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  • Title: Repetitive Negative Thinking As a Transdiagnostic Prospective Predictor of Depression and Anxiety Symptoms in Neurodiverse First-Semester College Students.
    Author: McKenney EE, Brunwasser SM, Richards JK, Day TC, Kofner B, McDonald RG, Williams ZJ, Gillespie-Lynch K, Kang E, Lerner MD, Gotham KO.
    Journal: Autism Adulthood; 2023 Dec 01; 5(4):374-388. PubMed ID: 38116057.
    Abstract:
    BACKGROUND: Improving the understanding and treatment of mental health concerns, including depression and anxiety, are significant priorities for autistic adults. While several theories have been proposed to explain the high prevalence of internalizing symptoms in autistic populations, little longitudinal research has been done to investigate potential causal mechanisms. Additional research is needed to explore how proposed contributors to depression from general population research predict and/or moderate the development of internalizing symptoms in autistic individuals. In this study, we investigated the relation of one established risk factor, repetitive negative thinking (RNT), to internalizing symptoms over the course of college students' first semester, additionally examining whether this association is moderated by a measure of autistic traits. METHODS: Students were recruited from 4 northeastern U.S. universities: 144 participating students included 97 nonautistic students and 47 participants who either reported a formal autism diagnosis (n = 15) or endorsed a history of self and/or others thinking that they may be autistic (n = 32). Participants completed a baseline survey battery within their first 2 weeks of starting college, a brief biweekly survey throughout their first semester (up to 24 times across 12 weeks), and an endpoint packet. RESULTS: Elevated trait-like RNT at baseline was prospectively associated with biweekly ratings of depression and anxiety symptoms across the semester. In addition, greater RNT was synchronously related to elevated sadness, anhedonia, and anxiety throughout the semester. Contrary to hypotheses, a shorter term predictive relationship between RNT at one timepoint and mood symptoms at the next was largely unsupported. While these patterns were observed across neurotypes, students with higher self-reported autistic traits were more likely to experience RNT, as well as depressive and anxiety symptoms. CONCLUSIONS: These preliminary findings highlight RNT as a specific mechanism that may be a useful prevention and/or intervention target toward reducing the elevated depression and anxiety rates in the autistic community. WHY WAS THIS STUDY DONE?: Many autistic people have depression and anxiety. However, we know very little about why autistic people are more likely to have these mental health concerns than people who are not autistic. We also do not know what leads to these symptoms over time. One theory is that repetitive negative thinking (RNT; or thinking repeatedly about problems and worries) might cause depression and anxiety. Autistic people might do more RNT than nonautistic people. WHAT WAS THE PURPOSE OF THIS STUDY?: In this study, we wanted to see how RNT might relate to depression and anxiety over the first semester of college. We looked at how this might be related to autistic traits. WHAT DID THE RESEARCHERS DO?: The researchers gave surveys to 144 students about their experiences with depression, anxiety, and RNT. The participants answered these surveys at the beginning and end of their first semester at their university. They also completed a brief survey 24 times (twice per week for 12 weeks) during the semester. WHAT WERE THE RESULTS OF THE STUDY?: We found that overall RNT levels at the beginning of the semester were related to sadness, anhedonia (lack of pleasure), and anxiety later. In-the-moment RNT reported on the twice-weekly survey was also related to sadness, anhedonia, and anxiety. However, RNT on biweekly surveys did not seem to predict mood symptoms a few days later. Students with higher levels of autistic traits tended to report more depression and anxiety, as well as more RNT. WHAT DO THESE FINDINGS ADD TO WHAT WAS ALREADY KNOWN?: This study helps us to understand that RNT might be related to depression and anxiety, regardless of whether or not someone is autistic. This might mean that reducing RNT could help prevent or treat depression and anxiety, especially in autistic adults. WHAT ARE POTENTIAL WEAKNESSES IN THE STUDY?: Our study had a low number of participants with formal autism diagnoses (15 people), so it might not represent the broader population of autistic adults with formal diagnoses as well as we would like. Nevertheless, we had a larger group with self-reported or suspected autism (32 people). HOW WILL THESE FINDINGS HELP AUTISTIC ADULTS NOW OR IN THE FUTURE?: These findings help us to better understand risk factors for depression and anxiety in autistic adults. Since RNT was related to depression and anxiety in the same way regardless of levels of autistic traits in our study, we hope that clinicians will feel more comfortable providing therapy to people with mood disorders, regardless of whether they are autistic and/or have high autistic traits. This could be a small step toward increasing equity and accessibility of mental health services for autistic adults.
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