Table 1. BWBP parameters with units and description.

BWBP parameter	unit	description
RR	breaths/min	respiratory rate
Ti	s	inspiratory time
Te	s	expiratory time
TV/BW	ml/kg	tidal volume per body weight
MV/BW	ml/min/kg	minute volume per body weight
PIF/BW	ml/s/kg	peak inspiratory flow per body weight
PEF/BW	ml/s/kg	peak expiratory flow per body weight
Tr	ms	relaxation time; time at which 65% of tidal volume is exhaled
PAU	unitless	pause, [(Te/Tr)- 1]
Penh	unitless	enhanced pause, [((Te/Tr) - 1)x(PEF/PIF)]
PEF/EF50	unitless	quotient of peak expiratory pseudo-flow and expiratory flow at end expiratory volume plus 50% tidal volume

min: minute, s: second, ml: millilitre, kg: kilogram, ms: millisecond