Plasma Vascular Endothelial Growth Factor Dysregulation in Defining Aggressiveness of Head and Neck Squamous Cell Carcinoma

Table 1

Characteristics of the study population.

Characteristic	Patient (𝑛=82)	Normal (𝑛=32)
Age, y
Mean (range)	58.4 (16–83)	31.7 (22–51)
Sex, 𝑛 (%)
Male	64 (79)	7 (22)
Female	17 (21)	25 (78)
Primary site, 𝑛 (%)
Nasopharynx	17 (20.7)
Oral cavity	23 (28)
Oropharynx	12 (14.6)
Hypopharynx	15 (18.3)
Larynx	15 (18.3)
T stage, 𝑛 (%)
T1-2	29 (35.4)
T3-4	53 (64.6)
Node status, 𝑛 (%)
Negative	40 (48.8)
Positive	42 (51.2)
TNM stage, 𝑛 (%)
I-II	18 (22.)
III-IV	64 (78)
Histological grade, 𝑛 (%)
Well differentiated (G1)	31 (37.8)
Moderately differentiated (G2)	19 (23.2)
Poorly differentiated (G3)	22 (26.8)
Undifferentiated (G4)	10 (12.2)