Based on multivariate logistic regression model , age over 35 years old ( odds ratio [ OR ] = 7.01 , P = 0.002 ) , human immunodeficiency virus infection ( OR = 40.4 , P < 0.001 ) , diabetes mellitus ( OR = 37.6 , P = 0.001 ) , and placebo treatment ( OR = 0.1 , P = 0.01 ) were identified as predisposing factors for ATDH .