Table 2 Logistic regression analysis of COVID-19 cases between the predominance of Alpha and Delta variants in Lleida region (Spain).

From: Severity of COVID-19 cases in the months of predominance of the Alpha and Delta variants

 

Adjusted odds ratio

95% CI

P-value

Gender female

1.0

Ref. group

Gender male

0.9

0.8–0.9

0.001

Age [0–14)

1.0

Ref. group

Age [15–34)

0.4

0.4–0.5

 < 0.001

Age [35–44)

0.7

0.6–0.8

 < 0.001

Age [45–54)

0.9

0.8–0.9

0.007

Age [55–64)

0.9

0.8–1.0

0.2

Age [65–74)

0.8

0.7–0.9

0.04

Age [75–84)

1.2

1.0–1.4

0.02

Age [85–)

2.7

2.2–3.2

 < 0.001

Hospitalized

1.0

0.8–1.1

0.7

ICU

1.7

1.1–2.7

0.04

Death

2.7

1.9–4.0

 < 0.001

Fever

3.7

3.4–4.0

 < 0.001

Cough

4.3

4.0–4.6

 < 0.001

Pneumonia

0.8

0.3–1.6

0.5

Sore throat

1.2

1.1–1.2

 < 0.001

Shivers

0.9

0.8–1.0

0.1

Dyspnea

1.1

1.0–1.2

0.2

Vomits

2.7

2.4–3.2

 < 0.001

Diarrhea

0.3

0.3–0.4

 < 0.001

Respiratory distress syndrome

3.0

1.6–6.3

0.001

Acute renal failure

2.9

1.4–7.3

0.03

Cardiovascular disease

1.3

1.1–1.5

0.01

Fully-vaccinated

1.0

Ref. group

Half-vaccinated

5.6

3.2–9.2

 < 0.001

None-vaccinated

35.7

25.7–51.3

 < 0.001

  1. In the logistic regression analysis, the reference category of the dependent variable (Alpha or Delta variant period) was the Delta variant period.
  2. CI Confidence Intervals, Ref. group Reference Group, ICU Intensive Care Unit, RDS Respiratory Distress Symptom.