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01-04-2017 | Original Article

Rest-activity patterns and falls and fractures in older men

Authors: Tara S. Rogers, Terri L. Blackwell, Nancy E. Lane, Greg Tranah, Eric S. Orwoll, Jane A. Cauley, Sonia Ancoli-Israel, Katie L. Stone, Steven R. Cummings, Peggy M Cawthon

Published in: Osteoporosis International | Issue 4/2017

Abstract

Summary

Dysregulated rest-activity rhythm (RAR) patterns have been associated with several health conditions in older adults. This study showed that later acrophase was associated with a modestly greater risk of falls but not fractures in elderly men. Associations between dysregulated RAR patterns and osteoporosis risk warrant further investigation.

Purpose

The purpose of this study was to investigate the relationship between rest-activity rhythm (RAR) patterns and risk of falls/fractures in older men. We hypothesized that dysregulated RAR would be associated with incident falls/fractures.

Methods

We used wrist-worn actigraphy to measure RAR over 4.8 ± 0.8 24-h periods in men (≥67 years) enrolled in the multicenter Outcomes of Sleep Disorders in Men (MrOS Sleep) Study (n = 3001). Men were contacted every 4 months to report occurrence of falls/fractures. RAR parameters included amplitude (difference between peak and nadir activity in counts/minute), mesor (activity counts/minute), acrophase (time of day of peak activity), and pseudo-F statistic (rhythm robustness) and were evaluated as continuous variables with associations reported per SD increase/decrease in models adjusted for confounders. Logistic regression was used to estimate the likelihood (odds ratio, OR) of recurrent falls in the year after the visit. Proportional hazards models were used to estimate the risk (hazard ratio, HR) of fractures.

Results

One year after the visit, 417 men (14%) had recurrent (≥2) falls. Later acrophase (OR 1.18, 95% CI 1.06–1.32) was associated with a modestly greater likelihood of falls. In 8.6 years (SD 2.6 years) of >97% complete follow-up, 256 men (8.53%) had a major osteoporotic fracture, 85 (2.8%) had a clinical spine fracture, and 110 (3.7%) had a hip fracture. No consistent, significant associations were observed between RAR patterns and fractures.

Conclusions

Later acrophase was associated with a modestly greater risk of falls; this association did not translate into a higher fracture risk in this cohort of elderly men.

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Title: Rest-activity patterns and falls and fractures in older men
Authors: Tara S. Rogers
Terri L. Blackwell
Nancy E. Lane
Greg Tranah
Eric S. Orwoll
Jane A. Cauley
Sonia Ancoli-Israel
Katie L. Stone
Steven R. Cummings
Peggy M Cawthon
Publication date: 01-04-2017
Publisher: Springer London
Published in: Osteoporosis International / Issue 4/2017
Print ISSN: 0937-941X
Electronic ISSN: 1433-2965
DOI: https://doi.org/10.1007/s00198-016-3874-2

ACC 2024 Congress

Springer Medicine

Rest-activity patterns and falls and fractures in older men

Abstract

Summary

Purpose

Methods

Results

Conclusions

ACC 2024 Congress

Springer Medicine

Abstract

Summary

Purpose

Methods

Results

Conclusions

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