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Table 1 Features for usage sensor

From: Designing effective visualizations of habits data to aid clinical decision making

Feature Description
Time in bed The (first) time in bed (after 18:00)
Time out of bed The (last) time out of bed (before 12:00)
Mean time The mean time of being in bed (over accumulated period in bed)
Total period in bed Total period between time in bed and time out of bed
Accumulated period in bed (or Occupancy) Accumulation of all periods bed was occupied
Accumulated period out of bed Accumulated periods bed was unoccupied between
time in bed and time out of bed
Continuity Accumulated period in bed divided by Total period in bed