1) Earlobe hair has a weak correlation, it's about earlobe crease (Fran's Sign). Correlation does not prove cause & effect relationship. Here are other positive correlation and coronary arterial disease (CAD) ...
2) Edston E., published his study in the June 2006 edition of the American Journal of Forensic Medical Pathology, found that ELC (earlobe crease) was strongly correlated with CAD in both men and women (P < 0.0001) but with sudden cardiac death (SCD) only in men (P < 0.04).” The study also indicated, the younger the patient, the higher was the positive predictive value.