# Isokinetic Strength in Peritoneal Dialysis Patients: A Reliability Study
## 3 Results  
The characteristics of patients undergoing PD are reported in Table 1. The mean age was 48.45 (13.39) and the mean body mass index (BMI) was 24.35 (3.67), which is close to the overweight threshold. Differences between men and women were observed in age, body composition, height, and weight. In general terms, there was sedentary behavior, with more than 18 h/day of sedentary time and about 5000 daily steps. Table 2 shows the peak torque and work at 60\({}^{\circ}\)/s in each of the two repetitions for all variables. There were no statistically significant differences in any test. In general, the mean peak torque and work of male patients were higher than values from female participants. Table 3 summarizes the ICC values and the 95% confidence intervals, as well as the SEM and SRD in absolute values and percentages. All knee peak torque and work measures had an ICC greater than 0.90, which is excellent according to the classification by [PERSON], [PERSON], and [PERSON] [18]. On the other hand, peak torque in the elbow concentric extension in males and work in the elbow concentric extension in males and the general population showed an ICC lower than the threshold for excellent \begin{table}
\begin{tabular}{l c c c} \hline \hline  & **All** & **Men (N = 19)** & **Women (N = 12)** \\ \hline \multicolumn{4}{l}{**Anthropometric and Body Composition Measurements**} \\ \hline Age (years) & 48.45 \(\pm\) 13.39 & 52.42 \(\pm\) 11.54 \({}^{\star}\) & 42.16 \(\pm\) 14.16 \\ Height (cm) & 162.19 \(\pm\) 9.67 & 167.63 \(\pm\) 6.80 \({}^{\star}\) & 153.58 \(\pm\) 6.89 \\ Weight (kg) & 64.29 \(\pm\) 9.45 & 67.40 \(\pm\) 7.88 \({}^{\star}\) & 59.37 \(\pm\) 9.95 \\ BMI (kg/m\({}^{2}\)) & 24.35 \(\pm\) 3.67 & 23.82 \(\pm\) 3.37 & 25.20 \(\pm\) 4.10 \\ Body fat percentage & 27.79 \(\pm\) 8.49 & 23.23 \(\pm\) 5.25 & 35.01 \(\pm\) 7.65 \({}^{\star}\) \\ Body lean percentage & 68.58 \(\pm\) 8.23 & 72.92 \(\pm\) 5.14 \({}^{\star}\) & 61.70 \(\pm\) 7.58 \\ \hline \multicolumn{4}{l}{**Physical Activity Levels**} \\ \hline Sedentary time (h/day) & 19.34 \(\pm\) 1.61 & 19.44 \(\pm\) 1.86 & 19.15 \(\pm\) 1.11 \\ Light physical activities (h/day) & 3.50 \(\pm\) 1.54 & 3.43 \(\pm\) 1.77 & 3.63 \(\pm\) 1.09 \\ Moderate and vigorous activities (h/day) & 0.28 \(\pm\) 0.26 & 0.27 \(\pm\) 0.26 & 0.29 \(\pm\) 0.27 \\ Number of daily steps & 5157.18 \(\pm\) 2483.80 & 5005.63 \(\pm\) 2698.69 & 5429.98 \(\pm\) 2149.99 \\ \hline \multicolumn{4}{l}{**Lipid Profile and Other Parameters**} \\ \hline Serum cholesterol (mg/dL) & 182.12 \(\pm\) 31.42 & 183.00 \(\pm\) 31.22 & 180.75 \(\pm\) 33.09 \\ Serum high-density lipoprotein (mg/dL) & 45.35 \(\pm\) 13.63 & 45.42 \(\pm\) 14.08 & 45.25 \(\pm\) 13.49 \\ Serum low-density lipoprotein (mg/dL) & 107.64 \(\pm\) 39.05 & 112.68 \(\pm\) 34.71 & 99.66 \(\pm\) 45.53 \\ Serum triglycerides (mg/dL) & 167.29 \(\pm\) 70.94 & 171.68 \(\pm\) 74.31 & 160.33 \(\pm\) 67.84 \\ Haemoglobin, (g/dL) & 11.66 \(\pm\) 1.47 & 11.98 \(\pm\) 1.51 & 11.15 \(\pm\) 1.32 \\ Serum albumin (g/dL) & 3.90 \(\pm\) 0.41 & 3.94 \(\pm\) 0.41 & 3.83 \(\pm\) 0.43 \\ Serum sodium (mEq/L) & 137.58 \(\pm\) 3.91 & 137.73 \(\pm\) 3.44 & 137.33 \(\pm\) 4.71 \\ Serum potassium (mEq/L) & 4.34 \(\pm\) 0.75 & 4.36 \(\pm\) 0.64 & 4.30 \(\pm\) 0.92 \\ \hline \multicolumn{4}{l}{Data reported as mean \(\pm\) SD. \({}^{\star}\) Significantly higher compared to the other group based on results from independent samples _t_-test. BMI: body mass index.} \\ \end{tabular}
\end{table} 
Table 1: Characteristics of patients undergoing peritoneal dialysis (_N_ = 31). reliability. The remaining elbow-related variables achieved an excellent reliability. Regarding peak torque, the SRD% in the general population ranged between 18.41% in the elbow concentric flexion and 29.44% in the knee concentric extension. Regarding work, the SRD% in the general population ranged between 26.15% in the elbow concentric extension and 33.63% in the knee concentric flexion.