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Table 1 Mortality by demographics and clinical characteristics: bivariate analysis (n = 3663)

From: Developing a mortality risk prediction model using data of 3663 hospitalized COVID-19 patients: a retrospective cohort study in an Egyptian University Hospital

 

Total

Mortality

Unadjusted HRa (95% CI)

P-value

n = 3663

n = 972 (26.5) 95% CI (25.1–28.0%)

n (column%)

n (column%)

Age: median (IQR)

58 (41–68)

66 (55–75)

 

 < 0.001

  < 15

165 (4.5)

32 (3.3)

Ref

 

 15–34

498 (13.6)

61 (6.3)

0.72 (0.47–1.10)

0.125

 35–54

912 (24.9)

141 (14.5)

0.82 (0.56–1.21)

0.322

 55–74

1618 (44.2)

490 (50.4)

1.55 (1.08–2.22)

0.016

  ≥ 75

470 (12.8)

248 (25.5)

2.91 (2.03–4.21)

 < 0.001

Gender

 Female

1698 (46.4)

438 (45.1)

Ref

 

 Male

1965 (53.6)

534 (54.9)

1.05 (0.93–1.19)

0.440

Tobacco use

Never

3419 (93.3)

877 (90.2)

Ref

 

 Former

74 (2.0)

28 (2.9)

1.29 (0.88–1.88)

0.194

 Current

170 (4.6)

67 (6.9)

1.70 (1.32–2.18)

 < 0.001

Condition on admission

 Asymptomatic/Mild

368 (10.0)

29 (3.0)

Ref

 

 Moderate

911 (24.9)

97 (10.0)

1.64 (1.08–2.48)

0.020

 Severe

1447 (39.5)

238 (24.5)

2.48 (1.69–3.65)

 < 0.001

 Critical

937 (25.6)

608 (62.6)

10.14 (6.99–14.72)

 < 0.001

Comorbidities

 No

2014 (55.0)

384 (39.5)

Ref

 

 Yes

1649 (45.0)

588 (60.5)

1.79 (1.57–2.03)

 < 0.001

Patients presented in complications

 No

3481 (95.0)

858 (88.3)

Ref

 

 Yes

182 (5.0)

114 (11.7)

2.73 (2.24–3.31)

 < 0.001

Hospital stay: median (IQR)

8 (4–12)

7 (4–12)

 

0.010

  > 1Day

3433 (93.7)

863 (88.8)

Ref

 

  ≤ 1Day

230 (6.3)

109 (11.2)

2.68 (2.05–3.51)

 < 0.001

  1. HR Hazard ratio, CI Confidence interval
  2. Bold indicates statistical significance
  3. aBivariate Cox regression analysis was used