Accuracy of Preoperative Scoring Systems for the Prognostication and Treatment of Patients with Spinal Metastases

Table 4

Results of survival predictive accuracy and rate of agreement between predicted and actual survival for each scoring system.

Scoring system	Survival predictive accuracy		Rate of agreement
	Correct survival prediction	% correct	Weighted Cohen’s kappa	95% CI	Interpretation of agreement
Original Tokuhashi	36	59%	0.39	0.21–0.56	Fair
Revised Tokuhashi	44	72%	0.41	0.24–0.62	Moderate
Bauer	38	62%	0.41	0.23–0.58	Moderate
Modified Bauer	42	69%	0.50	0.28–0.70	Moderate
Sioutos	37	61%	0.26	0.03–0.45	Fair
Tomita	30	51%	0.43	0.23–0.63	Moderate
van der Linden	36	59%	0.17	0.02–0.36	Slight

of 61 patients. Kappa of 1 indicates perfect agreement; a kappa of 0 indicates agreement equivalent to chance; <0: less than chance agreement; 0.01–0.20: slight agreement; 0.21–0.40: fair agreement; 0.41–0.60: moderate agreement; 0.61–0.80: substantial agreement; 0.81–0.99: almost perfect agreement.