Table 4.
Subgroup analysis of the LLFs in danger zone nodule
| DLD system | p-value | Thoracic radiologists | p-value | Non-thoracic radiologists | p-value | Radiology residents | p-value | |
|---|---|---|---|---|---|---|---|---|
| Location | ||||||||
| Apical lung zone | 87.9 (29/33) | 0.002* | 84.9 (56/66) | 0.319 | 69.7 (46/66) | 0.032* | 65.9 (87/132) | 0.120 |
| Paramediastinal | 52.5 (31/59) | 78.8 (93/118) | 53.4 (63/118) | 57.6 (136/236) | ||||
| Retrodiaphragmatic | 58.8 (10/17) | 85.3 (29/34) | 41.2 (14/34) | 35.3 (24/68) | ||||
| Visibility score | ||||||||
| 1 | 16.7 (1/6) | 0.169 | 33.3 (4/12) | 0.129 | 16.7 (2/12) | 0.271 | 20.8 (5/24) | 0.066 |
| 2 | 50.0 (12/24) | 58.3 (28/48) | 33.3 (16/48) | 41.7 (40/96) | ||||
| 3 | 64.4 (38/59) | 90.7 (107/118) | 60.2 (71/118) | 58.5 (138/236) | ||||
| 4 | 95.0 (19/20) | 97.5 (39/40) | 85.0 (34/40) | 80.0 (64/80) | ||||
| Size | ||||||||
| ≤ 2 cm | 48.5 (33/68) | < 0.001* | 74.3 (101/136) | < 0.001* | 47.1 (64/136) | < 0.001* | 47.8 (130/272) | < 0.001* |
| > 2 cm | 90.2 (37/41) | 93.9 (77/82) | 71.9 (59/82) | 71.3 (117/164) | ||||
DLD Deep learning-based nodule detection, LLF Lesion localization fraction
*p < 0.05 was regarded as statistically significant. Denominator for the LLF calculation corresponds to the total number of true lesions multiplied by the number of readers in the respective group