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Table 3

Results of responder analyses

These data were obtained after dichotomizing the within-person changes in outcomes from baseline to 4-weeks. The percentages listed in the table reflect the proportion of patients within each group that achieved at least a 30% or 50% reduction in clinical outcomes. These levels of outcome reductions are considered “moderate improvement” and “substantial improvement” respectively27,28.

OutcomeManualMechanicalMedical
Week 4;
≥ 30% reduction disability
(OSW)
76%50%48%
Week 4;
≥ 50% reduction disability
(OSW)
50%16%39%
Week 4;
≥ 30% reduction pain
(NPR)
94%69%56%
Week 4;
≥ 50% reduction pain
(NPR)
76%47%41%

OSW: Oswestry Low Back Pain Disability Index; NPR: Numeric Pain Rating.

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