Table 1 Baseline characteristics of both groups

Age (year)

49.47 ± 10.96

59.88 ± 13.08

0.01

Sex

0.01

 Male

68 (67.3%)

23 (44.2%)

 Female

33 (32.7%)

29 (55.8%)

Smoking

0.92

 Current smoking

34 (33.7%)

18 (34.6%)

 None

40 (39.6%)

22 (42.3%)

 Stopped smoker

18 (17.8%)

9 (17.3%)

 Ex-smokers

9 (8.9%)

3 (5.8%)

Comorbid diseases

20 (19.8%)

16 (30.8%)

0.04

CURB-65

3.33 ± 0.92

3.96 ± 1.13

< 0.001

PSI

123.39 ± 42.62

134.92 ± 51.84

0.01

class

0.01

 II

15 (15%)

5 (9.6%)

 III

32 (31.7%)

12 (23.1%)

 IV

30 (29.7%)

14 (26.9%)

 V

24 (23.6%)

21 (40.4%)

Laboratory data

 RDW (%)

15.50 ± 2.81

16.50 ± 3.54

0.02

 Delta MPV

1.78 ± 0.76

2.61 ± 1.01

0.01

 WBCs (× 10⁹/l)

13.80 ± 6.51

13.91 ± 7.93

0.92

 Platelets (× 10⁹/l)

269.40 ± 54.87

269.90 ± 99.93

0.98

PaO₂ /Fio₂

166.37 ± 62.27

182.96 ± 64.68

0.12

Hospital stay (day)

12.97 ± 5.67

14.25 ± 6.80

0.22

Need to MV

38 (37.6%)

21 (40.4%)

0.68

Transfer to ICU

51 (50.5%)

31 (59.6%)

0.18

Radiological findings

0.45

 Unilobar pneumonia

68 (67.3)

32 (61.5%)

 Multilobar pneumonia

33 (32.7%)

20 (38.5%)

 Effusion

17 (16.8%)

11 (21.2%)

Positive blood culture

2 (2%)

6 (11.5%)

0.07

Positive sputum culture

95 (94.1%)

46 (88.5%)

0.46