Identifying social isolation themes in NVDRS text narratives using topic modeling and text-classification methods

• URL: http://arxiv.org/abs/2506.15030v1
• Date: Wed, 18 Jun 2025 00:13:42 GMT
• Title: Identifying social isolation themes in NVDRS text narratives using topic modeling and text-classification methods
• Authors: Drew Walker, Swati Rajwal, Sudeshna Das, Snigdha Peddireddy, Abeed Sarker,
• Abstract summary: Social isolation and loneliness are not currently recorded within the US National Violent Death Reporting System.<n>Natural language processing (NLP) techniques can be used to identify these constructs in law enforcement and coroner medical examiner narratives.
• Score: 2.2822409889718798
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Social isolation and loneliness, which have been increasing in recent years strongly contribute toward suicide rates. Although social isolation and loneliness are not currently recorded within the US National Violent Death Reporting System's (NVDRS) structured variables, natural language processing (NLP) techniques can be used to identify these constructs in law enforcement and coroner medical examiner narratives. Using topic modeling to generate lexicon development and supervised learning classifiers, we developed high-quality classifiers (average F1: .86, accuracy: .82). Evaluating over 300,000 suicides from 2002 to 2020, we identified 1,198 mentioning chronic social isolation. Decedents had higher odds of chronic social isolation classification if they were men (OR = 1.44; CI: 1.24, 1.69, p<.0001), gay (OR = 3.68; 1.97, 6.33, p<.0001), or were divorced (OR = 3.34; 2.68, 4.19, p<.0001). We found significant predictors for other social isolation topics of recent or impending divorce, child custody loss, eviction or recent move, and break-up. Our methods can improve surveillance and prevention of social isolation and loneliness in the United States.

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