![]() We found that the r/HealthAnxiety forum showed spikes in posts about COVID-19 early on in January, approximately 2 months before other support groups started posting about the pandemic. We applied unsupervised methods such as topic modeling and unsupervised clustering to uncover concerns throughout Reddit before and during the pandemic. Using supervised machine learning, we classified posts into their respective support groups and interpreted important features to understand how different problems manifest in language. Using regression, we analyzed trends from 90 text-derived features such as sentiment analysis, personal pronouns, and semantic categories. We created and released the Reddit Mental Health Dataset including posts from 826,961 unique users from 2018 to 2020. The aim of this study is to leverage natural language processing (NLP) with the goal of characterizing changes in 15 of the world's largest mental health support groups (eg, r/schizophrenia, r/SuicideWatch, r/Depression) found on the website Reddit, along with 11 non-mental health groups (eg, r/PersonalFinance, r/conspiracy) during the initial stage of the pandemic. The COVID-19 pandemic is impacting mental health, but it is not clear how people with different types of mental health problems were differentially impacted as the initial wave of cases hit. 11 Department of Otolaryngology, Harvard Medical School, Boston, MA, United States.10 Thomas J Watson Research Center, IBM, Yorktown Heights, NY, United States.9 Digital Psychiatry Division, Department of Psychiatry at Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States.8 Human Health and Performance Systems, Massachusetts Institute of Technology Lincoln Laboratory, Lexington, MA, United States.7 Department of Biomedical Informatics, Harvard Medical School, Boston, MA, United States.6 Broad Institute of Massachusetts Institute of Technology and Harvard, Cambridge, MA, United States.5 Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States. ![]() 4 Center for Data Sciences, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States.3 McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, MA, United States.2 Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States.1 Program in Speech and Hearing Bioscience and Technology, Harvard Medical School, Boston, MA, United States. ![]()
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