Psychological status and physical performance are independently associated with autonomic function

Area of Science:

• Gerontology
• Cardiovascular Physiology
• Autonomic Nervous System Research

Background:

• Falls in older adults are a significant global health concern.
• Previous research links autonomic function (HRV, BPV) and psychological factors to falls.
• The impact of physical activity and psychological status on autonomic dysfunction in older fallers requires further investigation.

Purpose of the Study:

• To investigate the relationship between psychological disorders, physical performance, and autonomic nervous system (ANS) function in older adults who have experienced falls.
• To test the hypothesis that older fallers exhibit poorer autonomic function, increased dependency, and psychological distress.
• To determine if physical performance and psychological status contribute to autonomic dysfunction in the elderly.

Main Methods:

• A cross-sectional survey of adults aged 60 years and older.
• Continuous non-invasive blood pressure monitoring during supine and standing positions.
• Assessment of psychological status (depression, anxiety, stress, fear of falling) and functional status (Time-Up-and-Go, functional reach, handgrip, Lawton's IADL scale).

Main Results:

• Lawton's Instrumental Activities of Daily Living (IADL) score was independently associated with systolic and diastolic blood pressure variability (SBPV & DBPV) in both supine and standing positions.
• Anxiety scores were independently associated with SBPV and DBPV during standing.
• Fallers demonstrated poorer autonomic function, greater IADL dependency, and higher anxiety levels compared to non-fallers.

Conclusions:

• Older fallers exhibit impaired autonomic nervous system (ANS) function, increased dependency in IADLs, and higher anxiety levels.
• IADL dependency and anxiety are significant predictors of autonomic dysfunction in older adults.
• These findings can inform clinical practice for identifying individuals at risk of autonomic dysfunction, thereby aiding in the prevention of falls and cardiovascular diseases.