Functional Polymorphisms and Gene Expression of TLR9 Gene as Protective Factors for Nasopharyngeal Carcinoma Severity and Progression

Table 1

Demographic and clinical characteristics of the study population.

Characteristics	Patients ()
		(%)
Mean age ()
Age at diagnosis (years)^a
≤35	104	32.3
>35	215	66.8
Sex^a
Women	100	31.1
Men	219	68
Tumor size^a
T1-T2	141	43.8
T3-T4	178	55.3
Lymph node status^a
N0	69	21.5
N+	250	77.6
Metastasis^a
M0	285	88.5
M+	21	6.5
Clinical stage^a
SI-SII	24	7.5
SIII-SIV	294	91.3
State after treatment^a
Complete remission (CR)	215	66.9
Locoregional recurrence (LRR)	32	9.9
Distant metastasis (DM)	31	9.6
Locoregional recurrence and distant metastasis (LRR+DM)	13	4
Death after treatment and after recurrence^a
No	252	78.3
Yes	39	12.1

: frequencies; SD: standard deviation. ^aThe sum does not equal the total due to unavailable data.