Table 2 Clinical and demographic characteristics of lung cancer patients and controls.

From: Identifying polymorphic cis-regulatory variants as risk markers for lung carcinogenesis and chemotherapy responses in tobacco smokers from eastern India

Variable

Cases, N = 101

Controls, N = 401

p-value

Age

–

–

–

 < 39

8

0

 

 40–49

8

0

 

 50–59

28

72

 

 60–69

43

212

 

 ≥ 70

14

115

 

Mean ± SD

58.65 ± 12.12

66.14 ± 7.83

< 0.001***

Pack years

 < 20

9

103

 

 20–49

26

156

 

 ≥ 50

66

130

 

Mean ± SD

66.92 ± 34.95

59.29 ± 37.47

0.064

Gender

 Male

80

400

< 0.001***

 Female

21

1

 

Tumour histology

 Adenocarcinoma (ADC)

50

  

 Squamous cell carcinoma (SqCC)

39

  

 Small cell lung cancer (SCLC)

13

  

 Others

1

  

TNM staging

 I

2

  

 II

11

  

 III

48

  

 IV

40

  

 Unknown

2

  

Metastasis

 No

9

  

 Yes

91

  
  1. SD standard deviation, N total number of case-patients or control subjects.
  2. p-values for sex were derived from the Chi-square test; the Student t-test was used for age and pack-years. All P-values are two-sided. p < 0.05 was considered statistically significant.
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