Table 3.

Performance metrics of the 90-day mRS prediction model in internal and external validation.

	R 2	MAE (95% CI)	% correct	% correct within 1 point	% correct within 2 points	% correct within 3 points
Internal cross-validation†	0.60	0.88 (0.82–0.94)	37	80	96	99
External validation (DEFUSE 3 trial data)
Combined control and EVT arms	0.60	0.94 (0.80–1.07)	34	78	96	99
Control arm only	0.50	1.04 (0.84–1.24)	29	74	95	99
EVT arm only	0.62	0.85 (0.67–1.02)	38	81	96	100

R², correlation coefficient.

MAE, mean absolute error.

EVT, endovascular therapy.

^†values represent means and 95% confidence interval of the values from the five cross-validation iterations.