Table 3.

Comparisons of ROC curves of the combined markers

Curve 1	Curve 2	SE	95% CI	Z value	p-value
Actinomycetaceae + Arachidonic acid	Actinomycetaceae + Arachidonic acid + IL-6	0.03	− 0.05 to 0.10	0.673	0.50
Actinomycetaceae + Arachidonic acid	Actinomycetaceae + IL-6	0.05	− 0.09 to 0.11	0.123	0.90
Actinomycetaceae + Arachidonic acid	Arachidonic acid + IL-6	0.05	− 0.09 to 0.09	0.000	1.00
Actinomycetaceae + IL-6	Actinomycetaceae + Arachidonic acid + IL-6	0.02	− 0.01 to 0.08	1.299	0.19
Actinomycetaceae + IL-6	Arachidonic acid + IL-6	0.03	− 0.06 to 0.07	0.178	0.85
Arachidonic_acid + IL-6	Actinomycetaceae + Arachidonic acid + IL-6	0.03	− 0.03 to 0.08	0.833	0.40

SE: standard error; CI: confidence interval; IL: interleukin. p was calculated by Delong test