Table 1. Patient Characteristics Grouped According to Ipsilateral-to-Injection-Site Axillary Nodal Reactivitya.
| Parameter | No. (%) | |
|---|---|---|
| Nonreactive | Reactive | |
| Patients | 59 (87) | 9 (13) |
| Age, y | ||
| Mean (SD) [range] | 76 (8) [53-89] | 69 (12) [46-83] |
| <80 | 40 (68) | 7 (78) |
| ≥80 | 19 (32) | 2 (22) |
| Sex (% women) | 29 (49) | 7 (78) |
| Vaccine to PET scan time, median (range), d | 12 (1-47) | 10 (3-20) |
| Vaccine type | ||
| Pfizer | 47 (92) | 4 (8) |
| Moderna | 12 (71) | 5 (29) |
| Vaccine dose | ||
| 1st Dose, total | 39 (95) | 2 (5) |
| 2nd Dose total | 20 (74) | 7 (26) |
| 1st Dose, Moderna | 9 (90) | 1 (10) |
| 1st Dose, Pfizer | 30 (97) | 1 (3) |
| 2nd Dose, Moderna | 3 (43) | 4 (57) |
| 2nd Dose, Pfizer | 17 (85) | 3 (15) |
| Absolute neutrophil count, ×1000/μLb | ||
| Normal | 31 | 9 |
| Abnormal (low) | 5 | 0 |
| Abnormal (high) | 3 | 0 |
| Not available | 17 | 3 |
Abbreviation: PET, positron emission tomography.
a
Nodes with activity greater than the mediastinal blood pool are classified as reactive.
b
Normal range, 1.0-11.0 × 1000/μL