able 2 Physical activity and physical performance; MHD patients vs. normal controls
MHD patients N = 72 Normal controls N = 39  p Value
Human activity profile
 Maximum activity score 82.5 (13.5) 92 (5) <0.0001
 Adjusted activity score 72 (22) 89 (5) <0.0001
Time spent by monitor readings (%)
 Sleep or marked physical inactivity 81.9 ± 5.8 72.8 ± 6.0 <0.0001
 Light activity 14.4 ± 4.4 20.0 ± 4.5 <0.0001
 ≥ Moderate activity 3.7 ± 2.1 7.2 ± 3.0 <0.0001
Average daily physical activity (vector magnitude)
 Daily physical activity (mean of 7 days) 395,727 (222,350) 636,112 (243,634) <0.0001
 Day of HD 327,250 (188,085)
 1-day-post-HD 442,720 (246,824)a
 2-days-post HD 393,353 (275,123)b
6-min walk distance (meters) 441.3 ± 121.9 617.6 ± 63.2 <0.0001
Sit-to-stand test (no. cycles in 30 s) 15.9 ± 5.3 26.2 ± 5.4 <0.0001
Stair-climbing test (seconds per 22 stairs) 15.8 ± 11.0 9.8 ± 1.1 <0.0001
Data expressed as mean ± standard deviation. Non-normally distributed data are expressed as median values with the interquartile range (IQR, i.e., the arithmetic difference between the 25th percentile value and the 75th percentile value) shown in parentheses
a1-day-post-HD vs day of HD p = 0.018
b2-days-post-HD vs day of HD p = 0.057; 1-day-post-HD vs 2-days-post-HD p = 0.441