Trudy Mallinson, Heidi Fischer; Rehabilitation Research. Am J Occup Ther 2010;64(3):506-514. doi: 10.5014/ajot.2010.09080.
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Confirmatory factor analysis
Kruskal–Wallis one-way analysis
ANOVA with Tukey’s Honestly Significant Difference
Rasch Rating Scale analysis
Unpaired t test
Level I: Systematic reviews, meta-analyses, randomized controlled trials
Level II: Two groups, nonrandomized studies (e.g., cohort, case-control)
Level III: One group, nonrandomized (e.g., before and after, pretest and posttest)
Level IV: Descriptive studies that include analysis of outcomes (single-subject design, case series)
Level V: Case reports and expert opinion that include narrative literature reviews and consensus statements.
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