Table 7.

Results of automatic logistic regression analyses with melancholic depression (MEL MDD) versus non-MEL MDD as dependent variable and immune biomarkers, i.e., interleukin-1α, soluble interleukin 1 receptor antagonist (sIL-1RA), sIL-2R, sIL-6R, soluble tumor necrosis factor receptor 60 kDa/80 kDa (sTNF-R1/R2), and thiobarbituric acid reactive substances (TBARS), age, gender, drug state, nicotine dependence, and marital status as explanatory variables

Dependent variables	Explanatory variables	Wald	df	p	Odds ratio	lower and upper 95% CI
MEL MDD (versus non-MEL MDD)	IL-1α sIL-6R PC1 PC2	9.52 11.88 2.53 5.72	1 1 1 1	0.002 0.001 0.112 0.017	0.40 29.27 0.68 1.98	0.23–0.72 4.29–199.76 0.43–1.09 1.13–3.47

PC1, PC2: the first two varimax-rotated PC subtracted from the drug state data