Course: Mortality Among US Patients Hospitalized With SARS-CoV-2 Infection in 2020
CME Credits: 1.00
Released: 2021-04-08
Key Points
Question What trends for in-hospital mortality by age among hospitalized patients with SARS-CoV-2–positive tests are evident between March 1 and November 21, 2020?Findings This cohort study of 503,409 patients from 209 US acute care hospitals found a decrease in in-hospital mortality among patients with SARS-CoV-2–positive tests. Mortality rates were 10.6% in March, increased to 19.7% in April, and decreased to 9.3% in November.
Meaning This large study supported findings of smaller, regional studies that reported in-hospital mortality decreased for all age groups during the pandemic period and suggests that this decrease cannot be solely attributed to hospital admission of increased proportions of younger patients.
Abstract
Importance Mortality is an important measure of the severity of a pandemic. This study aimed to understand how mortality by age of hospitalized patients who were tested for SARS-CoV-2 has changed over time.Objective To evaluate trends in in-hospital mortality among patients who tested positive for SARS-CoV-2.
Design, Setting, and Participants This retrospective cohort study included patients who were hospitalized for at least 1 day at 1 of 209 US acute care hospitals of variable size, in urban and rural areas, between March 1 and November 21, 2020. Eligible patients had a SARS-CoV-2 polymerase chain reaction (PCR) or antigen test within 7 days of admission or during hospitalization, and a record of discharge or in-hospital death.
Exposure SARS-CoV-2 positivity.
Main Outcomes and Measures SARS-CoV-2 infection was defined as a positive SARS-CoV-2 PCR or antigen test within 7 days before admission or during hospitalization. Mortality was extracted from electronically available data.
Results Among 503,409 admitted patients, 42,604 (8.5%) had SARS-CoV-2–positive tests. Of those with SARS-CoV-2–positive tests, 21,592 (50.7%) were male patients. Hospital admissions among patients with SARS-CoV-2–positive tests were highest in the group aged 65 years or older (19,929 [46.8%]), followed by those aged 50 to 64 years (11,602 [27.2%]) and 18 to 49 years (10,619 [24.9%]). Hospital admissions among patients 18 to 49 years of age increased from 1099 of 5319 (20.7%) in April to 1266 of 4184 (30.3%) in June and 2156 of 7280 (29.6%) in July, briefly exceeding those in the group 50 to 64 years of age (June: 1194 of 4184 [28.5%]; 2039 of 7280 [28.0%]). Patients with SARS-CoV-2–positive tests had higher in-hospital mortality than patients with SARS-CoV-2–negative tests (4705 [11.0%] vs 11,707 of 460,805 [2.5%]; P?<?.001). In-hospital mortality rates increased with increasing age for both patients with SARS-CoV-2–negative tests and SARS-CoV-2–positive tests. In patients with SARS-CoV-2–negative tests, mortality increased from 45 of 11,255 (0.4%) in those younger than 18 years to 4812 of 107,394 (4.5%) in those older than 75 years. In patients with SARS-CoV-2–positive tests, mortality increased from 1 of 454 (0.2%) of those younger than 18 years to 2149 of 10,287 (20.9%) in those older than 75 years. In-hospital mortality rates among patients with SARS-CoV-2–negative tests were similar for male and female patients (6273 of 209,086 [3.0%] vs 5538 of 251,719 [2.2%]) but higher mortality was observed among male patients with SARS-CoV-2–positive tests (2700 of 21,592 [12.5%]) compared with female patients with SARS-CoV-2–positive tests (2016 of 21,012 [9.60%]). Overall, in-hospital mortality increased from March to April (63 of 597 [10.6%] to 1047 of 5319 [19.7%]), then decreased significantly to November (499 of 5350 [9.3%]; P?=?.04), with significant decreases in the oldest age groups (50-64 years: 197 of 1542 [12.8%] to 73 of 1341 [5.4%]; P?=?.02; 65-75 years: 269 of 1182 [22.8%] to 137 of 1332 [10.3%]; P?=?.006; >75 years: 535 of 1479 [36.2%] to 262 of 1505 [17.4%]; P?=?.03).
Conclusions and Relevance This nationally representative study supported the findings of smaller, regional studies and found that in-hospital mortality declined across all age groups during the period evaluated. Reductions were unlikely because of a higher proportion of younger patients with lower in-hospital mortality in the later period.
Educational Objective
To identify the key insights or developments described in this article
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