Table 5 Descriptive statistics (Mean ± SD and range) of NIBUT (s) manually measured by the two observers (Obs1 and Obs 2) in the two sessions (N = 85). Paired comparisons between observers for each manual measure (Wilcoxon test in fifth row) and correlation (sixth row), as well as paired comparisons between automatic and each manual measure achieved by the two observers (Wilcoxon test, tenth and eleventh row) and correlation (Spearman Rho; twelfth and thirteenth row) are also reported.
First session (Test) | Second session (Retest) | Overall average manual Mean ± SD (Range) (s) | |||||||
|---|---|---|---|---|---|---|---|---|---|
First manual Mean ± SD (Range) (s) | Second manual Mean ± SD (Range) (s) | Third manual Mean ± SD (Range) (s) | Average Mean ± SD (Range) (s) | First manual Mean ± SD (Range) (s) | Second manual Mean ± SD (Range) (s) | Third manual Mean ± SD (Range) (s) | Average Mean ± SD (Range) (s) | ||
Observer 1 (Obs 1) | 8.2 ± 4.2 (1.9–22.7) | 7.9 ± 3.9 (1.9–20.9) | 7.7 ± 3.7 (1.9–19.0) | 7.9 ± 3.9 (2.0–20.4) | 7.3 ± 3.6 (2.0–19.2) | 6.9 ± 3.5 (1.8–18.3) | 6.8 ± 3.4 (2.2–18.7) | 7.0 ± 3.5 (2.0–18.4) | 7.5 ± 3.6 (2.0–19.0) |
Observer 2 (Obs 2) | 7.2 ± 3.7 (1.2–19.7) | 6.5 ± 3.6 (1.5–18.6) | 6.3 ± 3.4 (1.6–17.5) | 6.7 ± 3.5 (1.7–17.7) | 6.2 ± 3.6 (1.4–19.3) | 5.8 ± 3.4 (1.0–17.1) | 5.8 ± 3.3 (1.2–18.2) | 6.0 ± 3.4 (1.2–17.4) | 6.3 ± 3.4 (1.7–17.3) |
Comparison Obs 1—Obs 2 (Wicoxon test) | *p < 0.001 | *p < 0.001 | *p < 0.001 | *p < 0.001 | *p < 0.001 | *p < 0.001 | *p < 0.001 | *p < 0.001 | *p < 0.001 |
Correlation Obs1—Obs 2 (Sperman Rho) | *0.86 (p < 0.001) | *0.85 (p < 0.001) | *0.87 (p < 0.001) | *0.89 (p < 0.001) | *0.88 (p < 0.001) | *0.90 (p < 0.001) | *0.93 (p < 0.001) | *0.92 (p < 0.001) | *0.94 (p < 0.001) |
Difference between Automatic and Manual NIBUT Obs 1 (s) | − 1.6 | − 1.3 | − 1.2 | − 1.4 | − 0.8 | − 0.3 | − 0.3 | − 0.5 | − 0.9 |
Difference between Automatic and Manual NIBUT Obs 2 (s) | − 0.6 | 0.1 | 0.3 | -0.1 | 0.4 | 0.7 | 0.7 | 0.6 | 0.3 |
Comparison Automatic-Obs 1 (Wicoxon test) | *p < 0.001 | *p < 0.001 | *p < 0.001 | *p < 0.001 | *p < 0.001 | p = 0.03 | p = 0.04 | *p < 0.001 | *p < 0.001 |
Comparison Automatic-Obs 2 (Wicoxon test) | *p = 0.003 | p = 0.94 | p = 0.27 | p = 0.40 | p = 0.07 | *p < 0.001 | *p < 0.001 | *p < 0.001 | p = 0.33 |
Correlation Automatic—Obs 1 (Sperman Rho) | *0.87 (p < 0.001) | *0.88 (p < 0.001) | *0.88 (p < 0.001) | *0.89 (p < 0.001) | *0.84 (p < 0.001) | *0.86 (p < 0.001) | *0.87 (p < 0.001) | *0.87 (p < 0.001) | *0.89 (p < 0.001) |
Correlation Automatic—Obs 2 (Sperman Rho) | *0.84 (p < 0.001) | *0.84 (p < 0.001) | *0.85 (p < 0.001) | *0.86 (p < 0.001) | *0.83 (p < 0.001) | *0.87 (p < 0.001) | *0.88 (p < 0.001) | *0.87 (p < 0.001) | *0.89 (p < 0.001) |
