Table 2. Accuracy of prognostic estimates.

	Predicted outcome	Actual outcome		Predictive value	95% CI
Mortality		Death	Alive
	Death	14	1	PPV 0.93	0.66–0.99
	Alive	16	29	NPV 0.64	0.49–0.78
				FPR 0.03	0.00–0.20
Functional outcome		Unfavorable	Favorable
	Unfavorable	42	3	PPV 0.93	0.81–0.98
	Favorable	7	7	NPV 0.50	0.24–0.76
				FPR 0.30	0.08–0.65
Quality of life		Non-satisfactory	Satisfactory
	Non-satisfactory	5	3	PPV 0.63	0.26–0.90
	Satisfactory	4	14	NPV 0.78	0.52–0.93
				FPR 0.18	0.05–0.44

CI, confidence interval; PPV, positive predictive value; NPV, negative predictive value; FPR, false positive rate