Included: all patients who were scanned are included in this indicator.
| Excluded: Patients who were not scanned are excluded from this indicator |
For patients newly arriving at hospital, the time between clock start and scan is the difference between the date and time of arrival (Q 1.13) and the date and time of scan (Q 2.4).
For patients already in hospital at the time of their stroke (Q 1.10 is ‘Yes’), the time between clock start and scan is the difference between the date and time of symptom onset (Q 1.11) and the date and time of scan (Q 2.4).
Cohort median: To find the median time, all the times between clock start and scan need to be listed from smallest to largest. The median is then the number in the middle of this list.
| For team-centred | For patient-centred |
| All patients in the team-centred 72h cohort who receive a scan | All patients in the patient-centred 72h cohort who receive a scan |
Example
Patient A arrived (clock start) at hospital at 12:57 on Tuesday. They were scanned at 13:18 that same day. Patient A’s time from clock start to scan was 0:21.
Patient B arrived (clock start) at hospital at 09:15 on Friday. They were scanned at 10:16 that same day. Patient B’s time from clock start to scan was 1:01.
Patient C arrived (clock start) at hospital at 13:08 on Sunday. They were not scanned so are excluded.
Patient D arrived (clock start) at hospital at 07:00 on Friday. They were scanned at 07:38 that same day. Patient D’s time from clock start to scan was 0:38.
Patient E arrived (clock start) at hospital at 03:15 on Monday. They were scanned at 04:47 that same day. Patient E’s time from clock start to scan was 1:32.
Patient F arrived (clock start) at hospital at 23:33 on Friday. They were scanned at 00:03 on Saturday. Patient F’s time from clock start to scan was 0:30.
Listing in numerical order: 0:21 0:30 
The cohort median is 0 hours 38 minutes.