Preablation Stimulated Thyroglobulin/TSH Ratio as a Predictor of Successful I¹³¹Remnant Ablation in Patients with Differentiated Thyroid Cancer following Total Thyroidectomy

Table 3

Univariate analysis of various patient and tumor characteristics and unsuccessful ablation.

Variable	OR (95% CI)	𝑃 value
Age
40 or less	1
More than 40	0.7 (0.28–1.77)	0.457
Gender
Male	1
Female	0.96 (0.38–2.43)	0.924
Size of tumor
>4 cm	1
<4 cm	2.02 (0.73–5.63)	0.176
Capsular invasion
No	1
Yes	2.71 (0.90–8.21)	0.077
Lymph node involvement
No	1
N1a	7.58 (1.31–43.92)	0.024
N1b	2.02 (0.43–9.6)	0.371
Nx	4.33 (0.99–18.87)	0.051
Distant metastasis
M0	1
M1	3.31 (0.57–9.34)	0.18
ETA risk
Low risk	1
Intermediate risk	0.95 (0.15–5.96)	0.956
High risk	2.26 (0.81–6.32)	0.120
sTg
≤18 ng	1
>18 ng	11.17 (3.71–33.61)	<0.001*
sTg/TSH
≤0.35	1
>0.35	15.56 (4.9–49.44)	<0.001*

^∗𝑃-value < 0.005.