Table 2.

The comparation of early hypothyroid risk factors between non-hypothyroid group and hypothyroid group

Variables	Non-hypothyroid	Hypothyroid	P value
Male: Female	4: 90	50: 168	0.001
Age (years)	43.82 ± 13.17	45.60 ± 12.63	0.261
Duration of Graves’ hyperthyroidism (months)	12 (1, 240)	6 (1, 376)	0.019
ATD therapy history: Non-ATD therapy history	63: 20	184: 45	0.393
Thyroid weight (g)	60.83 (23.02, 239.00)	49.82 (19.12, 163.3)	0.001
FT3 (pmol/L)	22.48 (4.68, 36.70)	21.33 (4.35, 36.69)	0.341
FT4 (pmol/L)	57.75 (3.51, 154.80)	49.55 (13.04, 154.80)	0.091
TSH (uIU/mL)	0.005 (0.001, 0.100)	0.005 (0.001, 0.250)	0.304
TPOAb (IU/mL)	1300 (23.30, 1300.00)	1300 (27.00, 1300.00)	0.514
TRAb (IU/mL)	13.56 (0.30, 40.00)	12.72 (0.30, 40.00)	0.601
2-h RAIU	39.86 (7.80, 83.69)	35.49 (9.01, 81.98)	0.009
6-h RAIU	70.38 (14.40, 95.62)	65.41 (16.53, 95.51)	0.001
24-h RAIU	74.20 (29.10, 99.90)	71.37 (27.29, 97.11)	0.008
6/24-h uptake ratio	94.59 (49.48, 115.87)	90.94 (51.77, 126.70)	0.015
Dose of RAI (mCi)	9.48 ± 3.08	8.52 ± 2.78	0.007

FT3 Free triiodothyronine; FT4 Free thyroxine; TSH Thyrotropin; TPOAb Thyroperoxidase antibody; TRAb Thyrotropin receptor antibody; RAIU Radioactive iodine uptake