Table 3. Relationship between PLK1 expression and clinicopathlogical parameters other than tumour size of papillary carcinoma excluding incidental carcinoma.

	Low	High	Total
Age (years) (mean±s.d.)	56.4±11.4	53.3±14.6
		NS
Gender
Male	5	3	8
Female	40	27	67
		NS
Lymph node metastasis
Absent	19	12	31
Present	26	18	44
		NS
Multiple tumour formation
Absent	24	20	44
Present	21	10	31
		NS
UICC stage
I	13	18	31
II	14	5	19
III or IV	18	7	25
	P=0.0093 (stage I vs stage ⩾II)
Extrathyroidal invasion
Absent	29	26	55
Present	16	4	20
Solid, scirrhous, or trabecular growth patterns
Absent	21	26	47
Present	24	4	28
Ki-67 LI
Low	35	23	58
High	10	7	17
		NS
Total	45	30	75