Table 1.
Total number of chest radiographs in AI-unaided and AI-aided conditions.
| Variable | Overall (n = 18680) | AI-unaided (n = 9571) | AI-aided (n = 9109) | p-value |
|---|---|---|---|---|
| Sex | 0.256 | |||
| Female | 9240 (49.5) | 4695 (49.1) | 4545 (49.9) | |
| Male | 9440 (50.5) | 4876 (50.9) | 4564 (50.1) | |
| Age (year)* | 58.52 (19.11) | 59.15 (19.20) | 57.85 (18.99) | <0.001 |
| Clinics | <0.001 | |||
| Inpatient | 9658 (51.7) | 5250 (54.9) | 4408 (48.4) | |
| Outpatient | 9022 (48.3) | 4321 (45.1) | 4701 (51.6) | |
| Patient location | <0.001 | |||
| Outpatient clinic | 9022 (48.3) | 4321 (45.1) | 4701 (51.6) | |
| ER | 2603 (13.9) | 1373 (14.3) | 1230 (13.5) | |
| General ward | 5673 (30.4) | 3042 (31.8) | 2631 (28.9) | |
| ICU | 1382 (7.4) | 835 (8.7) | 547 (6.0) | |
| Presence of previous comparable CXRs | 0.001 | |||
| Absent | 6940 (37.2) | 3444 (36.0) | 3496 (38.4) | |
| Present | 11740 (62.8) | 6127 (64.0) | 5613 (61.6) | |
| Atelectasis | <0.001 | |||
| Absent | 16,722 (89.5) | 8472 (88.5) | 8250 (90.6) | |
| Present | 1958 (10.5) | 1099 (11.5) | 859 (9.4) | |
| Cardiomegaly | <0.001 | |||
| Absent | 16,493 (88.3) | 8364 (87.4) | 8129 (89.2) | |
| Present | 2187 (11.7) | 1207 (12.6) | 980 (10.8) | |
| Consolidation | <0.001 | |||
| Absent | 13,259 (71.0) | 6513 (68.0) | 6746 (74.1) | |
| Present | 5421 (29.0) | 3058 (32.0) | 2363 (25.9) | |
| Fibrosis | <0.001 | |||
| Absent | 15,866 (84.9) | 7979 (83.4) | 7887 (86.6) | |
| Present | 2814 (15.1) | 1592 (16.6) | 1222 (13.4) | |
| Nodule | <0.001 | |||
| Absent | 16,066 (86.0) | 8088 (84.5) | 7978 (87.6) | |
| Present | 2614 (14.0) | 1483 (15.5) | 1131 (12.4) | |
| Pleural effusion | <0.001 | |||
| Absent | 15651 (83.8) | 7876 (82.3) | 7775 (85.4) | |
| Present | 3029 (16.2) | 1695 (17.7) | 1334 (14.6) | |
| Pneumoperitoneum | 0.637 | |||
| Absent | 18,494 (99.0) | 9472 (99.0) | 9022 (99.0) | |
| Present | 186 (1.0) | 99 (1.0) | 87 (1.0) | |
| Pneumothorax | <0.001 | |||
| Absent | 18,086 (96.8) | 9208 (96.2) | 8878 (97.5) | |
| Present | 594 (3.2) | 363 (3.8) | 231 (2.5) | |
| Total abnormality scores | <0.001 | |||
| Low (<15%) | 11,007 (58.9) | 5308 (55.5) | 5699 (62.6) | |
| High (≥15%) | 7673 (41.1) | 4263 (44.5) | 3410 (37.4) |
Note. Values are presented as the total number of CXRs and a percentage in parentheses.
*Value represents a mean and standard deviation in parenthesis.
AI artificial intelligence, CXR chest radiograph, ER emergency room, ICU intensive care unit.