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. 2008 Sep 2;5:20. doi: 10.1186/1743-0003-5-20

Table 3.

Agreement and difference between estimates and measure of active time.

Inside 20% Critical Margin of Agreement (N) Differences between methods (%)
Activities Total M3 M1 M3 M1 P-Value
Gait 81 55 (67.9%) 42 (51.9%) -1.4 ± 32.7 -17.6 ± 50.7 <0.001
Balance 50 23 (46.0%) 19 (38.0%) -18.9 ± 69.1 -18.9 ± 64.9 ≤0.993
Reinforcement 40 18 (45.0%) 8 (20.0%) -7.2 ± 83.1 -42.9 ± 101.6 <0.001
Weight bear. 39 19 (48.7%) 17 (43.6%) -7.9 ± 65.2 -30.0 ± 83.5 ≤0.003
Stairs 32 17 (53.1%) 9 (28.1%) 30.6 ± 59.3 18.8 ± 71.1 ≤0.028
Prosthesis 25 13 (52.0%) 13 (52.0%) 23.5 ± 57.7 22.2 ± 62.0 ≤0.633
Antalgic therapy 9 0 (0.0%) 0 (0.0%) 91.1 ± 104.2 94.1 ± 105.9 ≤0.052
Walking, out. 6 3 (50.0%) 4 (66.7%) 33.0 ± 83.8 26.15 ± 91.8 ≤0.511
Others 13 2 (15.4%) 1 (7.7%) 10.5 ± 94.5 16.5 ± 92.2 ≤0.101

On the left side of the table, data reports the number of activities that were inside the ± 20% Critical Margin of agreement in the Bland-Altman Plots. On the right side, difference between measure (TM) and estimate (M) of active time are presented according to this formula: [(M-TM)/((TM+M)/2)*100]. Paired Sample T Test were used to evaluate the differences of agreement of both M3 and M1 with TM. Values are presented as mean ± SD.