Table 1 Baseline characteristics of patients

Age (years)

65–87 (Median = 67)

Gender

Male

203 (71.73)

Female

80 (28.27)

KPS

90

225 (79.51)

< 90

58 (20.49)

ALBI

-3.62 to -1.60 (Median = -2.70)

NLR

0.61–7.84 (Median = 2.16)

ACCI

2

121 (42.76)

3

93 (32.86)

4

41 (14.49)

≥ 5

28 (9.89)

T classification

T1

37 (13.07)

T2

51 (18.02)

T3

106 (37.46)

T4

89 (31.45)

N classification

N0

30 (10.60)

N1

127 (44.88)

N2

101 (35.69)

N3

25 (8.83)

Stage

Stage I

6 (2.12)

Stage II

41 (14.49)

Stage III

128 (45.23)

Stage IVA

108 (38.16)

EBV DNA_pre (copies/mL)

0-9.85×10⁵ (Median = 2310)

Treatment modality

RT alone

57 (20.14)

IC + RT

82 (28.98)

CCRT

29 (10.25)

IC + CCRT

115 (40.64)