Lipids & metabolic liver disease

Long-term sex differences in atherosclerotic cardiovascular disease in individuals with heterozygous familial hypercholesterolaemia in Spain: a study using data from SAFEHEART, a nationwide, multicentre, prospective cohort study

Lancet Diabetes EndocrinolPublished Prospective cohort study

Main finding · Incident ASCVD during follow-upResult — go to the resultAdjusted hazard ratio 1.90 95% CI 1.49–2.42

Authors' conclusion

Our findings suggest that the burden and risk of ASCVD are markedly lower in females than males with familial hypercholesterolaemia. The impact of sex needs to be considered to improve risk stratification and personalised management in patients with heterozygous familial hypercholesterolaemia.

Study context

Population
Adults aged ≥18 years with genetically confirmed familial hypercholesterolaemia in SAFEHEART, 25 tertiary care hospitals and one regional hospital in Spain; mean age 46.1 years
Participants
3,506 adults
Exposure
Males vs females with heterozygous familial hypercholesterolaemia
  • Malesn = 1,608
  • Femalesn = 1,898reference
Outcome
Sex differences in risk and burden of atherosclerotic cardiovascular disease (ASCVD), over follow-up and over the life course
Follow-up
Median 10.3 years (IQR 6.4-13.0)
Methodological detailsnationwide, multicentre, long-term, Data obtained Jan 26, 2004, to Nov 30, 2022
  • Nationwide
  • Multicentre
  • Long-term
  • Data obtained Jan 26, 2004, to Nov 30, 2022

Main finding

Incident ASCVD during follow-up · median follow-up 10.3 years

Adjusted hazard ratio

1.90

95% CI 1.49–2.42

P < 0.0001

Events by group

Malesvs Females
aHR 1.90 (95% CI 1.49–2.42); P < 0.0001

As reported in the abstract

Observational data: associations, not effects.

Further findings

Mean on-treatment LDL-C · median follow-up

Absolute LDL-C reduction over time · similar in both sexes

P = 0.98

CVD at enrolment

P < 0.0001

OutcomeFemalesMalesEstimateP value
MACE-free survival from birthMACE-free survival lower in males · median, years90.1 (95% CI 86.5-not estimable)71.0 (95% CI 69.2–74.6)HR for MACE 3.52 (95% CI 2.98–4.16)P < 0.0001
Age at which 25% had a MACE74.9 years55.5 years
Cardiovascular death · during follow-upaHR for cardiovascular death 1.74 (CI 1.11–2.73)

Median age at first ASCVD event (mostly coronary artery disease)

P < 0.0001

Original publication

Long-term sex differences in atherosclerotic cardiovascular disease in individuals with heterozygous familial hypercholesterolaemia in Spain: a study using data from SAFEHEART, a nationwide, multicentre, prospective cohort study. Lancet Diabetes Endocrinol. Published 1 August 2024. doi:10.1016/s2213-8587(24)00192-x

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