Table 2.
Imaging-Related Characteristics of Study Subjects Presented on or Before t0, Extracted by Natural Language Processing (NLP; n = 46,041)
| Patient characters related to image | n (%) |
|---|---|
| Imaging features (mutually inclusive) at or before index scan: | |
| Atrophy | 14,343 (31.2) |
| Calcification | 12,637 (27.4) |
| Cyst | 14,661 (31.8) |
| Duct dilatation | 10,413 (22.6) |
| Pseudocyst | 4435 (9.6) |
| Imaging features (mutually exclusive) at or before index scan: | |
| Single | |
| Calcification only | 9437 (20.5) |
| Duct dilatation only | 6667 (14.5) |
| Atrophy only | 11,026 (23.9) |
| Cyst only | 9269 (20.1) |
| Pseudocyst only | 1636 (3.6) |
| Two or more | |
| Calcification + duct dilatation (w/ or wo/ atrophy, cyst, pseudocyst) | 1197 (2.6) |
| Calcification + any 1 or more of (atrophy, cyst, pseudocyst) | 2003 (4.4) |
| Duct dilatation + any 1 or more of (atrophy, cyst, pseudocyst) | 2549 (5.5) |
| Any 2 or more of (atrophy, cyst, pseudocyst) | 2257 (4.9) |
| Type of service at index scan | |
| Outpatient/ED | 35,802 (77.8) |
| Inpatient | 10,239 (22.2) |
| Index scan modality | |
| CT | 39,288 (85.3) |
| MRI | 6753 (14.7) |
| Indication for the index scan (mutually inclusive) | |
| Abdominal pain | 11,622 (25.2) |
| Other pain | 5037 (10.9) |
| GI problem | 6022 (13.1) |
| Concern raised by laboratory test results | 4568 (9.9) |
| Follow-up | 3661 (8.0) |
| Urinary problem | 2323 (5.1) |
| Consultation | 2055 (4.5) |
| Shortness of breath | 950 (2.1) |
| Weakness | 930 (2.0) |
| Fever | 749 (1.6) |
| Nonpancreatic cancer | 453 (1.0) |
| Others | 9496 (20.6) |
| Unknown | 9108 (19.8) |