Influenza A , B and coronavirus antibody titers were measured in 257 subjects with recurrent unipolar and bipolar disorder and healthy controls , by SCID .
Pearson 's χ² tests and logistic regression models were used
Influenza A , B and coronavirus antibody titers were measured in 257 subjects with recurrent unipolar and bipolar disorder and healthy controls , by SCID .
Pearson 's χ² tests and logistic regression models were used to analyze associations between seropositivity for coronaviruses , influenza A and B viruses and the following : a ) history of recurrent mood disorders b ) having attempted suicide in the past c ) uni - vs . bi - polarity and d ) presence of psychotic symptoms during mood episodes .