Table 2 Open in new tab Proportion of...

Period 1

Period 2

P-values according to hypotheses

1: All Son.

2: Son. without DL

3: Son. with DL

4: Cardiologist

1 vs. 2 (A)

1 vs. 3 (B)

2 vs. 3 (C)

3 vs. 4 (D)

Rotation

A4C

71.6 (61.7, 81.5)

74.5 (61.7, 87.2)

87.2 (76.6, 95.7)

83.0 (72.3, 93.6)

0.885

0.069^a

0.190^a

0.772^a,b

A2C

56.8 (45.7, 67.9)

85.1 (74.5, 93.6)

83.0 (72.3, 93.6)

0.002

0.002^a

1.000

1.000^a,b

ALAX

36.2 (26.2, 46.2)

42.6 (27.7, 57.4)

70.2 (57.4, 83.0)

87.2 (76.6, 95.7)

0.606

<0.001^a

0.013^a

0.078^b

Tilt

A4C

30.9 (21.0, 40.7)

40.4 (25.5, 55.3)

48.9 (34.0, 63.8)

76.6 (63.8, 87.2)

0.366

0.065^a

0.534^a

0.010

A2C

71.6 (61.7, 81.5)

68.1 (53.2, 80.9)

100.0 (100.0, 100.0)

85.1 (74.5, 93.6)

0.826

<0.001^a

0.018^a,b

ALAX

81.2 (72.5, 88.8)

91.5 (83.0, 97.9)

97.9 (93.6, 100.0)

0.192

0.192^a

1.000

0.358^b

Rotation and tilt

A4C

12.0 (7.9, 16.2)

23.4 (16.3, 30.5)

44.7 (36.9, 53.2)

59.0 (50.4, 67.6)

0.153

<0.001^a

0.050^a

0.239^b

A2C

39.1 (32.9, 45.3)

61.0 (53.2, 68.8)

85.1 (79.4, 90.8)

71.6 (63.8, 78.7)

0.027

<0.001^a

0.016^a

0.182^a,b

ALAX

35.1 (29.3, 41.0)

40.4 (32.6, 48.9)

63.8 (56.0, 71.6)

85.8 (80.1, 91.5)

0.686

0.003^a

0.039^a

0.027

Table 2

Open in new tab

Proportion of standardized acquisitions according to human expert evaluation

	Period 1	Period 2			P-values according to hypotheses
	1: All Son.	2: Son. without DL	3: Son. with DL	4: Cardiologist	1 vs. 2 (A)	1 vs. 3 (B)	2 vs. 3 (C)	3 vs. 4 (D)
Rotation
A4C	71.6 (61.7, 81.5)	74.5 (61.7, 87.2)	87.2 (76.6, 95.7)	83.0 (72.3, 93.6)	0.885	0.069^a	0.190^a	0.772^a,b
A2C	56.8 (45.7, 67.9)	85.1 (74.5, 93.6)	85.1 (74.5, 93.6)	83.0 (72.3, 93.6)	0.002	0.002^a	1.000	1.000^a,b
ALAX	36.2 (26.2, 46.2)	42.6 (27.7, 57.4)	70.2 (57.4, 83.0)	87.2 (76.6, 95.7)	0.606	<0.001^a	0.013^a	0.078^b
Tilt
A4C	30.9 (21.0, 40.7)	40.4 (25.5, 55.3)	48.9 (34.0, 63.8)	76.6 (63.8, 87.2)	0.366	0.065^a	0.534^a	0.010
A2C	71.6 (61.7, 81.5)	68.1 (53.2, 80.9)	100.0 (100.0, 100.0)	85.1 (74.5, 93.6)	0.826	<0.001^a	<0.001^a	0.018^a,b
ALAX	81.2 (72.5, 88.8)	91.5 (83.0, 97.9)	91.5 (83.0, 97.9)	97.9 (93.6, 100.0)	0.192	0.192^a	1.000	0.358^b
Rotation and tilt
A4C	12.0 (7.9, 16.2)	23.4 (16.3, 30.5)	44.7 (36.9, 53.2)	59.0 (50.4, 67.6)	0.153	<0.001^a	0.050^a	0.239^b
A2C	39.1 (32.9, 45.3)	61.0 (53.2, 68.8)	85.1 (79.4, 90.8)	71.6 (63.8, 78.7)	0.027	<0.001^a	0.016^a	0.182^a,b
ALAX	35.1 (29.3, 41.0)	40.4 (32.6, 48.9)	63.8 (56.0, 71.6)	85.8 (80.1, 91.5)	0.686	0.003^a	0.039^a	0.027

	Period 1	Period 2			P-values according to hypotheses
	1: All Son.	2: Son. without DL	3: Son. with DL	4: Cardiologist	1 vs. 2 (A)	1 vs. 3 (B)	2 vs. 3 (C)	3 vs. 4 (D)
Rotation
A4C	71.6 (61.7, 81.5)	74.5 (61.7, 87.2)	87.2 (76.6, 95.7)	83.0 (72.3, 93.6)	0.885	0.069^a	0.190^a	0.772^a,b
A2C	56.8 (45.7, 67.9)	85.1 (74.5, 93.6)	85.1 (74.5, 93.6)	83.0 (72.3, 93.6)	0.002	0.002^a	1.000	1.000^a,b
ALAX	36.2 (26.2, 46.2)	42.6 (27.7, 57.4)	70.2 (57.4, 83.0)	87.2 (76.6, 95.7)	0.606	<0.001^a	0.013^a	0.078^b
Tilt
A4C	30.9 (21.0, 40.7)	40.4 (25.5, 55.3)	48.9 (34.0, 63.8)	76.6 (63.8, 87.2)	0.366	0.065^a	0.534^a	0.010
A2C	71.6 (61.7, 81.5)	68.1 (53.2, 80.9)	100.0 (100.0, 100.0)	85.1 (74.5, 93.6)	0.826	<0.001^a	<0.001^a	0.018^a,b
ALAX	81.2 (72.5, 88.8)	91.5 (83.0, 97.9)	91.5 (83.0, 97.9)	97.9 (93.6, 100.0)	0.192	0.192^a	1.000	0.358^b
Rotation and tilt
A4C	12.0 (7.9, 16.2)	23.4 (16.3, 30.5)	44.7 (36.9, 53.2)	59.0 (50.4, 67.6)	0.153	<0.001^a	0.050^a	0.239^b
A2C	39.1 (32.9, 45.3)	61.0 (53.2, 68.8)	85.1 (79.4, 90.8)	71.6 (63.8, 78.7)	0.027	<0.001^a	0.016^a	0.182^a,b
ALAX	35.1 (29.3, 41.0)	40.4 (32.6, 48.9)	63.8 (56.0, 71.6)	85.8 (80.1, 91.5)	0.686	0.003^a	0.039^a	0.027

A, H₀-A; B, H₀-B; C, H₀-C; D, H₀-D; Son., sonographer.

Data shown as proportion (95% CI) % of correctly standardized views.

^aProportion of standardized views numerically higher when using the scanning assistant (significant and non-significant differences).

^bSonographer recording not significantly less standardized compared with cardiologists.

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