Accelerometer-Measured Sedentary Patterns are Associated with Incident Falls in Older Women

Area of Science:

• Gerontology
• Public Health
• Epidemiology

Background:

• Falls pose significant health challenges for older adults.
• Increased sedentary time is linked to reduced physical function and elevated fall risk.

Purpose of the Study:

• To investigate the association between sedentary time, sedentary bout duration, and fall incidence in older women.
• To explore if a history of falls modifies the relationship between sedentary behavior and future falls.

Main Methods:

• Prospective observational study involving 5,545 older women (mean age 79).
• Sedentary time and mean sedentary bout duration measured using hip accelerometers for up to 1 week.
• Fall incidence tracked via monthly calendars for up to 13 months.

Main Results:

• The highest quartile of mean sedentary bout duration was associated with a significantly increased risk of falling (IRR 1.17; 95% CI 1.01-1.37).
• No significant association was found for quartiles of total sedentary time.
• Women with a history of two or more falls showed a stronger association between sedentary time and falls (P-interaction = .046).

Conclusions:

• Prolonged sedentary bout duration is a significant risk factor for falls in older women.
• Individuals with a history of frequent falls may be particularly vulnerable to the negative effects of sedentary behavior.
• Further research and interventions are needed to determine if reducing sedentary time and bout duration can mitigate fall risk.