Table 5.

Cross tabulation of scores determined by the gold standard and categorization by radiation oncologists

	Gold standard			Total
Three-point Scale SINS by Radiation Oncologists	Stable	Potentially unstable	Unstable
Stable	170	18	0	188
Potentially Unstable	28	409	56	493
Unstable	0	134	175	309
Total	198	561	231	990

Gold Standard: score occurred most frequently among spine surgeons. Radiation oncologist first assessment (N = 30).