NLRP1 and coronary artery disorder: To investigate the predictive value of platelet to lymphocyte ratio (PLR), monocyte to high‐density lipoprotein ratio (MHR) combined with nucleotide binding oligomeric domain like receptor protein 1 (NLRP1) for the severity of premature coronary heart disease (PCHD) and its 2‐year long‐term prognosis.