RPA1 and infection: We found an odds ratio of 6.604 (p .019, 95% CI, 1.4 to 32.1) for low grade HCMV-IEA infection and odds ratio for RPA class III and IV was; 8.2 (p .002, 95% CI, 2.1 to 31) in patients with low-grade HCMV-IEA infection.