3.2.8. Correlations

In the study group we demonstrated a negative correlation between the plasma concentrations of anti-TPO antibodies and GSH (*r* = −0.854, *p* < 0.0001). We also observed a negative correlation between TAC in NWS (*r* = −0.704, *p* < 0.0001) and SWS (*r* = −0.759, *p* < 0.0001) and serum concentration of anti-TPO.

We also found a positive correlation between MDA in NWS and thyroglobulin antibodies (r = 0.851, *p* < 0.0001) as well as between LOOH in SWS and anti-TG (r = 0.839, *p* < 0.0001).

We showed a negative correlation between SOD activity in SWS and plasma glucose concentration (*r* = −0.851, *p* < 0.0001) in the HT group.

In the study group we found a negative correlation between GSH and AOPP concentrations in SWS (*r* = −0.730, *p* < 0.0001). Moreover, IL-1β correlated positively with LOOH concentrations (r = 0.886, *p* < 0.0001) and negatively with GSH levels in SWS (*r* = −0.849, *p* < 0.0001).

The minute flow of unstimulated saliva correlated negatively with IL-1β concentration in NWS (*r* = −0.891, *p* < 0.0001). We also observed a negative correlation between salivary α-amylase activity and TOS in NWS (*r* = −0.8, *p* < 0.0001). The remaining correlations were included in the supplementary materials.
