14% of Maryland nursing care residents who died from COVID-19
were asymptomatic at initial testing


A large-cohort nursing home study during the COVID-19 pandemic evaluated the outcomes of 1,970 residents from 15 nursing home facilities with universal testing in Maryland.

The study used descriptive statistics to compare baseline characteristics, logistic regression to assess the association of comorbidities with COVID-19, and Cox regression to assess the association of asymptomatic and symptomatic COVID-19 with mortality and hospitalization. The study also assessed the association of comorbidities with mortality and hospitalization risk and symptom status was assessed at the time of the first test with a maximum follow-up of 94 days.

The study concluded:

  • Asymptomatic infection has profound implications in this population as there was a higher risk of death, but not hospitalization
  • More than half of the cases detected were asymptomatic at testing, which is consistent with other early reports in this setting
  • Residents who are asymptomatic, and test positive, have up to 2 times the mortality risk of residents who test negative for SARS-CoV-2

At a Glance

Study included one of the largest cohort of nursing homes residents with individual-level data
There were 242 deaths among the 1,970 residents over the 94-day follow-up period
14 %
14% of individuals who died were asymptomatic but tested positive
Source: Tang, O & Bigelow, BF et al. "Outcomes of Nursing Home COVID-19 Patients by Initial Symptoms and Comorbidity: Results of Universal Testing of 1970 Residents." December 2020. Journal of the American Medical Directors Association. https://www.jamda.com/article/S1525-8610(20)30887-2/fulltext 

Disclaimer: Scientific articles are presented for educational purposes only and are not intended to promote any Beckman Coulter product or service.  Opinions and conclusions are those of the respective authors and not Beckman Coulter.