Table 6 ROC analysis of ActivPal measures (normalised by wear time) for the assessment of physical frailty in people receiving haemodialysis

Daily steps/h (n°)

0.67 (0.53–0.82)

0.022

0.41

 ≤ 173.5

26 (45.6)

71.4%

69.4%

0.58

0.81

70.2%

Daily sit to stands/h (n°)

0.65 (0.51–0.80)

0.040

0.33

 ≤ 2.0

20 (35.1)

52.4%

75.0%

0.55

0.73

66.7%

Time spent sitting/lying (%)

0.48 (0.31–0.64)

0.773

0.08

 ≥ 71.05

49 (86.0)

81.0%

11.1%

0.35

0.50

36.8%

Time spent standing/stepping (%)

0.52 (0.36–0.69)

0.773

0.13

 ≤ 18.73

28 (49.1)

57.1%

55.6%

0.43

0.69

56.1%

Step cadence < 60 s/min

 Number of steps/h (n°)

0.57 (0.41–0.72)

0.411

0.21

 ≥ 38.28

24 (42.1)

28.6%

50.0%

0.25

0.55

42.1%

Step cadence 60–79 s/min

 Number of steps/h (n°)

0.54 (0.38–0.70)

0.638

0.16

 ≤ 32.06

24 (42.1)

52.4%

63.9%

0.46

0.70

59.6%

Step cadence 80–99 s/min

 Number of steps/h (n°)

0.62 (0.46–0.78)

0.138

0.26

 ≤ 62.72

26 (45.6)

61.9%

63.9%

0.50

0.74

63.2%

Step cadence 100–119 s/min

 Number of steps/h (n°)

0.78 (0.65–0.90)

 < 0.001

0.50

 ≤ 13.68

20 (35.1)

66.7%

83.3%

0.70

0.81

77.2%

Step cadence ≥ 100 s/min

 Number of steps/h (n°)

0.77 (0.63–0.90)

 < 0.001

0.50

 ≤ 14.17

20 (35.1)

66.7%

83.3%

0.70

0.81

77.2%

Step cadence ≥ 120 s/min

 Number of steps/h (n°)

0.73 (0.59–0.87)

0.001

0.44

 ≤ 0.83

25 (43.9)

71.4%

72.2%

0.60

0.81

71.9%