Table 4.
Transducer Reproducibility 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) | |||||||
|---|---|---|---|---|---|---|---|---|
|
| ||||||||
| Participant Group | # Images Averaged | Mean | Range | Between-participant SD (95% CI) | QIBA-reproducibility SD (95% CI) | Gauge-reproducibility SD | Between-trial Repeatability SD (95% CI) | RDC (95% CI) |
| A | 1 3 |
0.95 | [0.66, 1.23] | 0.11 (0.07, 0.16) | 0.08 (0.07, 0.62) | 0.03 | 0.08 (0.06, 0.10) | 0.23 (0.20, 1.70) |
| 0.96 | [0.67, 1.21] | 0.10 (0.07, 0.16) | 0.07 (0.06, 0.55) | 0.05 | 0.06 (0.05, 0.07) | 0.21 (0.17, 1.52) | ||
|
| ||||||||
| B | 1 3 |
0.93 | [0.56, 1.25] | 0.13 (0.09, 0.19) | 0.07 (0.06, 0.08) | 0 | 0.07 (0.06, 0.09) | 0.18 (0.16, 0.23) |
| 0.93 | [0.56, 1.24] | 0.13 (0.09, 0.18) | 0.06 (0.05, 0.09) | 0 | 0.06 (0.05, 0.07) | 0.16 (0.14, 0.26) | ||
|
| ||||||||
| Conditions | Summary Statistics for BSC (Unit: dB) | |||||||
|
| ||||||||
| Participant Group | # Images Averaged | Mean | Range | Between-participant SD (95% CI) | QIBA-reproducibility SD (95% CI) | Gauge-reproducibility SD | Between-trial Repeatability SD (95% CI) | RDC (95% CI) |
|
| ||||||||
| A | 1 3 |
−27.36 | [−39.23, −14.63] | 3.56 (2.50, 5.39) | 2.91 (2.51, 36.6) | 1.09 | 2.69 (2.21, 3.45) | 8.05 (6.94, 101) |
| −27.50 | [−37.75, −17.89] | 3.46 (2.42, 5.26) | 2.56 (2.18, 30.2) | 1.51 | 2.07 (1.70, 2.64) | 7.09 (6.04, 84.7) | ||
|
| ||||||||
| B | 1 3 |
−26.39 | [−38.54, −15.91] | 4.63 (3.45, 6.81) | 2.90 (2.49, 41.9) | 0.78 | 2.79 (2.30, 3.55) | 8.02 (6.90, 116) |
| −26.48 | [−39.88, −15.14] | 4.58 (3.42, 6.70) | 2.68 (2.30, 39.4) | 0.63 | 2.60 (2.15, 3.31) | 7.42 (6.38, 109) | ||