019, Mary Ann Liebert, Inc., publishers.