Risk factors and outcomes of metastatic poorly differentiated thyroid carcinoma

Table 4 Risk factors associated with distant metastasis in poorly differentiated thyroid carcinoma patients, n (%)

	M0 (n = 18)	M1 + M2 (n = 21)	Univariate OR (95%CI)	P value
Age
< 45 years	10 (55.6)	4 ((19.0)	Reference
≥ 45 years	8 (44.4)	17 (81.0)	5.31 (1.27–22.2)	0.018
Sex
Female	13 (72.2)	12 (57.1)	Reference
Male	5 (27.8)	9 (42.9)	1.95 (0.51–7.49)	0.328
Tumor size
≤ 2 cm	3 (16.7)	0	Reference
> 2-4 cm	6 (33.3)	9 (45.0)
> 4 cm	9 (50.0)	11 (55.0)	1.72 (0.62–4.83)	0.301
T stage
T1/T2	7 (38.9)	6 (28.6)	Reference
T3/T4	11 (61.1)	15 (71.4)	1.59 (0.42–6.07)	0.496
N stage
N0	17 (94.4)	18 (85.7)	Reference
N1	1 (5.6)	3 (14.3)	2.83 (0.27–29.9)	0.370