|Study Group||N||No. of Affected Coronary Index Vessels||p Value|
|Iceland||2,330||0.245||0.061||5.8 × 10–5|
|Atlanta-European American||2,718||0.281||0.052||6.3 × 10–8|
|Combined||5,588||0.267||0.038||4.8 × 10–12|
CAD = coronary artery disease; LPA = apolipoprotein(a) gene.
↵⁎ Linear regression coefficients (β) with corresponding standard errors (SE) and p values, assuming additive allelic effects. Age at angiography and sex were included as covariates in the model for each study group. In the combined analysis additional adjustments were made for study group (site/ethnicity).