Defining Severity Levels for Post-Stroke Upper Limb Motor Impairment and Activity Limitation: A Systematic Review

Area of Science:

• Neurology
• Rehabilitation Medicine
• Clinical Research Methodology

Background:

• Stroke frequently causes upper limb motor impairment and activity limitations.
• Current terminology for describing stroke-related upper limb impairment severity is inconsistent.
• This lack of standardization impedes data aggregation from clinical trials and evidence-based practice.

Purpose of the Study:

• To systematically review and synthesize the descriptors of severity levels for post-stroke upper limb motor impairment and activity limitation.
• To identify common measures and cut-off scores used in published literature.
• To highlight the need for standardized clinical language in stroke rehabilitation.

Main Methods:

• A systematic literature search was conducted across eight major databases following PRISMA guidelines.
• Inclusion criteria focused on primary research studies involving adults post-stroke with described upper limb motor impairment or activity limitation severity.
• Studies were classified based on descriptor precision: 'green' (recommended measures/cut-offs), 'red' (descriptors only), and 'amber' (intermediate).

Main Results:

• Out of 17,273 records, 750 studies were included in the review.
• The most frequent severity descriptors were 'mild,' 'moderate,' and 'severe,' used in 77% of studies.
• For the Fugl-Meyer Assessment (Upper Extremity), severity ranges were identified, but limited data prevented further comprehensive analysis.

Conclusions:

• A significant lack of standardization exists in defining and operationalizing the severity of post-stroke upper limb motor impairment and activity limitation.
• The findings underscore the necessity for developing a standardized clinical language.
• Standardization will improve the consistency of research findings and enhance clinical practice for stroke patients.