PFS of CR vs non-CR in elderly patients with HL treated with BV plus DTIC. Censored patients are indicated on the graph. Analysis used Kaplan-Meier methodology and was based on 21 efficacy-evaluable patients; all 8 patients with non-CR had a response of partial remission. PD, progressive disease. See Figure 3 in the article by Friedberg et al that begins on page 2829.