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JCI Insight. 2019 Mar 7;4(5). pii: 124865. doi: 10.1172/jci.insight.124865. eCollection 2019 Mar 7.

Changes in body composition and weight during the menopause transition.

Author information

1
Department of Medicine, Division of Geriatrics, UCLA, Los Angeles, California, USA.
2
Division of Research, Kaiser Permanente, Oakland, California, USA.
3
Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, Michigan, USA.
4
Graduate School of Public Health, Epidemiology Data Center, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
5
Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
6
Department of Medicine, Endocrine Unit, Massachusetts General Hospital, Boston, Massachusetts, USA.

Abstract

BACKGROUND:

The relation between the menopause transition (MT) and changes in body composition or weight remains uncertain. We hypothesized that, independent of chronological aging, the MT would have a detrimental influence on body composition.

METHODS:

Participants were from the longitudinal Study of Women's Health Across the Nation (SWAN) cohort. We assessed body composition by dual energy x-ray absorptiometry. Multivariable mixed effects regressions fitted piece-wise linear models to repeated measures of outcomes as a function of time before or after the final menstrual period (FMP). Covariates were age at FMP, race, study site, and hormone therapy.

RESULTS:

Fat and lean mass increased prior to the MT. At the start of the MT, rate of fat gain doubled, and lean mass declined; gains and losses continued until 2 years after the FMP. After that, the trajectories of fat and lean mass decelerated to zero slope. Weight climbed linearly during premenopause without acceleration at the MT. Its trajectory became flat after the MT.

CONCLUSION:

Accelerated gains in fat mass and losses of lean mass are MT-related phenomena. The rate of increase in the sum of fat mass and lean mass does not differ between premenopause and the MT; thus, there is no discernable change in rate of weight gain at the start of the MT.

FUNDING:

NIH, Department of Health and Human Services (DHHS), through the National Institute on Aging, National Institute of Nursing Research, and NIH Office of Research on Women's Health (U01NR004061, U01AG012505, U01AG012535, U01AG012531, U01AG012539, U01AG012546, U01AG012553, U01AG012554, and U01AG012495).

KEYWORDS:

Aging; Epidemiology; Metabolism; Obesity

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