Correlates and determinants of physical activity in persons with spinal cord injury: A review using the International Classification of Functioning, Disability and Health as reference framework.

BACKGROUND: Participation in physical activity (PA) decreases after the onset of a spinal cord injury (SCI) and is generally low in persons with SCI.
OBJECTIVE: To provide an overview of findings on correlates/determinants of PA in persons with SCI applying the International Classification of Functioning, Disability and Health (ICF) to analyze and report results.
METHODS: A systematic literature review using the databases MEDLINE, PsycINFO, SSCI, and CINHAL was conducted. Independent variables were extracted and linked to ICF codes. Quality of evidence was rated using internationally accepted standards.
RESULTS: Overall, evidence quality of the 25 included studies is low. Environmental Factors were consistently found as correlates of PA, whereas Personal Factors (socio-demographics and psychological constructs) were weakly associated with PA in the SCI population. Associations with Body Functions, Body Structures, Activities and Participation and Health Conditions were less frequently studied.
CONCLUSION: Although quality of evidence of reviewed literature is low, results indicate that rather environmental barriers than the 'classical' socio-demographic factors known from social epidemiology correlate with PA in persons with SCI. There is insufficient evidence to draw conclusions concerning the association of Body Functions and Structures and Activity and Participation with PA. Future research is encouraged to better understand the interplay between functioning, contextual factors, health conditions and PA in SCI to establish a sound basis for intervention planning in this special needs population. In addition, our experience showed that linking study results to the ICF facilitates data analysis and reporting.