Actuarial disease-specific survival of 525 patients with MF and SS according to their clinical stage at diagnosis (stages IA-IV).¹²  For stage IA versus IB disease, P = .007; for stage IB versus IIA disease, P = .006; for stage IIA versus IIB disease, P < .001; for stage IIA versus III disease, P = .03; for stage IIB versus III disease, P = .09; and for stage IA-III versus IV disease, P < .001.