Table 4 Univariate Cox analysis of COVID-19 risk factors for mortality

Age

57.085 ± 13.3

66.265 ± 15.18

0.002^ƪ

 Female^a

34 (24.1%)

5 (14.7%)

0.21^$

 Male^a

107 (75.9%)

29 (85.3%)

Comorbidity^a

71 (50.35%)

25 (73.5%)

0.02^$

 DM^a

50 (35.46%)

13 (38.2%)

0.84^$

 HTN^a

46 (32.62%)

17 (50%)

0.05^$

 IHD^a

5 (3.55%)

3 (8.8%)

0.18^$

 Malignancy^a

4 (2.84%)

3 (8.8%)

0.13^$

 Renal disease^a

5 (3.55%)

8 (23.5%)

< 0.001^$

 Respiratory co-infection

6 (4.26%)

13 (38.24%)

< 0.001^$

Severe/critical^a

37 (26.2%)

30 (88.2%)

< 0.001^$

Oxygen use^a

76 (53.9%)

34 (100%)

< 0.001^$

 Standard oxygen^a

74 (52.48%)

17 (50%)

0.84^$

 HFNC^a

22 (15.6%)

10 (29.4%)

0.06^$

 NIV^a

7 (4.9%)

8 (23.5%)

0.001^$

 IMV^a

4 (2.8%)

32 (94.12%)

< 0.001^$

 TLC (× 10³/μl)^b

10 (6.9–13)

17.9 (13.1–24.2)

< 0.001^§

 Lymphocyte (/μl)^b

1650 (1218–2267)

1093 (765–1476)

< 0.001^§

 HB (g/dl)^c

13.34 ± 1.88

12.547 ± 2.054

0.03^ƪ

 PLT (× 10³/μl)^b

319 (235.5–407)

272.5 (187.5–347.5)

0.009^§

 AST (U/l)^b

39 (28–57.5)

74.5 (49.2–133.2)

< 0.001^§

 ALT (U/l)^b

50 (32–78.5)

70.5 (39.7–168.2)

0.01^§

 Urea (mg/dl)^b

47 (39–67)

156.5 (93.2–212.2)

< 0.001^§

 Creatine (mg/dl)^b

1 (0.9–1.3)

1.5 (0.8–3.4)

0.008^§

 d-dimer (μg/ml)^b

711.21 (459.7–1396)

5907.4 (2414.7–8497.1)

< 0.001^§

 Ferritin (ng/ml)^b

890 (457.5–1555.5)

2593.5 (1361.7–3913.7)

< 0.001^§

 CRP (mg/l)^b

87.7 (34.2–157.9)

223.7 (84.7–290.3)

< 0.001^§