Table 6 Agreement and association between gold standard and PET/CT scan readers
From: 18F-FDG PET/CT in therapy response assessment: oligometastatic colorectal cancer
Result | Gold standard | X2 | P | Kappa | ||||
|---|---|---|---|---|---|---|---|---|
+ ve | − ve | Total No | ||||||
Primary site | Read. 1 | + ve | 34 (100%) | 1 (2.2%) | 35 (44.3%) | |||
− ve | 0 (0.0%) | 44 (97.8%) | 44 (55.7%) | 67.32 | 0.00** | 0.92 | ||
Read. 2 | + ve | 33 (97.1%) | 1 (2.2%) | 34 (43%) | ||||
− ve | 1 (2.9%) | 44 (97.8%) | 45 (57%) | 71.29 | 0.00** | 0.94 | ||
LNs mets | Read. 1 | + ve | 43 (79.6%) | 4 (16%) | 47 (59.5%) | |||
− ve | 11 (20.4%) | 21 (84%) | 32 (40.5%) | 38.95 | 0.00** | 0.701 | ||
Read. 2 | + ve | 40 (74.1%) | 5 (20%) | 45 (57%) | ||||
− ve | 14 (25.9%) | 20 (80%) | 34 (43%) | 34.13 | 0.00** | 0.65 | ||
Liver mets | Read. 1 | + ve | 46 (93.9%) | 5 (16.7%) | 51 (64.6%) | |||
− ve | 3 (6.1%) | 25 (82.3%) | 28 (35.4%) | 59.35 | 0.00** | 0.86 | ||
Read. 2 | + ve | 44 (90.0%) | 4 (13.3%) | 48 (60.8%) | ||||
− ve | 5 (10%) | 26 (86.7%) | 31 (39.2%) | 62.93 | 0.00** | 0.89 | ||
Peritonial mets | Read. 1 | + ve | 23 (82.1%) | 1 (1.9%) | 24 (30.4%) | |||
− ve | 5 (17.9%) | 50 (98.1%) | 55 (69.6%) | 58.55 | 0.00** | 0.86 | ||
Read. 2 | + ve | 24 (85.7%) | 3 (5.9%) | 27 (34.2%) | ||||
− ve | 4 (14.3%) | 48 (94.1%) | 52 (65.8%) | 66.38 | 0.00** | 0.91 | ||
Lung mets | Read. 1 | + ve | 22 (78.6%) | 3 (5.9%) | 25 (31.6%) | |||
− ve | 6 (21.4%) | 48 (94.1%) | 54 (68.4%) | 41.34 | 0.00** | 0.72 | ||
Read. 2 | + ve | 24 (85.7%) | 4 (7.8%) | 28 (35.4%) | ||||
− ve | 4 (24.3%) | 47 (92.2%) | 51 (64.6%) | 42.82 | 0.00** | 0.73 | ||
Bone mets | Read. 1 | + ve | 12 (85.7%) | 1 (1.5%) | 13 (16.5%) | |||
-ve | 2 (14.3%) | 64 (98.5%) | 66 (83.5%) | 72.24 | 0.00** | 0.95 | ||
Read. 2 | + ve | 13 (92.9%) | 2 (3.1%) | 15 (18.9%) | ||||
− ve | 1 (7.1%) | 63 (96.9%) | 64 (81.1%) | 59.36 | 0.00** | 0.86 | ||
Spleen mets | Read. 1 | + ve | 2 (100%) | 0 (0.0%) | 2 (2.5%) | |||
− ve | 0 (0.0%) | 77 (100%) | 77 (97.5%) | 79.0 | 0.00** | 1.0 | ||
Read. 2 | + ve | 2 (100%) | 0 (0.0%) | 2 (2.5%) | ||||
− ve | 0 (0.0%) | 77 (100%) | 77 (97.5%) | 79.0 | 0.00** | 1.0 | ||