Table 1 Basic information of study participants (values are expressed as mean ± standard deviation)

Number of cases

220 (53.9%)

188 (46.1%)

Smoking

173 (78.6%)

132 (70.2%)

Age

78.8 ± 9.1

81.5 ± 9.2

Sex (male)

188 (85.5%)

157 (83.5%)

Sex (female)

32 (14.5%)

31 (16.5%)

Number of hospitalization

3.6 ± 2.6

6.5 ± 7.3

Temperate

36.8 ± 0.5

36.7 ± 0.6

Respiratory rate

21.7 ± 3.2

24.7 ± 6.4

Systolic pressure

133.1 ± 19.1

131.6 ± 24.7

Diastolic pressure

75.8 ± 12.3

74.4 ± 13.4

Cor pulmonary

43 (19.55%)

64 (34.04%)

Bronchiectasis

13 (5.91%)

8 (4.26%)

Hypertension

96 (43.64%)

73 (38.83%)

Diabetes

21 (9.55%)

34 (18.09%)

Coronary disease

24 (10.91%)

29 (15.43%)

Chronic kidney diseases

6 (2.73%)

4 (2.13%)

Malignant tumour

18 (8.18%)

16 (8.51%)

Cerebrovascular disease1

9 (4.09%)

8 (4.26%)

Viral hepatitis

3 (1.36%)

2 (1.06%)

Liver cirrhosis

1 (0.45%)

1 (0.53%)