APOA1 and diabetes mellitus: Small proportions of the family history effect were mediated by metabolic risk factors: 8.3% (95% CI: 5.8–11.7%) by the apoB pathway, 1.7% (95% CI: 0.2–3.4%) by apoA‐I, 8.5% (95% CI: 5.9–12.0%) by blood pressure, and 1.5% (95% CI: −0.8% to 3.8%) by diabetes mellitus.