Table 1 Demographics of adenocarcinoma patients and squamous cell carcinoma patients. Data are expressed as mean ± standard deviation for age and BMI.

From: Exploratory study on classification of lung cancer subtypes through a combined K-nearest neighbor classifier in breathomics

Clinical parameters

Adenocarcinoma

Squamous cell carcinoma

Sex

   Male

125 (53.42%)

88 (96.70%)

   Female

109 (46.58%)

3 (3.30%)

Age

   Mean±SD

61 ± 7.09

62 ± 6.72

BMI

   Mean±SD

23.67 ± 3.03

22.48 ± 3.05

Smoking status

   Smoker

67

51

   Non-smoker

136

13

   Stopping smoker

31

27

Drinking status

   Drinker

48

24

   Non-drinker

167

24

   Stopping drinker

19

43

Education status

   Primary school

92

39

   High school above

116

45

   None

26

7

TNM stage

   I

110 (47.01%)

16 (17.58%)

   II

24 (10.26%)

25 (27.47%)

   III

45 (19.23%)

35 (38.46%)

   IV

55 (23.50%)

15 (16.48%)

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