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Predicting Symptom Trajectories of Schizophrenia using Mobile Sensing

Published: 11 September 2017 Publication History

Abstract

Continuously monitoring schizophrenia patients’ psychiatric symptoms is crucial for in-time intervention and treatment adjustment. The Brief Psychiatric Rating Scale (BPRS) is a survey administered by clinicians to evaluate symptom severity in schizophrenia. The CrossCheck symptom prediction system is capable of tracking schizophrenia symptoms based on BPRS using passive sensing from mobile phones. We present results from an ongoing randomized control trial, where passive sensing data, self-reports, and clinician administered 7-item BPRS surveys are collected from 36 outpatients with schizophrenia recently discharged from hospital over a period ranging from 2-12 months. We show that our system can predict a symptom scale score based on a 7-item BPRS within ±1.45 error on average using automatically tracked behavioral features from phones (e.g., mobility, conversation, activity, smartphone usage, the ambient acoustic environment) and user supplied self-reports. Importantly, we show our system is also capable of predicting an individual BPRS score within ±1.59 error purely based on passive sensing from phones without any self-reported information from outpatients. Finally, we discuss how well our predictive system reflects symptoms experienced by patients by reviewing a number of case studies.

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      cover image Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies
      Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies  Volume 1, Issue 3
      September 2017
      2023 pages
      EISSN:2474-9567
      DOI:10.1145/3139486
      Issue’s Table of Contents
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      Publication History

      Published: 11 September 2017
      Accepted: 01 July 2017
      Revised: 01 May 2017
      Received: 01 February 2017
      Published in IMWUT Volume 1, Issue 3

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      Author Tags

      1. BPRS
      2. Mental Health
      3. Mobile Sensing
      4. Schizophrenia

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