Dataset Information

Individual and joint trajectories of change in bone, lean mass and physical performance in older men.

ABSTRACT:

Background

Declines in bone, muscle and physical performance are associated with adverse health outcomes in older adults. However, few studies have described concurrent age-related patterns of change in these factors. The purpose of this study was to characterize change in four properties of muscle, physical performance, and bone in a prospective cohort study of older men.

Methods

Using repeated longitudinal data from up to four visits across 6.9?years from up to 4681 men (mean age at baseline 72.7?yrs. ±5.3) participating in the Osteoporotic Fractures in Men (MrOS) Study, we used group-based trajectory models (PROC TRAJ in SAS) to identify age-related patterns of change in four properties of muscle, physical performance, and bone: total hip bone mineral (BMD) density (g/m²) and appendicular lean mass/ht² (kg/m²), by DXA; grip strength (kg), by hand dynamometry; and walking speed (m/s), by usual walking pace over 6?m. We also described joint trajectories in all pair-wise combinations of these measures. Mean posterior probabilities of placement in each trajectory (or joint membership in latent groups) were used to assess internal reliability of the model. The number of trajectories for each individual factor was limited to three, to ensure that the pair-wise determination of joint trajectories would yield a tractable number of groups as well as model fit considerations.

Results

The patterns of change identified were generally similar for all measures, with three district groups declining over time at roughly similar rates; joint trajectories revealed similar patterns with no cross-over or convergence between groups. Mean posterior probabilities for all trajectories were similar and consistently above 0.8 indicating reasonable model fit to the data.

Conclusions

Our description of trajectories of change with age in bone mineral density, grip strength, walking speed and appendicular lean mass found that groups identified by these methods appeared to have little crossover or convergence of change with age, even when considering joint trajectories of change in these factors.

SUBMITTER: Cawthon PM

PROVIDER: S-EPMC7201689 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature

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Publications

Individual and joint trajectories of change in bone, lean mass and physical performance in older men.

Cawthon Peggy M PM Parimi Neeta N Langsetmo Lisa L Cauley Jane A JA Ensrud Kristine E KE Cummings Steven R SR Lane Nancy E NE Hoffman Andrew R AR Lapidus Jodi J Gill Thomas M TM McCulloch Charles E CE Stefanick Marcia L ML Kado Deborah M DM Drieling Rebecca R Orwoll Eric S ES

BMC geriatrics 20200505 1

<h4>Background</h4>Declines in bone, muscle and physical performance are associated with adverse health outcomes in older adults. However, few studies have described concurrent age-related patterns of change in these factors. The purpose of this study was to characterize change in four properties of muscle, physical performance, and bone in a prospective cohort study of older men.<h4>Methods</h4>Using repeated longitudinal data from up to four visits across 6.9 years from up to 4681 men (mean ag ...[more]

PMID: 32370738

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Dataset Information

Individual and joint trajectories of change in bone, lean mass and physical performance in older men.

Background

Methods

Results

Conclusions

Publications

Individual and joint trajectories of change in bone, lean mass and physical performance in older men.

Similar Datasets

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