BDNF and cervicitis: Logistic regression analysis showed that the HIV status is an independent predictor of BDNF expression in pre-invasive preneoplastic cervical disease when considered alone (crude OR 4.6, 95% CI 0.027–20.347; p = 0.046) and when analyzed with other co-factors (adjusted OR 6.786, 95% CI 1.084–42.476; p = 0.041).