Skip to main content

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