Thyroid Isthmus Length and Iodine Turnover as Predictors of Successful Radioactive Iodine Therapy in Patients with Graves’ Disease

Table 3

Multivariate logistic regression analysis of factors associated with persistent hyperthyroid status after radioactive iodine therapy.

Factor	OR (95% CI)
Age, years	0.99 (0.95–1.05)	0.841
Sex (female)	1.33 (0.30–5.85)	0.711
BMI, kg/m^2	0.95 (0.77–1.16)	0.592
Isthmus length, mm
≤5.2	Reference
>5.2	4.50 (1.18–17.24)	0.028
2-hour/24-hour ^131I uptake ratio
≤0.8	Reference
>0.8	8.10 (2.10–31.23)	0.002
Administered ^131I dose, mCi	0.85 (0.58–1.25)	0.406
TSH receptor antibody, IU/L	1.01 (0.96–1.06)	0.755

BMI: body mass index.