Long-term change in respiratory function following spinal cord injury

Area of Science:

• Pulmonary Medicine
• Neurology
• Rehabilitation Science

Background:

• Spinal cord injury (SCI) can impact respiratory function due to impaired neuromuscular control.
• Longitudinal studies are crucial for understanding the long-term effects of SCI on respiratory health.
• Previous research indicates potential declines in respiratory capacity post-SCI, but long-term data is limited.

Purpose of the Study:

• To model the longitudinal changes in respiratory function following spinal cord injury.
• To investigate the influence of patient characteristics such as age, BMI, and injury severity on respiratory function over time.
• To analyze long-term respiratory function trends in a cohort of individuals with SCI.

Main Methods:

• Retrospective analysis of respiratory function measures in 173 individuals with SCI.
• Utilized generalized linear regression models for longitudinal data analysis.
• Examined the impact of injury severity, age, gender, and BMI on time-dependent changes in respiratory function.

Main Results:

• No significant overall change in forced vital capacity (FVC) was observed over time in the SCI cohort (P=0.276).
• Significant differences in respiratory function over time were identified when stratifying by age and BMI.
• Subgroups showed altered respiratory function trajectories, particularly those older than 30 years at injury or with a BMI > 30 kg/m².

Conclusions:

• Long-term respiratory function in individuals with SCI remains stable overall, even over 23 years.
• Specific patient subgroups, including older individuals and those with obesity at injury onset, are at risk for declining respiratory function.
• These findings highlight the need for tailored respiratory monitoring and interventions in certain SCI populations.