Table 2 Predictive value of the overall primary and nodal neck lesions according to NI-RADS categories
NI-RADS | Recurrence | Fisher’s exact test | Cramér’s (V) | Linear by linear association | ||||
|---|---|---|---|---|---|---|---|---|
Positive recurrence (PPV%) | Negative recurrence rate (NPV%) | Value | P | Value | P | Value | P | |
Primary lesion | Â | Â | 23.12 | < 0.000 | 0.577 | < 0.000 | 21.64 | < 0.000 |
 NI-RADS 1 | 3/32 (9.4%) | 29/32 (90.6%) |  |  |  |  |  |  |
 NI-RADS 2 | 7/27 (25.9%) | 20/27 (74.1%) |  |  |  |  |  |  |
 NI-RADS 3 | 12/15 (80%) | 3/15 (20%) |  |  |  |  |  |  |
Total | 22/74 (29.7%) | 52/74 (70.3%) | Â | Â | Â | Â | Â | Â |
LN lesion | Â | Â | 31.28 | < 0.000 | 0.726 | < 0.000 | 37.1 | < 0.000 |
 NI-RADS 1 | 2/55 (3.6%) | 53/55 (96.4%) |  |  |  |  |  |  |
 NI-RADS 2 | 2/8 (25%) | 6/8 (75%) |  |  |  |  |  |  |
 NI-RADS 3 | 9/11 (81.8%) | 2/11 (18.2%) |  |  |  |  |  |  |
Total | 13/74 (17.6%) | 61/74 (82.4%) | Â | Â | Â | Â | Â | Â |
Combined primary and LN | Â | Â | 57.06 | < 0.000 | 0.650 | < 0.000 | 57.96 | < 0.000 |
 NI-RADS 1 | 5/87 (5.7%) | 82/87 (94.3%) |  |  |  |  |  |  |
 NI-RADS 2 | 9/35 (25.7%) | 26/35 (74.3%) |  |  |  |  |  |  |
 NI-RADS 3 | 21/26 (80.8%) | 5/26 (19.2%) |  |  |  |  |  |  |
Total | 35/148 (23.6%) | 113/148 (76.4%) | Â | Â | Â | Â | Â | Â |