Impact on survival of CTAg-specific immunity in MM patients. A Kaplan-Meier survival curve was constructed for 52 patients with myeloma who had been screened for CTAg-specific immune responses. — represents MM patients in whom a CTAg-specific T-cell response could be detected; ----, MM patients who were negative. The hazard ratio between the CTAg-positive and -negative groups is 0.457 (95% CI 0.203-1.03) with P = .052 by log-rank test.