Estimated disease-free survival according to treatment arms. Broken line indicates MOPP/ABV×8 (patients at risk, n = 84; relapses or deaths, n = 20; 10-year estimate, 76%); solid black line, ABVPP × 8 (patients at risk, n = 115; relapses or deaths, n = 34; 10-year estimate, 70%); light gray line, MOPP/ABV×6 with RT (patients at risk, n = 108; relapses or deaths, n = 18; 10-year estimate, 79%); and dark gray line, ABVPP×6 with RT (patients at risk, n = 87; relapses or deaths, n = 22; 10-year estimate, 76%).