Table 2. Pre- and Post-induction PET Results.
| Pre-induction PET (N=99) | Post-induction PET (N=80) | |
|---|---|---|
| T Status | ||
| Non-avid | 1 (1.0%) | 10 (13%) |
| No value reported | 1 (1.0%) | -- |
| Non-numerical value reported | 4 (4.0%) | 1 (1.3%) |
| Numerical value reported | 93 (94%) | 69 (86%) |
| SUVmax N among numerical values | 9.8 (6.2, 14.7) | 5.0 (3.0, 9.8) |
| N Status | ||
| Non-avid | 6 (6.1%) | 36 (45%) |
| No value reported | 1 (1.0%) | 1 (1.3%) |
| Non-numerical value reported | 6 (6.1%) | 2 (2.5%) |
| Numerical value reported | 86 (87%) | 41 (51%) |
| SUVmax T among numerical values | 6.5 (3.8, 9.5) | 3.3 (2.7, 4.5) |
| N2 Status | ||
| N2-Negative | 6/92 (6.5%) | 36/77 (47%) |
| N2-Avid | 85/92 (93%) | 41/77 (53%) |
| PET Response to Induction Therapy: Change from Pre- to Post-induction values* | SUVmax T (N=77) | SUVmax N (N=76) |
| Pre- to Post-induction | ||
| No change | 1 (1.3%) | 6 (7.9%) |
| Decreased | 65 (84%) | 61 (80%) |
| Increased | 11 (14%) | 9 (12%) |
| Not interpretable | 2 | 3 |
Data presented as N(%) or median (25th, 75th percentile).
*
Pre- and post-PET scans available for 79 patients; 77 with interpretable change in SUVmax T and 76 with interpretable change in SUVmax N2. Non-numeric descriptions in post-induction PET cannot be categorized as a change unless pre-induction PET is also a non-numeric description.
PET = positron emission scan; SUVmax = Maximum standardized uptake values