BMC Cancer

Table 2 Relationship between serum fibrinogen levels and clinical characteristics in the training and testing sets of PTC patients

From: Using a nomogram based on preoperative serum fibrinogen levels to predict recurrence of papillary thyroid carcinoma

	Training set			Testing set
	Serum fibrinogen level			Serum fibrinogen level
Factor	Low	High	p	Low	High	p
All patients	402	12		575	34
Age (years)			0.017			0.693
≤45	239	3		328	18
>45	163	9		247	16
Age (years)			0.046			0.378
≤55	349	8		474	26
>55	53	4		101	8
Gender			0.441			0.394
Female	295	10		400	26
Male	107	2		175	8
Postoperative RAI			0.683			0.884
Yes	221	7		324	20
No	181	5		251	14
Race			0.215			0.906
Han	392	11		560	33
Other	10	1		15	1
BRAF mutation			0.642			0.073
Positive	49	2		125	3
Negative	74	3		84	4
Unknown	279	7		366	27
T classification			0.001			0.001
T1	160	0		189	8
T2	8	3		12	1
T3	181	5		279	15
T4	53	4		95	10
PTC nodule number			0.001			<0.001
Single	345	6		509	22
Multiple	57	6		66	12
Capsule invasion			0.068			0.036
Presence	194	10		266	22
Absence	208	2		309	12
Strap muscles invasion			<0.001			0.013
Presence	40	6		68	9
Absence	362	6		507	25
RLN invasion			<0.001			0.001
Presence	9	2		44	8
Absence	393	10		531	26
Esophagus invasion			<0.001			0.009
Presence	6	2		18	4
Absence	396	10		557	30
Trachea invasion			<0.001			<0.001
Presence	3	3		11	5
Absence	399	9		564	29
N classification			0.186			0.604
N0	193	3		279	14
N1a	149	7		183	14
N1b	60	2		113	6
M classification			<0.001			<0.001
M0	400	10		569	30
M1	2	2		6	4
PTC recurrence			0.002			0.002
No	373	8		547	28
Yes	29	4		28	6
AJCC stage			0.004			0.047
I	268	4		392	20
II	62	2		100	3
III	70	4		77	7
IV	2	2		6	4

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ISSN: 1471-2407

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