Table 3.
Between-trial Repeatability Estimates for Single- and Three-image AC and BSC Measures Obtained under Various Conditions, Calculated Using the Two-way Random Effects Model.
| Conditions | Summary Statistics for AC (Unit: dB/cm-MHz) | ICC Estimates for AC | |||||||
|---|---|---|---|---|---|---|---|---|---|
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| Participant Group | Transducer | # Images Averaged | Mean | Range | Between-participant SD (95% CI) | Between-trial Repeatability SD (95% CI) | RC (95% CI) | ICC(1, 1) (95% CI) | ICC(1, 2) (95% CI) |
| A | 4C1 | 1 | 0.94 | [0.66, 1.18] | 0.12 (0.07, 0.19) | 0.08 (0.06, 0.12) | 0.23 (0.18, 0.34) | 0.67 (0.34, 0.85) | 0.80 (0.50, 0.92) |
| 3 | 0.94 | [0.67, 1.16] | 0.12 (0.08, 0.19) | 0.06 (0.05, 0.09) | 0.16 (0.13, 0.24) | 0.81 (0.59, 0.92) | 0.90 (0.74, 0.96) | ||
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| A | 6C1HD | 1 | 0.97 | [0.73, 1.23] | 0.10 (0.06, 0.16) | 0.07 (0.05, 0.09) | 0.18 (0.14, 0.26) | 0.71 (0.40, 0.87) | 0.83 (0.57, 0.93) |
| 3 | 0.97 | [0.73, 1.21] | 0.11 (0.07, 0.16) | 0.05 (0.04, 0.08) | 0.15 (0.11, 0.21) | 0.80 (0.56, 0.91) | 0.89 (0.72, 0.95) | ||
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| B | 4C1 | 1 | 0.93 | [0.69, 1.25] | 0.12 (0.08, 0.18) | 0.05 (0.04, 0.08) | 0.15 (0.12, 0.22) | 0.83 (0.63, 0.93) | 0.91 (0.78, 0.96) |
| 3 | 0.93 | [0.69, 1.24] | 0.12 (0.08, 0.17) | 0.05 (0.04, 0.07) | 0.14 (0.11, 0.20) | 0.84 (0.66, 0.93) | 0.91 (0.79, 0.96) | ||
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| B | 6C1HD | 1 | 0.93 | [0.56, 1.20] | 0.13 (0.09, 0.20) | 0.08 (0.06, 0.11) | 0.21 (0.17, 0.31) | 0.74 (0.48, 0.89) | 0.85 (0.64, 0.94) |
| 3 | 0.93 | [0.56, 1.21] | 0.13 (0.09, 0.20) | 0.07 (0.05, 0.09) | 0.18 (0.14, 0.26) | 0.81 (0.59, 0.92) | 0.89 (0.74, 0.96) | ||
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| Conditions | Summary Statistics for logBSC (Unit: dB) | ICC Estimates for logBSC | |||||||
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| Participant Group | Transducer | # Images Averaged | Mean | Range | Between-participant SD (95% CI) | Between-trial Repeatability SD (95% CI) | RC (95% CI) | ICC(1, 1) (95% CI) | ICC(1, 2) (95% CI) |
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| A | 4C1 | 1 | −28.17 | [−39.23, −20.65] | 3.64 (1.87, 5.88) | 3.12 (2.39, 4.51) | 8.65 (6.62, 12.50) | 0.58 (0.20, 0.81) | 0.73 (0.33, 0.89) |
| 3 | −28.17 | [−37.75, −20.76] | 3.85 (2.52, 5.90) | 2.26 (1.73, 3.27) | 6.27 (4.79, 9.05) | 0.74 (0.46, 0.89) | 0.85 (0.63, 0.94) | ||
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| A | 6C1HD | 1 | −26.55 | [−34.26, −14.63] | 3.49 (2.24, 5.39) | 2.18 (1.67, 3.15) | 6.04 (4.62, 8.72) | 0.72 (0.42, 0.88) | 0.84 (0.59, 0.93) |
| 3 | −26.83 | [−34.40, −17.89] | 3.50 (2.37, 5.33) | 1.85 (1.42, 2.67) | 5.13 (3.92, 7.41) | 0.78 (0.53, 0.91) | 0.88 (0.70, 0.95) | ||
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| B | 4C1 | 1 | −27.31 | [−38.54, −16.82] | 4.64 (3.25, 6.93) | 2.23 (1.72, 3.19) | 6.19 (4.76, 8.84) | 0.81 (0.60, 0.92) | 0.90 (0.75, 0.96) |
| 3 | −27.35 | [−39.88, −17.51] | 4.47 (3.14, 6.66) | 2.10 (1.61, 3.00) | 5.81 (4.47, 8.31) | 0.82 (0.61, 0.92) | 0.90 (0.76, 0.96) | ||
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| B | 6C1HD | 1 | −25.46 | [−36.95, −15.91] | 4.41 (2.64, 6.85) | 3.25 (2.50, 4.65) | 9.01 (6.93, 12.87) | 0.65 (0.32, 0.84) | 0.79 (0.48, 0.91) |
| 3 | −25.61 | [−37.20, −15.14] | 4.46 (2.80, 6.87) | 3.03 (2.33, 4.32) | 8.38 (6.45, 11.98) | 0.69 (0.38, 0.86) | 0.81 (0.55, 0.92) | ||