The results of the model showed that ethnicity (p=0.0008) and depression (p=0.0134) were significantly related to adherence, whereas the relationships of the other variables were not significant [age (p=0.33), viral load (p=0.26), CD4+ T lymphocyte count (p=0.5), marital status (p=0.47), education (p=0.53), transmission (p=0.28), and sexual orientation (p=0.37)] (Table 5). This evidence concerns the gene CD4 and major depressive disorder.