The date and time at which the patient was last known to be without the signs and symptoms of the current stroke or at his or her prior baseline. This element captures the date and time for last known well that is determined to be the most accurate after all the data have been evaluated and additional witnesses interviewed (if applicable).

Data Sharing Instructions: When date/time data are prepared for aggregation or sharing they should be converted to the format specified by ISO 8601, YYYY-MM-DDThh:mm:ss.

2014-04-01

Last known to be well date and time

STROKE: Get With The Guidelines (GWTG) Stroke Patient Management Tool Coding Instructions (Updated on 11/4/2009); Paul Coverdell National Acute Stroke Registry

STROKE: When was the patient last known to be well (i.e., in their usual state of health or at their baseline), prior to the beginning of the current stroke/TIA? (To within 15 minutes of exact time is acceptable). If there are multiple times of "last known well" documented, either because subsequent more accurate information became available or because of different levels of expertise in sorting out the actual time of "last known well", use the time recorded according to the following hierarchy: (1) stroke team/neurology; (2) admitting physician; (3) emergency department physician; (4) ED nursing notes; (5) EMS Record the date/time according to the ISO 8601, the International Standard for the representation of dates and times (http://www.iso.org/iso/home.html). The date/time should be recorded to the level of granularity known (e.g., year, year and month, complete date plus hours and minutes, etc.).

Date and Time patient last known to be well