{"ID":2861691,"CreatedAt":"2026-06-01T04:54:23.091178241Z","UpdatedAt":"2026-06-01T04:54:23.091178241Z","DeletedAt":null,"paper_url":"https://arxiv.org/abs/2510.02511","arxiv_id":"2510.02511","title":"Vector Autoregression (VAR) of Longitudinal Sleep and Self-report Mood Data","abstract":"Self-tracking is one of many behaviors involved in the long-term self-management of chronic illnesses. As consumer-grade wearable sensors have made the collection of health-related behaviors commonplace, the quality, volume, and availability of such data has dramatically improved. This exploratory longitudinal N-of-1 study quantitatively assesses four years of sleep data captured via the Oura Ring, a consumer-grade sleep tracking device, along with self-reported mood data logged using eMood Tracker for iOS. After assessing the data for stationarity and computing the appropriate lag-length selection, a vector autoregressive (VAR) model was fit along with Granger causality tests to assess causal mechanisms within this multivariate time series. Oura's nightly sleep quality score was shown to Granger-cause the presence of depressed and anxious moods using a VAR(2) model.","short_abstract":"Self-tracking is one of many behaviors involved in the long-term self-management of chronic illnesses. As consumer-grade wearable sensors have made the collection of health-related behaviors commonplace, the quality, volume, and availability of such data has dramatically improved. This exploratory longitudinal N-of-1 s...","url_abs":"https://arxiv.org/abs/2510.02511","url_pdf":"https://arxiv.org/pdf/2510.02511v1","authors":"[\"Jeff Brozena\"]","published":"2025-10-02T19:34:23Z","proceeding":"cs.HC","tasks":"[\"cs.HC\"]","methods":"[\"LoRA\"]","has_code":false}