Thrombocytopenic purpura imatha kukhudza misinkhu yonse komanso amuna ndi akazi. Kwa achinyamata akuluakulu, zimakhudza akazi kuposa amuna. Mosiyana ndi zimenezi, pafupifupi zaka 50, amuna amakhudzidwa kwambiri kuposa akazi.

Rheumatoid purpura imakhudzanso kwambiri ana ndi ndi achichepere, omwe nthawi zambiri amakhala ndi zaka 5 zakubadwa. Anyamata angakhudzidwe kwambiri kuposa atsikana.