Table 2

 Comparison of door to needle times and ambulance call to needle times for each group

Door to needle(min)Call to needle(min)
*Mann-Whitney U test. IQR, interquartile range.
Pre-change group median (IQR)64 (46–95)(n = 320)102 (83–129)(n = 275)
Post-change group median (IQR)35 (25–65)(n = 323)77 (59.5–106)(n = 273)
Estimated difference(95% CI)25 (20 to 29)23 (18 to 28)
p*<0.0001<0.0001