A Cox proportional hazards regression model revealed that the hazard ratios (HRs)
for ITP and AIHA were 1.8 (95% confidence interval [CI], 1.4 – 2.3) and 2.8 (95% CI, 1.8 – 4.2), respectively.
"Because both ITP and AIHA have been previously associated with interferon alfa use, we were also interested in assessing pharmacy data to account for the effects of HCV treatment," write Dr. Chiao and colleagues.