Table 3.

Three-Year Conditional Disease-Free Survival From Years 0 to 5 After Surgery

Variable	3-y Conditional Disease-Free Survival, %
	0 y	1 y	2 y	3 y	4 y	5 y
Modified NIH criteria
Very low risk	91	92	92	92	100	100
Low risk	95	91	90	90	97	100
Intermediate risk	95	90	92	94	92	79
High risk	65	68	71	85	83	94
MSKCC GIST nomogram
Quartile 4	91	92	92	92	100	100
Quartile 3	95	91	90	90	97	100
Quartile 2	94	90	91	95	92	79
Quartile 1	62	65	68	83	82	94
Tumor size, cm
<5.0	95	92	92	92	98	100
5.0–10.0	80	78	80	88	89	85
>10.0	62	64	69	83	81	90
Tumor site
Gastric	85	85	88	93	91	90
Nongastric	78	74	69	77	87	100
Mitotic rate, per 50 HPFs
≤5	93	91	91	92	94	91
6–10	85	88	88	92	92	100
>10	48	50	55	74	69	83

Abbreviations: GIST, gastrointestinal stromal tumor; HPFs, high-power fields; MSKCC, Memorial Sloan Kettering Cancer Center; NIH, National Institutes of Health; TKI, tyrosine kinase inhibitor.