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Table 4 Correlation coefficients between the GRC (− 3 to + 3) and changes in scores (Δ = follow up score – baseline score)

From: “Minimal clinically important difference” estimates of 6 commonly-used performance tests in patients with chronic musculoskeletal pain completing a work-related multidisciplinary rehabilitation program

Changes in Scores Upper limb Lower limb Neck/Back
Δ 6MWT 0.351a 0.372a
Δ SRT 0.220a 0.184
Δ 1MSCT 0.424a 0.331a
Δ STS 0.067 −0.046
Δ JAM 0.338a
Δ PILE 0.312a 0.241a 0.171
  1. 6MWT: 6-Minute Walk Test, SRT Steep Ramp Test, 1MSCT 1-Minute Stair Climbing Test, STS Sit-To-Stand test, JAM Jamar dynamometer test, PILE Progressive Isoinertial Lifting Evaluation. aStatistically significant