Table 1

Variables suitable for use by bystanders from original BATT and their suggested lay application

Variable adapted from BATT	Suggested interpretation	Interpretation considerations	Points assigned in the sBATT
Age	Older age	>65 years of age	+2
Age	Older age	<65 years of age	+0
Consciousness	Eyes open, converses, follows simple commands	GCS 15*	+0
Consciousness	Eyes open, converses, follows simple commands	GCS <15	+4
Hypotension	Is the radial pulse present or absent?	Present: Systolic blood pressure ≥85 mm Hg†	+0
Hypotension	Is the radial pulse present or absent?	Absent: Systolic blood pressure <85	+4
Tachycardia	Is the radial pulse rate low, normal or fast?	Heart rate ≥100 beats per minute	+1
		Heart rate 50–99 beats per minute	+0
		Heart rate <50 beats per minute	+1
Trapped	Is the patient able to leave their vehicle	Trapped	+1
Trapped	Is the patient able to leave their vehicle	Not trapped	+0

*Range assessed in validation model.
†Minimum values extracted from literature review.27–30
BATT, Bleeding Audit Triage Trauma; GCS, Glasgow Coma Scale; sBATT, simplified Bleeding Audit Triage Trauma.