1 Background and Purpose:Home-Time is a stroke outcome measure based on time spent at home following stroke. We hypothesised that Home-Time assessment would be feasible and valid using national data. Methods:We linked the Scottish Stroke Care Audit to routine healthcare data and calculated 90-day Home-Time for all strokes:2005-2017. We described prognostic validity (Spearman rank correlation) of Home-Time to baseline factors.Results:We were able to calculate Home-Time for 101,969 strokes (99.3% of total Scottish strokes). Mean Home-Time was 46 days (95%CI:45.8 to 46.2; range:0-90). Home-Time showed consistent correlation with our pre-specified prognostic factors, :age:rho-0.35 (95%CI:-0.35 to -0.36);NIHSS:-0.54 (95%CI:-0.52 to -0.55);Six Simple Variables (ordinal):-0.61 (95%CI:-0.61 to -0.62).Conclusions:Home-Time can be derived at scale using routine clinical data and appears to be a valid proxy measure of functional recovery. Other national databases could use Home-Time as a time and cost efficient measure of medium and longer term outcomes.