Sorry - no reference to share - but, for the most part, we only "report" cold autos if the DAT is pos with anti-C3D and they interfere with IS testing(XM or Reverse)......OR if the patient has evidence of hemolysis. That being said - once reported, we repeat the a full DAT profile (gel for Poly/IgG; tube for complement) at each visit. Once the DAT's are negative and there's no evidence of cold remaining in the IS testing on TWO successive visits, our techs can remove the "Cold". We then replace it with a comment stating "Pervious Warm/Cold" antibody. (So, that being said, we treat Warm's the same way)
We also do Thermal Amplitude testing when we have C3D pos DAT and pos reactions @ IS. Our Medical Director considers "colds" reactive at 28-30C clinically significant.