Negative second 5mci diagnostic dose WBS image results after six months at the initial RAI treatment
| Findings at 1st RAI treatment | Star artifact(+) | Star artifact(-) | P value |
| Total(n=809) | 332/386(86%) | 354/423(83.6%) | 0.459 |
| sTg<0.2ng/ml(n=151) | 36/43(83.7%) | 96/108(88.9%) | 0.388 |
| sTg<1ng/ml(n=236) | 76/88(86.3%) | 129/148(87.2%) | 0.861 |
| sTg<2ng/ml(n=396) | 115/129(89.1%) | 234/267(87.6%) | 0.664 |
| sTg<10ng/ml(n=637) | 248/278(89.2%) | 308/359(85.7%) | 0.199 |
| sTg>10ng/ml(n=172) | 83/108(76.8%) | 46/64(71.8%) | 0.466 |