# Intermonitor Variability of Garmin Vivofit(r) Jr. Wristband
## 3 Results
In the step measurement, the graphs showed the narrowest limits for Wristband 4 vs. Wristband 4 vs. Wristband 5 (26.02 steps). Figures 3 and 4 show the Bland-Altman plots indicating the differences between the wristbands concerning PA minutes and the limits of agreement. Figures 3 and 4 show the differences between the wristbands and the limits of agreement of the wristbands concerning the minutes of PA. Systematic differences (mean differences) and the interval between the upper and lower limits of agreement are essential for determining the validity of the wristbands. The larger the interval between the upper and lower limits, the less accurate the measurements become. All wristbands showed wide limits of agreement. In the measurement of minutes of PA, the graphs showed the narrowest limits for Wristband 4 vs. Wristband 5 (0.27 min) and the widest limits for Wristband 1 vs. Wristband 3 (0.8 min). Table 4 shows the Blan-Altman values with the upper and lower bias limits of agreement and 95% CI with upper and lower limits between wristbands concerning steps and minutes of MVPA. \begin{table}
\begin{tabular}{c c c c c} \hline  & \multicolumn{2}{c}{**Steps**} & \multicolumn{2}{c}{**Minutes in MVPA**} \\  & **ICC (95\%CI)** & \(p\) & **ICC (95\%CI)** & \(p\) \\ \hline Wristband 1 vs. Wristband 2 & 0.994 a (0.965–0.998) & \textless{}0.001 & 0.920 a (0.985–0.998) & \textless{}0.001 \\ Wristband 1 vs. Wristband 3 & 0.997 a (0.994–0.999) & \textless{}0.001 & 0.892 b (0.786–0.947) & \textless{}0.001 \\ Wristband 2 vs. Wristband 3 & 0.991 a (0.944–0.997) & \textless{}0.001 & 0.920 a (0.811–0.964) & \textless{}0.001 \\ Wristband 4 vs. Wristband 5 & 0.998 a (0.995–0.999) & \textless{}0.001 & 0.990 a (0.975–0.996) & \textless{}0.001 \\ Wristband 4 vs. Wristband 6 & 0.991 a (0.955–0.997) & \textless{}0.001 & 0.968 a (0.934–0.985) & \textless{}0.001 \\ Wristband 5 vs. Wristband 6 & 0.994 a (0.983–0.998) & \textless{}0.001 & 0.977 a (0.952–0.989) & \textless{}0.001 \\ \hline \end{tabular}  
* Excellent b Good.  
\end{table} 
Table 3: Intraclass Correlation Coefficient (Corresponding 95% Confidence Interval). Figure 1: [PERSON] plots of differences between right wristbands on steps. Straight line: Bias; dotted line: 95% LoA. Black dots highlight overlapping points. Figure 2: [PERSON] plots of differences between left wristbands on steps. Straight line: Bias; dotted line: 95% LoA. Black dots highlight overlapping points. Figure 3: [PERSON] plots of differences between right wristbands on minutes in MVPA. Straight line: Bias; dotted line: 95% LoA. Black dots highlight overlapping points. \begin{table}
\begin{tabular}{l c c c c c c c c c c c} \hline \hline  & \multicolumn{6}{c}{**LOA**} & \multicolumn{6}{c}{**95\% CI**} \\ \hline  & \multicolumn{3}{c}{**Steps**} & \multicolumn{3}{c}{**Minutes in MVPA**} & \multicolumn{3}{c}{**Steps**} & \multicolumn{3}{c}{**Minutes in MVPA**} \\ \hline  & **Bias** & **Lower** & **Upper** & **Bias** & **Lower** & **Upper** & **Lower** & **Upper** & **Lower** & **Upper** \\ \hline Wristband 1 vs. Wristband 2 & \(-4.30\) & \(-14.39\) & \(5.79\) & \(-0.03\) & \(-0.42\) & \(0.35\) & \(-6.22\) & \(-2.38\) & \(-0.11\) & \(0.04\) \\ Wristband 1 vs. Wristband 3 & \(0.90\) & \(-8.42\) & \(10.22\) & \(0.07\) & \(-0.038\) & \(0.52\) & \(-0.88\) & \(2.68\) & \(-0.02\) & \(0.15\) \\ Wristband 2 vs. Wristband 3 & \(5.20\) & \(-6.18\) & \(16.58\) & \(0.10\) & \(-0.30\) & \(0.50\) & \(3.03\) & \(7.37\) & \(0.02\) & \(0.18\) \\ Wristband 4 vs. Wristband 5 & \(-1.90\) & \(-7.83\) & \(4.03\) & \(0.03\) & \(-0.10\) & \(0.17\) & \(-3.03\) & \(-0.77\) & \(0.01\) & \(0.06\) \\ Wristband 4 vs. Wristband 6 & \(-5.17\) & \(-18.18\) & \(7.84\) & \(0.03\) & \(-0.22\) & \(0.28\) & \(-7.65\) & \(-2.69\) & \(-0.01\) & \(0.08\) \\ Wristband 5 vs. Wristband 6 & \(-3.27\) & \(-14.30\) & \(7.77\) & \(0.00\) & \(-0.21\) & \(0.21\) & \(-5.37\) & \(-1.16\) & \(-0.04\) & \(0.04\) \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Blan-Altman 95% Limits of Agreement (LOA) and Bland-Altman 95% Confidence Interval (CI).