Table 3 Subgroup analysis
From: Blinded, randomized trial of sonographer versus AI cardiac function assessment
Subgroup | AI (n) | AI (MAD) | Sonographer (n) | Sonographer (MAD) | Difference (95% confidence interval) |
|---|---|---|---|---|---|
Method of LVEF evaluation | |||||
Single plane | 1,107 | 3.20 ± 6.41 | 1,142 | 4.38 ± 5.75 | −1.19 (−1.69 to −0.68) |
Biplane | 633 | 2.09 ± 3.37 | 613 | 2.61 ± 3.77 | −0.52 (−0.92 to −0.11) |
Race | |||||
White | 1,032 | 2.58 ± 5.36 | 1,009 | 3.71 ± 5.18 | −1.13 (−1.57 to −0.66) |
Black | 230 | 3.91 ± 7.59 | 249 | 4.00 ± 5.27 | −0.08 (−1.22 to 1.14) |
Hispanic | 203 | 2.44 ± 4.26 | 202 | 3.39 ± 4.57 | −0.95 (−1.82 to −0.09) |
Asian | 123 | 3.11 ± 5.44 | 150 | 4.29 ± 6.04 | −1.18 (−2.55 to −0.23) |
Other | 152 | 2.77 ± 4.11 | 145 | 3.74 ± 5.26 | −0.97 (−2.07 to −0.08) |
Sex | |||||
Male | 982 | 2.75 ± 5.92 | 1,001 | 3.67 ± 5.18 | −0.92 (−1.40 to −0.42) |
Female | 758 | 2.85 ± 4.97 | 754 | 3.89 ± 5.26 | −1.04 (−1.56 to −0.52) |
Image quality | |||||
Poor | 314 | 4.22 ± 7.12 | 334 | 4.27 ± 5.92 | −0.05 (−1.04 to 0.97) |
Adequate | 875 | 2.45 ± 5.36 | 850 | 3.53 ± 5.01 | −1.08 (−1.56 to −0.58) |
Good | 114 | 2.01 ± 3.15 | 122 | 3.51 ± 5.11 | −1.51 (−2.62 to −0.45) |
Not specified | 437 | 2.66 ± 4.82 | 449 | 3.90 ± 5.02 | −1.24 (−1.89 to −0.58) |
Location | |||||
Inpatient | 1,033 | 3.09 ± 5.59 | 1,034 | 4.01 ± 5.49 | −0.92 (−1.40 to −0.45) |
Outpatient | 707 | 2.36 ± 5.41 | 721 | 3.42 ± 4.78 | −1.05 (−1.57 to −0.51) |
Cardiologist prediction of group | |||||
AI | 557 | 3.64 ± 6.42 | 418 | 3.82 ± 5.09 | −0.18 (−0.91 to 0.54) |
Sonographer | 427 | 3.38 ± 4.95 | 573 | 4.00 ± 4.62 | −0.62 (−1.21 to 0) |
Uncertain | 756 | 1.85 ± 4.95 | 764 | 3.56 ± 5.68 | −1.72 (−2.26 to −1.17) |
Correct prediction | 557 | 3.64 ± 6.42 | 573 | 4.00 ± 4.62 | −0.36 (−0.98 to 0.31) |
Incorrect prediction | 427 | 3.38 ± 4.95 | 418 | 3.82 ± 5.09 | −0.44 (11.12 to 0.22) |
