Study design: Literature review. Objective: To critically review all publications/internet sites that have described/used the Walking Index for Spinal Cord Injury (WISCI II), as a measure of impairment of walking function after spinal cord injury (SCI), in order to identify its psychometric properties, clarify its nature, specify misuse and incorporate the findings in an updated guide. Method: A systematic literature search was done of Ovid MEDLINE, CINAHL, PsychINFO, Cochrane Central Register of Controlled Trials, Scopus and electronic sites using key words: WISCI or WISCI II, SCI, paraplegia/ tetraplegia/ quadriplegia and ambulation/gait/ walking. Among 1235 citations retrieved, 154 relevant articles/sites were identified, classified and examined by the authors; recommendations were made based on findings. Results and Discussion: The validity (face/concurrent/content/construct/convergent/criterion) and reliability of the WISCI II has been documented in clinical trials and clinical series, and considered adequate by systematic reviewers. In chronic SCI subjects, reliable determination of the maximum (as opposed to self-selected) WISCI II level requires more time and experience by the assessor. The correct use of WISCI II is clarified for testing acute/chronic phases of recovery after SCI, age of subjects, devices and settings. The WISCI II and walking speed measures may be performed simultaneously. Conclusion: The increased use of the WISCI II is attributed to its unique characteristics as a capacity measure of walking function and its strong metric properties. Appropriate use of the WISCI II was clarified and incorporated into a new guide for its use. Combining it with a walking speed measure needs further study. Keywords: walking function; WISCI; spinal cord injury; outcome measure; functional capacity scale
INTRODUCTIONThe Walking Index for Spinal Cord Injury (WISCI) is an ordinal scale that captures the extent and nature of assistance (combinations of orthoses, supporting equipment such as walkers and human helpers) that persons with spinal cord injury (SCI) require to walk. The original 19 levels, from unable to walk in spite of all possible supports to being able to walk without any, were rank-ordered by a panel of SCI experts to reflect gradations of impairment and their relationship to walking function. 1 The WISCI scale was modified the following year to the WISCI II with the addition of two levels. 2 Since its introduction, it has enjoyed increased popularity 3 and acceptance 4 as a capacity measure of walking function for use in clinical trials.International SCI experts 5,6 have, however, recommended that the WISCI II 2 be combined with the Ten Meter Walk Test (10MWT), another validated tool for quantifying walking function. Systematic reviews of the medical literature confirm the validity of the WISCI/ WISCI II 7 and its use together with the 10 MWT for assessment of ambulatory function. 8 It has been recommended by some, nonetheless, that the WISCI II undergo further evaluation. 6,7,9 Recent s...