Table 4 Correlations in MHD patients with weekly averaged accelerometer-measured daily physical activity and with the human activity profile (HAP) with no adjustments and with adjustment for covariates
Unadjusted Age, gender adjusted Age, gender, diabetes adjusted
R  p Value  R  p Value  R  p Value
Correlations with accelerometer-measured daily physical activity
Vintage (months) 0.266 0.024 0.252 0.035 0.257 0.033
Human activity profile
 Maximum activity score 0.277 0.019 0.102 0.403 0.101 0.410
 Adjusted activity score 0.366 0.002 0.206 0.087 0.207 0.087
Time spent by monitor readings (%)
 Sleep or marked physical inactivity −0.868 <0.0001 −0.881 <0.0001 −0.885 <0.0001
 Light activity 0.745 <0.0001 0.794 <0.0001 0.796 <0.0001
 ≥ Moderate activity 0.843 <0.0001 0.816 <0.0001 0.820 <0.0001
Day of HD 0.898 <0.0001 0.881 <0.0001 0.881 <0.0001
1-day-post-HD 0.948 <0.0001 0.942 <0.0001 0.942 <0.0001
2-days-post-HD 0.815 <0.0001 0.819 <0.0001 0.819 <0.0001
6-min walk distance (meters) 0.387 <0.0001 0.258 0.031 0.263 0.029
Sit-to-stand test (no. cycles in 30 s) 0.268 0.023 0.148 0.221 0.148 0.226
Stair-climbing test (seconds per 22 stairs) −0.283 0.016 −0.112 0.358 −0.111 0.363
Correlations with human activity profile
Maximum activity score vs.
 6-min walk distance (meters) 0.628 <0.0001 0.496 <0.0001 0.480 <0.0001
 Sit-to-stand test (no. cycles in 30 s) 0.623 <0.0001 0.534 <0.0001 0.533 <0.0001
 Stair-climbing test (seconds per 22 stairs) −0.707 <0.0001 −0.595 <0.0001 −0.584 <0.0001
Adjusted activity score vs.
 6-min walk distance (meters) 0.642 <0.0001 0.523 <0.0001 0.504 <0.0001
 Sit-to-stand test (no. cycles in 30 s) 0.581 <0.0001 0.481 <0.0001 0.479 <0.0001
 Stair-climbing test (seconds per 22 stairs) −0.608 <0.0001 −0.454 =0.0001 −0.437 =0.0002