Table 1.

Measures of feasibility.

Measure (unit)	Definition	Calculation
Duration worn (days)	Number of days that a participant wore the vest across 6 weeks (42 days)	Number of days (out of 42) deemed as worn with minimum wear time thresholds (1-16 hours)
Wear time (hours)	The duration for which the vest was worn in a single day	Sum of the time with a heart rate of >25 beats/min and a skin temperature of >25°C
Heart rate signal quality (%)	The confidence that the heart rate data obtained are accurate	Average heart rate confidence when the vest was worn
Respiratory rate signal quality (%)	The confidence that the respiratory rate data obtained are accurate	Average respiratory rate confidence when the vest was worn
Heart rate data quality (%)	The proportion of daily wear time when the heart rate signal quality was ≥85%	Proportion of time that the heart rate confidence was ≥85% when the vest was worn
Respiratory rate data quality (%)	The proportion of daily wear time when the respiratory rate signal quality was ≥80%	Proportion of time that the respiratory rate confidence was ≥80% when the vest was worn
Skin temperature data quality (%)	The proportion of daily wear time when respiratory rate signal quality or heart rate signal quality was valid	Proportion of time that the respiratory rate confidence was ≥80% or the heart rate confidence was ≥85% when the vest was worn