LPA and myocardial infarction: Using a lower-risk reference category of Lp(a)-levels <22nd percentile Kamstrup and colleagues found somewhat higher multivariable-adjusted HRs for myocardial infarction with 1.6 for Lp(a) levels in the 67–89th percentile, 1.9 for 90–95th percentile, and 2.6 for ≥95th percentile.5