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Table 4 Growth curve analyses for the 6MWT

From: Minimal important improvement thresholds for the six-minute walk test in a knee arthroplasty cohort: triangulation of anchor- and distribution-based methods

Parameter Estimate 95 % CI Sig
Intercept 490.0 398.2 to 581.8 <0.001
Magnitude of change 73.8 50.2 to 97.3 <0.001
Rate of change over time −20.5 −32.0 to -9.0 0.001
Gender 62.4 39.0 to 85.8 <0.001
Age −2.9 −4.2 to −1.5 <0.001
  1. Post-operative average distance of 6MWT at 10-weeks post-surgery can be calculated using the following equations where males are coded “0” and females are “1”
  2. Males: 490 + (1 × 73.8) + (1x -20.5) + (0 × 62.4) + (66.2 × −2.9), where 66.2 is the average age
  3. Females: 490.0 + (1 × 73.8) + (1x -20.5) + (1 × 62.4) + (66.8x -2.9), where 66.8 is the average age