Prognostic parameters for recurrence of papillary thyroid microcarcinoma

BMC Cancer

Table 6 Multivariate subgroup analyses of association of clinical recurrence in 251 patients with PTMC according to surgical extent after excluding patients without pathologic N staging information

Baseline characteristics	Patients with total or near-total thyroidectomy (n = 150)			Patients with hemi- or subtotal thyroidectomy (n = 101)			Overall (n = 251)
	HR	95% CI	P	HR	95% CI	P	HR	95% CI	P
Gender
Men	4.58	1.08–19.5	0.04	24.2	2.17–270	0.01	6.51	1.97–21.5	0.002
Women	1.00	-	-	1.00	-	-	1.00	-	-
Lymph node metastasis			0.053						0.04
pN0	0	NC	0.99				0	NC	0.99
pN1a^a	1.00	-	-				1.00	-	-
pN1b^b	7.32	1.46–36.7	0.015				4.71	1.42–15.6	0.01

^a Metastases to level VI lymph nodes (pretracheal, paratracheal, and prelaryngeal/Delphian lymph nodes), classified as N1a in the 2002 TNM staging.
^b Metastases to unilateral, bilateral, or contralateral cervical superior mediastinal lymph nodes, classified as N1b in the 2002 TNM staging.
HR, hazard ratio; CI, confidence interval; NC, cannot calculate

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