Obesity

Metabolically healthy obesity and risks of cardiovascular disease and all-cause mortality, a matched cohort study: the Shizuoka study

Int J Obes (Lond)Published Matched cohort study

Authors' conclusion

Obesity, when accompanied by a healthy metabolic profile, did not increase the risk of cardiovascular outcomes and all-cause mortality.

Study context

Population
Individuals aged <65 years in a Japanese health insurance dataset with annual health checkup data (Shizuoka study)matched cohort
Participants
168,699 individuals
Exposure
Metabolically healthy obesity vs non-obesity
  • Metabolically healthy obesityn = 8,644
  • Non-obesityn = 8,644reference
Outcome
Incidence rates of stroke, MI and all-cause mortality
Methodological detailsclinical profile-matched, health insurance dataset with annual health checkup data
  • Clinical profile-matched
  • Health insurance dataset with annual health checkup data

Main finding

As reported in the abstract

Stroke, MI and all-cause mortality incidence rates
GroupValueMI incidence rateAll-cause mortality incidence rate
Metabolically healthy obesity9.2 per 10,000 person-years3.726.6
Non-obesity10.53.123.2

Value

Metabolically healthy obesity9.2 per 10,000 person-years
Non-obesity10.5

MI incidence rate

Metabolically healthy obesity3.7
Non-obesity3.1

All-cause mortality incidence rate

Metabolically healthy obesity26.6
Non-obesity23.2
  • Metabolically healthy obesity vs Non-obesity: log-rank test p = 0.595 — per_group value = stroke incidence rate
  • Metabolically healthy obesity vs Non-obesity: P = 0.613
  • Metabolically healthy obesity vs Non-obesity: P = 0.304

Observational data: associations, not effects.

Further findings

Metabolically unhealthy obesity vs non-obesity (n = 10,965 each)

Lack of association also observed

Metabolic profiles · 5.6-year follow-up

Negligibly worse metabolic profiles with metabolically healthy obesity than non-obesity

Original publication

Metabolically healthy obesity and risks of cardiovascular disease and all-cause mortality, a matched cohort study: the Shizuoka study. Int J Obes (Lond). Published 18 May 2024. doi:10.1038/s41366-024-01541-3

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