Table 6.

Diagnostic Characteristics of the Serum IL-6 Tertiles

Characteristics	Mortality	Intubation	Discharge	LOS >14 days
Sensitivity	59.3%	56.6%	23.2%	35.1%
95% CI	53.6-64.8%	51.1-62%	20.4-26.3%	30.5-40%
Specificity	76.8%	76.8%	40.7%	68%
95% CI	73.7-79.6%	73.7-79.8%	35.2-46.4%	64.3-71.4%
Positive Predictive Value	49.1%	50.9%	50.9%	38.8%
95% CI	43.9-54.3%	45.7-56.1%	45.7-56.1%	33.8-44%
Negative Predictive Value	83.3%	80.6%	16.7%	64.5%
95% CI	80.4-85.9%	77.6-83.4%	14.1-19.6%	60.9-67.9%
Area under the Curve	0.73	0.72	0.73	0.53
95% CI	0.70-0.76	0.69-0.75	0.70-0.76	0.49-0.56