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Table 1 Summary of studies using the Performance Scales© 1999-2016

From: The Performance Scales disability measure for multiple sclerosis: use and sensitivity to clinically important differences

  All citations (n = 82) Forest plots citations (n = 12)
Study Type n % n %
 Observational 60 73% 11 92%
 Intervention 5 6% 1 8%
 Measurement Validation 17 21% 0 0%
Design Type
 Cross Sectional 51 62% 6 50%
 Longitudinal 29 35% 6 50%
 Randomized Controlled Trial 2 2% 0 0%
Participant Source
 NARCOMS 43 52% 7 58%
 Vetrans Health Administration 10 12% 1 8%
 Midwest Chapters, National MS Society 5 6% 0 0%
 Cleveland Clinic Mellen Center 9 11% 2 17%
 Other 15 18% 2 17%
Funding Sourcea
 Internal/Academic 8 10% 2 17%
 Industry 21 26% 4 33%
 Federal 25 30% 2 17%
 Foundation 51 62% 8 67%
 Not Specified 11 13% 0 0%
  1. aStudies may have more than 1 funding source