Research Article

Test-Retest Reliability, Validity, and Minimal Detectable Change of the Measurement of Lower Limb Muscular Strength with Handheld Dynamometry in Patients Undergoing Hemodialysis

Table 2

Test-retest: reliability outcomes.

Muscle groupTest: mean (SD) median (min-max)Retest: mean (SD) median (min-max)ICC (95% CI) value

Quadriceps R (Newton)84.6 (33.4)
79.2 (32.1–189.2)
79.0 (29.7)
76.3 (32.2–175.2)
0.81 (0.69–0.89)0.186
Quadriceps L (Newton)84.5 (26.9)
84.4 (27.3–154.7)
77.9 (29.4)
76.4 (27.1–159.1)
0.84 (0.69–0.91)
Hip flexors R (Newtons)78.8 (29.6)
82.8 (12.4–144.7)
73.5 (28.7)
70.9(13.3–150.6)
0.82 (0.69–0.90)0.244
Hip flexors L (Newtons)77.3 (28.1)
78.7 (19.9–144.5)
72.0 (29.2)
66.1 (23.5–162.8)
0.80 (0.67–0.89)
Triceps surae R (Newtons)60.7 (27.3)
55.5 (16.6–154.4)
58.4 (27.4)
53.5 (16.8–155.6)
0.76 (0.60–0.86)0.489
Triceps surae L (Newtons)63.5 (26.4)
59.0 (22.5–154.1)
56.4 (25.3)
54.6 (0.0–140.2)
0.38 (0.11–0.59)0.168
Hip adductors R (Newtons)57.9 (23.2)
54.6 (23.2–123.6)
56.0 (20.3)
56.6 (22.2–125.6)
0.82 (0.70–0.89)0.739
Hip Adductors L (Newtons)59.6 (22.2)
58.2 (22.4–129.5)
58.4 (21.8)
54.7 (25.1–117.0)
0.79 (0.66–0.88)0.573
Hip abductors R (Newtons)61.0 (15.4)
59.8 (28.2–111.0)
60.7 (16.1)
59.6. (35.4–112.0)
0.70 (0.52–0.82)0.638
Hip Abductors L (Newtons)63.7 (21.2)
61.8 (29.5–126.0)
65.4 (25.2)
59.2 (26.8–161.7)
0.76 (0.61–0.86)0.491
Hamstrings R (Newtons)75.0 (25.0)
73.5 (12.1–133.4)
70.5 (24.4)
65.9 (22.8–130.7)
0.91 (0.81–0.95)
Hamstrings L (Newtons)72.8 (24.6)
74.8 (25.3–123.6)
65.5 (23.6)
62.9 (22.6–125.5)
0.82 (0.59–0.90)

ICC: intraclass correlation coefficient—confidence intervals are also presented up to 95% of the mean; MDC: minimal detectable change, R: right; L: left; SD: standard deviation.