Demographics of All Respondents
| 1997–2009 (n = 1,258) | 2011–2018 (n = 1,111) | ||||
| Question | n | % | n | % | P |
| Sex | 0.954 | ||||
| Total answers | 1,250 | 1,105 | |||
| Female | 1,141 | 91.28 | 1,008 | 91.22 | |
| Age at 131I therapy (y), mean ± SD | 44 ± 11 (range, 18–85) | — | 45 ± 12 (range, 18–80) | — | 0.004 |
| Level of education | 0.014 | ||||
| Total answers | 1,253 | 1,066 | |||
| Elementary school | 0 | 0.00% | 0 | 0.00% | |
| Middle school | 2 | 0.16% | 2 | 0.19% | |
| High school | 253 | 20.19% | 156 | 14.63% | |
| College | 662 | 52.83% | 613 | 57.50% | |
| Graduate school | 336 | 26.82% | 295 | 27.67% | |