Table I: Risk Factors for Mortality in SARS-CoV-2 Patients Infected with Different Variants
Co-morbidities Co-morbidities Delta Variant Delta Variant Delta Variant Delta Variant Omicron Variant Omicron Variant Omicron Variant Omicron Variant
Survived (n=74) Succumbed (n=26)
Odds ratio
95% CI
Survived (n=90)
Succumbed (n=10)
Odds ratio
95% CI
Hypertension
Hypertension
47.3% (35) 53.8% (14)
1.3
(0.51, 3.18)
30% (27) 70% (7)
5.44
(1.31, 22.65)
Diabetes
Diabetes
27% (20) 26.9% (7)
0.99
(0.36, 2.27)
25.6% (23) 40% (4)
1.94
(0.50, 7.50)
Chronic obstructive pulmonary disease
Chronic obstructive pulmonary disease
21.6% (16) 30.8% (8)
1.61
(0.59, 4.38)
10% (9) 20% (2)
2.25
(0.41, 12.26)
Chronic kidney disease
Chronic kidney disease
5.4% (4) 15.4% (4)
3.18
(0.73, 13.78)
1.1% (1)
0%
0.89
(0.84, 0.96)
Smoking
Smoking
9.5% (7) 15.4% (4)
1.74
(0.46, 6.51)
30% (27) 40% (4)
1.55
(0.41, 5.96)
Chronic liver disease
Chronic liver disease
1.4% (1) 7.7% (2)
6.08
(0.53, 70.0)
NA
NA
NA
NA
Chronic heart disease
Chronic heart disease
9.5% (7) 11.5% (3)
1.25
(0.29, 5.23)
NA
NA
NA
NA
Oxygen requirement
Oxygen requirement
66.2% (49) 100% (26)
p = 0.001
p = 0.001
56.1% (51) 100% (10)
p = 0.008
p = 0.008
Length of Stay (Mean ± SD) (days) Length of Stay (Mean ± SD) (days)
8.4 ± 4.6
5.2 ± 4.1
-
-
6.58 ± 3.89
12.10 ± 4.06
-
-
LOS ≤48 hours 6.8% 30.8% - - 5.6% 0% - -
48 hours – 7 Days
40.5%
38.4%
-
-
73.3%
20%
-
-
>7 days 52.7% 30.8% - - 21.1% 80% - -