Table 4.

Comparison of performance of the outpatient scoring system on derivation set and validation set.

		Derivation set			Validation set
		Spinal metastasis	Spinal TB	Total	Spinal metastasis	Spinal TB	Total
Pathological diagnosis	Spinal metastasis	80	2	82	91	2	93
	Spinal TB	8	51	59	7	53	60
	Total	88	53	141	98	55	153
Sensitivity (%)		97.56			97.85
Specificity (%)		86.44			88.33