Table 1 Baseline characteristics of study participants

Age

0.702

< 76

54

18

33.3

36

66.7

> 76

60

18

30.0

42

70.0

BMI

0.152

Normal

36

12

33.3

24

66.7

Overweight

44

18

40.9

26

59.1

Obese

19

3

15.8

16

84.2

Education

0.916

Primary school and below

49

16

32.7

33

67.3

Junior high school

38

12

31.6

26

68.4

Senior high school

10

4

40

6

60

College or above

2

1

50

1

50

Residence

0.308

Urban

85

30

35.3

55

64.7

Rural

14

3

21.4

11

78.6

Smoking status

0.743

Never

27

9

33.3

18

66.7

Ex-smoker

40

12

30.0

28

70.0

Smoker

31

12

38.7

19

61.3

Drinking status

0.047

Never

22

4

18.2

18

81.8

Abstainer

39

11

28.2

28

71.8

Drinker

38

18

47.4

20

52.6

Tuberculosis contacting history

0.460

No

93

30

32.3

63

67.7

Yes

4

2

50

2

50

Tuberculosis disease history

0.833

No

86

29

33.7

57

66.3

Yes

13

4

30.8

9

69.2

Diabetes

0.879

No

67

22

32.8

45

67.2

Yes

32

11

34.4

21

65.6