Table 2 Demographics distributions for the corpus under study in terms of images
Images | AllData | Train | Test | Validation | OOB Test |
|---|---|---|---|---|---|
Image Count N (%) | 38,365 (100) | 30,586 (79.72) | 3660 (9.53) | 3832 (9.99) | 286 (0.74) |
Xray view | |||||
 PA (%) | 456 (1.18) | 374 (1.22) | 39 (1.06) | 40 (1.04) | 3 (1.04) |
 AP (%) | 36,596 (95.38) | 29,165 (95.35) | 3491 (95.38) | 3665 (95.61) | 275 (96.15) |
 Unknown (%) | 1313 (3.42) | 1047 (3.42) | 130 (3.55) | 128 (3.33) | 8 (2.79) |
CXR opacity - left | |||||
 None | 12,488 (32.55) | 9983 (32.63) | 1234 (33.71) | 1174 (30.62) | 97 (33.91) |
 Mild | 12,381 (32.27) | 9798 (32.03) | 1189 (32.48) | 1300 (33.91) | 94 (32.86) |
 moderate | 8310 (21.66) | 6625 (21.66) | 760 (20.76) | 862 (22.48) | 63 (22.02) |
 severe | 5185 (13.51) | 4180 (13.66) | 477 (13.03) | 496 (12.94) | 32 (11.18) |
CXR opacity - right | |||||
 None | 12,938 (33.72) | 10,237 (33.46) | 1297 (35.43) | 1311 (34.21) | 93 (32.51) |
 mild | 11,382 (29.66) | 9080 (29.68) | 1051 (28.71) | 1171 (30.55) | 80 (27.97) |
 moderate | 8459 (22.04) | 6771 (22.13) | 792 (21.63) | 821 (21.42) | 75 (26.22) |
 severe | 5585 (14.55) | 4498 (14.70) | 520 (14.20) | 529 (13.80) | 38 (13.28) |