Table 3 Univariate analysis for overall survival

Age — years

169

  < 70

123

90

1

  ≥ 70

46

32

1.074

0.717 to 1.608

Patient sex

169

 Male

110

83

1

 Female

59

39

0.805

0.550 to 1.179

Smoking status

169

 Current or former smoker

147

108

1

 Never smoker

22

14

0.813

0.465 to 1.419

Performance status OMS

167

 0–1

134

91

1

  ≥ 2

33

30

2.881

1.885 to 4.405

Histologic subtype

141

 Adenocarcinoma

87

67

1

 Squamous cell carcinoma

37

31

1.221

0.797 to 1.871

 other

17

15

1.711

0.974 to 3.003

Stage

169

 Local/Loco-regional (I-III)

86

49

1

 Advanced (IV)

83

73

3.039

2.083 to 4.433

CD8+ T Lymphocytes

169

  ≥ 224 /μl

119

86

1

  < 224 /μl

50

36

0.998

0.676 to 1.472

CD4+ T lymphocytes

169

  ≥ 500 /μl

121

81

1

  < 500 /μl

48

41

1.616

1.107 to 2.358

Total lymphocytes count

169

  ≥ 1000 /μl

129

73

1

  < 1000 /μl

40

28

1.65

1.06 to 2.56