. Author manuscript; available in PMC: 2018 Mar 7.

Published in final edited form as: Brain Behav Immun. 2015 Aug 28;52:11–17. doi: 10.1016/j.bbi.2015.08.017

Table 2.

Summary of significant associations: Univariate linear regression

Salivary Measure	Positive Association	Negative Association	Gender Effect
S-IgA	Protein Concentration
IgA1	Protein Concentration	PSS (Stress)
IgA2	Protein Concentration Age		Higher in Men
SC	Protein Concentration BDI (Depression) UCLA (Loneliness)
S-IgA/SC
IgA1/SC		PSS (Stress) BDI (Depression) UCLA (Loneliness)	Higher in Women
IgA2/SC	Age	BDI (Depression)

IgA1: Immunoglobulin A subclass 1; IgA2: Immunoglobulin A subclass 2; S-IgA: Secretory Immunoglobulin A; SC: Secretory Component; BDI: Beck Depression Inventory; PSS: Perceived Stress Scale; UCLA: University of California at Los Angeles Loneliness Scale.