Table 1 Demographic, clinical, laboratory findings of patients on admission

Age, Years

69.52 ± 7.25

68.93 ± 7.00

72.05 ± 8.36

0.038

 Female

57(50.00%)

38(50.00%)

19(50.00%)

1.000

 Male

57(50.00%)

38(50.00%)

19(50.00%)

Body Mass Index

23.46 ± 3.18

23.57 ± 3.23

23.20 ± 3.08

0.576

Smoking

19(16.67%)

12(15.79%)

7(18.42%)

0.722

 Hypertension

57(50.00%)

37(48.68%)

20(52.63%)

0.691

 Diabetes

20(17.54%)

14(18.42%)

6(15.79%)

0.728

 Coronary heart disease

10(8.77%)

4(5.26%)

6(15.79%)

0.061

 Stroke

6(5.26%)

2(2.63%)

4(10.53%)

0.075

 Cancer

9(7.89%)

7(9.21%)

2(5.26%)

0.461

 Chronic pulmonary disease

14(12.28%)

8(10.52%)

6(15.79%)

0.420

 Chronic kidney disease

7(6.14%)

4(5.26%)

3(7.89%)

0.581

 Fever

87(76.32%)

60(78.95%)

27(71.05%)

0.350

 Fatigue

66(52.63%)

38(50.00%)

28(73.68%)

0.019

 Myalgia

10(8.77%)

6(7.89%)

4(10.53%)

0.640

 Pharyngalgia

4(3.51%)

3(3.95%)

1(2.63%)

0.710

 Dry cough

72(63.16%)

47(61.84%)

25(65.79%)

0.680

 Expectoration

37(32.46%)

24(31.58%)

13(34.21%)

0.777

 Hemoptysis

5(4.39%)

4(5.26%)

1(2.63%)

0.518

 Dyspnea

46(40.35%)

24(31.58%)

22(57.89%)

0.007

 Chest pain

4(3.51%)

2(2.63%)

2(5.26%)

0.472

 Anorexia

69(60.53%)

41(53.95%)

28(73.68%)

0.042

 Diarrhea

12(10.53%)

9(11.84%)

3(7.89%)

0.517

 Nausea

11(9.65%)

6(7.89%)

5(13.16%)

0.370

 White blood cell count (× 10⁹/L)

6.50(5.28–8.52)

6.48(5.34–8.51)

6.85(4.89–9.72)

0.016

 Neutrophil count (×10⁹/L)

4.19(3.01–5.91)

4.78(3.40–5.95)

5.14(3.46–8.59)

0.002

 Lymphocyte count (×10⁹/L)

0.82(0.58–1.13)

0.90(0.66–1.35)

0.69(0.52–1.12)

0.002

 Platelet (×10⁹/L)

204.00(161.00–265.00)

199.00(171.00–261.00)

215.50(152.00–270.50)

0.766

 Hemoglobin, g/L

120.00 ± 20.91

116.87 ± 21.06

126.50 ± 18.46

0.018

 Albumin, g/L

34.90(32.10–37.45)

34.10(32.20–36.50)

36.85(32.30–38.25)

0.147

 Creatinine, μmol/L

65.00(53.00–79.00)

61.00(53.00–82.00)

65.00(49.00–73.00)

0.274

 D-Dimer, mg/L

1.55(0.69–4.65)

1.07(0.56–2.47)

2.23(1.17–7.80)

0.013

 C-reactive protein, mg/L

59.10(21.30–110.20)

61.30(21.30–110.70)

53.05(21.75–99.00)

0.651

 Procalcitonin, ng/mL

0.09(0.06–0.21)

0.07(0.05–0.22)

0.10(0.06–0.18)

0.003

 BNP, pg/mL

270.50(135.00–661.00)

266.80(122.70–457.50)

348.40(159.50–813.70)

0.027

 CD + 3, count/μl

518.00(317.00–804.00)

538.00(345.00–850.00)

432.00(235.00–707.00)

0.007

 CD + 4, count/μl

348.00(212.00–513.00)

378.00(230.00–559.00)

277.00(150.50–476.50)

0.006

 CD + 8, count/μl

167.00(81.00–279.00)

193.00(94.00–258.00)

122.50(76.00–285.00)

0.013