Table 2.

Change in management.

Covariate	Statistics	Level	No N = 63	Yes N = 11	P-value*
Sex	N (Row %)	F	39 (84.78)	7 (15.22)	1
	N (Row %)	M	24 (85.71)	4 (14.29)
Aggressive histology	N (Row %)	Negative	34 (89.47)	4 (10.53)	0.605
	N (Row %)	Positive	9 (81.82)	2 (18.18)
Vascular invasion	N (Row %)	Negative	28 (87.5)	4 (12.5)	1
	N (Row %)	Positive	18 (85.71)	3 (14.29)
Extrathyroidal extension	N (Row %)	Negative	22 (78.57)	6 (21.43)	0.215
	N (Row %)	Positive	18 (94.74)	1 (5.26)
Lymph node metastasis	N (Row %)	Negative	11 (91.67)	1 (8.33)	1
	N (Row %)	Positive	45 (84.91)	8 (15.09)
Multicentricity	N (Row %)	Negative	18 (81.82)	4 (18.18)	0.461
	N (Row %)	Positive	40 (88.89)	5 (11.11)
Initial whole body scan findings	N (Row %)	Negative	50 (84.75)	9 (15.25)	1
	N (Row %)	Positive	12 (85.71)	2 (14.29)
TG (prior to PET)	N (Row %)	Low	31 (93.94)	2 (6.06)	0.044
	N (Row %)	High	24 (75)	8 (25)
TG Ab (prior to PET)	N (Row %)	Negative	16 (100)	0 (0)	<.001
	N (Row %)	Positive	4 (40)	6 (60)
PET	N (Row %)	Negative	51 (100)	0 (0)	<.001
	N (Row %)	Positive	12 (52.17)	11 (47.83)
Tg (same time with PET)	N (Row %)	Low	30 (93.75)	2 (6.25)	0.036
	N (Row %)	High	27 (75)	9 (25)
TG Ab (same time with PET)	N (Row %)	Negative	22 (100)	0 (0)	N/A
	N (Row %)	Positive	4 (100)	0 (0)
I131 PET	N (Row %)	I131(+) PET(+)	1 (100)	0 (0)	<.001
	N (Row %)	I131(+) PET(−)	3 (100)	0 (0)
	N (Row %)	I131(−) PET(+)	11 (50)	11 (50)
	N (Row %)	I131(−) PET(−)	48 (100)	0 (0)
Ultrasound	N (Row %)	Negative	53 (92.98)	4 (7.02)	0.02
	N (Row %)	Positive	7 (63.64)	4 (36.36)
Age	N		63	11	0.038
	Mean		52.7	63.27
	Median		52	64
Tumor size (cm)	N		47	6	0.33
	Mean		2.66	3.65
	Median		2.2	2.6

^*The p-value is calculated by ANOVA for numerical covariates; and chi-square test or Fisher’s exact for categorical covariates, where appropriate