The Association between Survival and the Pathologic Features of Periampullary Tumors Varies over Time

Table 4

Classification accuracy of CART analysis for 1-year and 3-year mortality.

	Training set				Testing set
	Total cases	Dead	Alive	% Accuracy	Total cases	Dead	Alive	% Accuracy
1-year mortality
Actual class
Dead	56	29	27	52%	56	17	39	30%
Alive	151	10	141	93%	151	15	136	90%
		Overall % Accuracy		82%		Overall % Accuracy		74%
3-year mortality
Actual class
Dead	113	88	25	78%	113	85	28	75%
Alive	74	25	49	66%	74	25	49	66%
		Overall % Accuracy		73%		Overall % Accuracy		72%

CART: Classification and Regression Trees.