CCL2 and root mean square of the successive differences of inter beat intervals: On the other hand, a higher level of MCP1 was positively associated with markers of cardiovagal regulation, i.e., with increased rMSSD (r = 0.404, p = 0.007, pBH = 0.0182), lnLF-HRV (r = 0.401, p = 0.008, pBH = 0.0227), and lnHF-HRV (r = 0.396, p = 0.009, pBH = 0.0272).