Table 1.
Ultrasound data characteristics between all data sources. The characteristics of the original, locally sourced holdout set from our previous work are also provided for comparison.
| Local Data | External Data | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| D462 | D117 | D62 | Dall | ||||||||
| Sliding | Absent | Sliding | Absent | Sliding | Absent | Sliding | Absent | Sliding | Absent | ||
| Patients | By source | 122 | 163 | 53 | 22 | 238 | |||||
| By class | 88 | 36 | 154 | 36 | 48 | 6 | 21 | 7 | 223 | 49 | |
| Sex | Male |
46
(37%) |
25
(20%) |
75 (39%) |
22 (12%) |
25 (46%) |
5 (9%) |
9 (32%) |
3 (11%) |
109
(40%) |
30
(11%) |
| Female |
42
(34%) |
11
(9%) |
47 (25%) |
12 (6%) |
23 (43%) |
1 (2%) |
9 (32%) |
2 (7%) |
79
(29%) |
15
(5%) |
|
| Unavailable |
0
(0%) |
0
(0%) |
32 (17%) |
2 (1%) |
0 (0%) |
0 (0%) |
3 (10%) |
2 (7%) |
35
(13%) |
4
(1%) |
|
| Age | Mean (std) |
60.0
(17.3%) |
64.9
(13.9%) |
56.4 (16.4%) |
58.5 (13.1%) |
55.9 (22.0%) |
43.3 (20.8%) |
56.8 (16.7%) |
50.5 (19.1%) |
56.3
(18.0%) |
55.5
(16.1%) |
| Unavailable |
0
(0%) |
0
(0%) |
32 (17%) |
2 (1%) |
0 (0%) |
0 (0%) |
2 (7%) |
2 (7%) |
34
(12%) |
4
(1%) |
|
| Clips | By source | 540 | 462 | 117 | 62 | 641 | |||||
| By class |
402
(74%) |
138
(26%) |
404 (88%) |
58 (12%) |
107 (91%) |
10 (9%) |
46 (74%) |
16 (26%) |
557
(87%) |
84
(13%) |
|
| Machine Vendors |
Phillips |
0
(0%) |
2
(0%) |
0 (0%) |
0 (0%) |
0 (0%) |
0 (0%) |
24 (39%) |
9 (15%) |
24
(4%) |
9
(1%) |
| Sonosite |
395
(73%) |
96
(18%) |
398 (86%) |
58 (13%) |
0 (0%) |
0 (0%) |
13 (21%) |
0 (0%) |
411
(64%) |
58
(9%) |
|
| Mindray |
7
(1%) |
40
(7%) |
0 (0%) |
0 (0%) |
107 (91%) |
10 (9%) |
6 (10%) |
5 (8%) |
113
(18%) |
16
(2%) |
|
| Unavailable |
0
(0%) |
0
(0%) |
6 (1%) |
0 (0%) |
0 (0%) |
0 (0%) |
3 (5%) |
2 (3%) |
9
(1%) |
2
(0%) |
|
| Probe | Phased Array |
366
(68%) |
118
(22%) |
337 (73%) |
52 (11%) |
65 (56%) |
3 (3%) |
20 (32%) |
1 (2%) |
422
(66%) |
56
(9%) |
| Curved Linear |
32
(6%) |
14
(3%) |
67 (15%) |
6 (1%) |
42 (36%) |
7 (6%) |
26 (42%) |
15 (24%) |
135
(21%) |
28
(4%) |
|
| Location | ED |
122
(23%) |
12
(2%) |
0 (0%) |
0 (0%) |
107 (91%) |
10 (9%) |
24 (39%) |
13 (21%) |
131
(20%) |
23
(4%) |
| ICU |
274
(51%) |
124
(23%) |
401 (87%) |
58 (13%) |
0 (0%) |
0 (0%) |
19 (31%) |
1 (2%) |
420
(65%) |
59
(9%) |
|
| Unavailable |
0
(0%) |
0
(0%) |
3 (1%) |
0 (0%) |
0 (0%) |
0 (0%) |
3 (5%) |
2 (3%) |
6
(1%) |
2
(0%) |
|
| Imaging Preset |
Abdominal |
373
(69%) |
104
(19%) |
194 (42%) |
21 (5%) |
45 (38%) |
4 (3%) |
20 (32%) |
13 (21%) |
259
(41%) |
38
(6%) |
| Cardiac |
14
(3%) |
4
(1%) |
23 (5%) |
0 (0%) |
20 (17%) |
2 (2%) |
4 (6%) |
0 (0%) |
47
(7%) |
2
(0%) |
|
| Lung |
11
(2%) |
24
(4%) |
178 (39%) |
37 (8%) |
42 (36%) |
4 (3%) |
16 (26%) |
1 (2%) |
236
(37%) |
42
(7%) |
|
| Unavailable |
0
(0%) |
0
(0%) |
9 (2%) |
0 (0%) |
0 (0%) |
0 (0%) |
6 (9%) |
2 (3%) |
15
(2%) |
2
(0%) |
|
| Depth | <6 cm |
14
(3%) |
8
(1%) |
4 (1%) |
0 (0%) |
2 (2%) |
0 (0%) |
4 (6%) |
0 (0%) |
10
(2%) |
0
(0%) |
| 6–20 cm |
382
(71%) |
130
(24%) |
395 (85%) |
58 (13%) |
104 (89%) |
10 (9%) |
40 (65%) |
16 (26%) |
539
(84%) |
84
(13%) |
|
| >20 cm |
6
(1%) |
0
(0%) |
5 (1%) |
0 (0%) |
1 (1%) |
0 (0%) |
2 (3%) |
0 (0%) |
8
(1%) |
0
(0%) |
|