Time intervals for the 3 imaging groups
| Time (min) (Median) (IQR) | CTP+CTA (n = 90) | CTA (n = 216) | NCCT (n = 342) | P Value |
|---|---|---|---|---|
| Onset to ED arrival | 55.5a (41–80) | 51 (38–69) | 48 (33–67) | .0216 |
| ED arrival to start of imaging | 19.5 (14–26) | 21a (14–28) | 18 (10–25) | .0016 |
| Imaging start to IV tPA initiation | 40a (29–54) | 38 (24–51) | 47 (33–64) | .0001 |
| Onset to IV tPA initiation | 120.5 (100–160) | 117.5 (96–145) | 120 (97–145) | .5762 |
| ED to IV tPA initiation | 62 (50–75) | 59.5 (47–77) | 65.5 (49–86) | .1554 |
| IV tPA start to groin punctureb | 77.5 (58.5–105.5) | 81a (65–96) | 91 (66–115) | .0043 |
| Imaging to groin punctureb | 124a (97–155.5) | 119a (95–140) | 142 (115–170.5) | <.0001 |
| ED to groin punctureb | 146.5 (118.5–182.5) | 144a (120–167) | 160 (132–191) | .0008 |
| Groin puncture to EVT startc | 30a (26–45) | 38a (25–56) | 44 (34–60) | .0001 |
| EVT start to EVT finishc | 63 (20–115) | 46a (14–83) | 74 (42–119) | <.0001 |
Note:—IQR indicates interquartile range.
↵a Significant pair-wise difference between the imaging subgroup and the NCCT group.
↵b Applicable only to subjects with groin puncture: CTP+CTA (n = 60), CTA (n = 150), NCCT (n = 210).
↵c Applicable only to subjects who received endovascular therapy with non-missing start time: CTP+CTA (n = 49), CTA (n = 117), NCCT (n = 159).