Table 2 Univariate Cox analysis of the risk factors for the severity of COVID-19

 Age^a

58 ± 14

60.3 ± 14.3

0.3^ƪ

  Female^a

26 (24%)

13 (19.4%)

0.46^$

  Male^a

82 (75.9%)

54 (80.6%)

 Comorbidity^a

47 (43.5%)

49 (73.1%)

< 0.001^$

  DM^a

32 (32.6%)

31 (46.3%)

0.02^$

  HTN^a

31 (28.7%)

32 (47.8%)

0.01^$

  IHD^a

3 (2.8%)

5 (7.5%)

0.15^$

  Malignancy^a

3 (2.8%)

4 (5.9%)

0.31^$

  Renal^a

3 (2.8%)

10 (14.9%)

0.001^$

 TLC (× 10³/μl)^b

9.55 (6.7–12.5)

15.00 (10–18.8)

< 0.001^§

 Lymphocyte (/μl)^b

1611 (1259–2168)

1281 (846–2255)

< 0.001^§

 HB (g/dl)^c

13.32 ± 1.88

12.97 ± 2

0.12^ƪ

 PLT (× 10³/μl)^b

299 (230–376)

304 (217–414)

0.76^§

 AST (U/l)^b

39 (25–52)

57 (38–85)

< 0.001^§

 ALT (U/l)^b

46 (29–77)

65 (43–106)

< 0.001^§

 Urea (mg/dl)^b

47 (36–72.5)

66 (49–167)

< 0.001^§

 Creatine (mg/dl)^b

1 (0.8–1.2)

1.1 (0.9–1.9)

0.11^§

 d-dimer (μg/ml)^b

680 (427–1398)

2216.64 (908–6830)

< 0.001^§

 Ferritin (ng/dl)^b

794 (376–1415)

2198 (890–2645)

< 0.001^§

 CRP (mg/l)^b

74.60 (31.7–126)

173.8 (80.4–263.3)

< 0.001^§