Table 1.
Baseline Demographics, All Patients
| No RAI (n=12022) | Yes RAI (n=13211) | p Value | |
|---|---|---|---|
| Age (years), mean±SD | 49.7±16.1 | 46.3±15.4 | <0.0001a |
| Tumor size, n (%) | <0.0001b | ||
| 0–9 mm | 4451 (40.0%) | 2047 (16.2%) | |
| 10–19 mm | 2680 (24.1%) | 4067 (32.1%) | |
| 20–39 mm | 2653 (23.8%) | 4663 (36.8%) | |
| 40+ mm | 1343 (12.1%) | 1884 (14.9%) | |
| Stage, n (%) | <0.0001b | ||
| Local | 9001 (74.9%) | 7440 (56.3%) | |
| Regional | 2387 (19.9%) | 5059 (38.3%) | |
| Remote | 634 (5.3%) | 712 (5.4%) | |
| Charlson comorbidity score excluding tumor, mean±SD | 0.52±1.15 | 0.38±0.89 | <0.0001c |
| Cancer-related hospitalization rate following initial therapy (# per patient-year) | 0.27 | 0.27 | 0.54d |
a
t test.
b
χ2 test.
c
Wilcoxon two-sample test.
d
Negative binomial regression.
RAI, radioactive iodine; SD, standard deviation.