RBP4 and coronary artery disorder: From these patients, 11 had positive parental history of CAD, with a mean RBP-4 of (9.6 ± 4.8) and 13 patients had negative parental history of CAD, with a mean RBP-4 (4.6 ± 3.2) the difference was statistically significant (P = 0.006).