Table 1.

Measurement of the blast overpressure and impulse output from the compressed air blast wave generator

Group	Blast nozzle distance (cm)	Mean peak overpressure (95% CI) (kPa)	Mean impulse at 1.5 mS duration (95% CI) (sPa)
High	1.5	1,665 (1,604–1,725)	420.5 (412.8–428.2)
Medium	3.0	962.6 (897.2–1,028)	256.4 (241.7–271.2)
Low	5.0	398.1 (356.4–439.8)	119.7 (110.3–129.2)
Sham	N/A	0	0

The impulse was calculated at a representative time 1.5 ms from the onset of shock wave initiation. CI, confidence interval.