PHIT for Duty, a Personal Health Intervention Tool for Psychological Health and Traumatic Brain Injury.

摘要

The purpose of this project is to help prevent psychological disorders in high-risk individuals with early symptoms of stress, depression, substance use, and other health problems. PHIT for Duty integrates self-report and physiological sensor instruments to assess health status via brief weekly screening questionnaires in five domains (i.e., stress, anxiety, sleep quality, depression, and alcohol use). An expert system, called the intelligent virtual advisor (iVA), processes these data using evidence-based logic to determine health risk and to prescribe SHIs including mindfulness meditation, health education, and cognitive behavior change modules for reducing stress, attentional restructuring, improving sleep and reducing alcohol use. Usability studies were conducted with 31 participants using the PHIT devices, assessments, and interventions over 10 to 28-day data collections. Some participants also tested the ear pulse sensor (N=23), Zeo sleep monitor (N=27), and wrist actigraphy (N=27). Participants were debriefed on usability, technical performance, and suggestions for improvements. Usability was rated on a 1 to 5 (very hard to very easy) Likert scale, and a subset also reported on the System Usability Scale (N=9). Usability results are as follows (mean + or - sd): overall system (4.5 + or - 0.6), self-report instruments (4.5 + or - 0.7), ear pulse sensor (3.7 + or - 1.2), Zeo sleep monitor (4.4 + or - 0.7), Zeo sleep monitor comfort (3.7 + or - 1.1), and wrist actigraphy comfort (2.7 + or - 0.9). The average SUS was 85 + or - 12, indicating a high percentile rank of 95%. Usability evaluation of the PHIT for Duty health assessments, physiological sensors, system acceptability, and overall functionality have shown positive results and affirmation of the PHIT for Duty mobile application design.