Clinical trial NCT04533360: Prevalence of COVID-19 Antibodies Kingman AZ
Official title: Seroprevalence of SARS CoV2 Antibodies Among Adults in Kingman AZ
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Covid19
Lead sponsor: Kingman Regional Medical Center
Sponsor class: OTHER
First posted: 2020-08-31
Enrollment: 566
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Observational model: ECOLOGIC_OR_COMMUNITY
Time perspective: PROSPECTIVE
Sampling method: PROBABILITY_SAMPLE
Study population: \~30,000 individuals inhabit Kingman AZ across 7,854 households, out of which 30.1% had children under the age of 18 living with them, 54.6% were married couples living together, 10.1% had a female householder with no husband present, and 30.9% were non-families. 25.5% of all households were made up of individuals, and 11.7% had someone living alone who was 65 years of age or older.

Brief summary: The COVID-19 disease outbreak is a historic event that has challenged medical systems in the United States. Currently, most reports of confirmed cases rely on the testing of symptomatic patients. These estimates of confirmed cases miss individuals who have recovered from infection, with mild or no symptoms, and individuals with symptoms who have not been tested due to the limited availability of tests. We are conducting serology testing within the community for SARS-CoV-2-specific antibodies through a serologic test could give insight into past COVID-19 infections within our community.

Detailed description: Adult participants aged 18 or greater will be recruited from the greater Kingman AZ area through social media, radio, newspaper, and a press release. Participants self-selected inclusion in the study by calling into a COVID-19 hotline and will be included in the sample data following self-report of absence of covid-19 symptoms. Participants will be scheduled for testing on the weeks of 09/28/2020 and 10/05/2020. Upon recruitment, participants will be asked to complete a demographic and behavioral survey, assessing socioeconomic status, interpersonal interactions, personal protective measures, and COVID-19 symptomology in the preceding two months. Two months after initial testing, all negative SARS-CoV-2-specific antibodies participants will be contacted for repeat testing and surveying.

SARS-CoV-2-specific antibodies will be tested using a lateral flow immunoassay with the VITROS Anti-SARS-CoV-2 IgG test (Ortho-Clinical Diagnostics, Inc.) under the Emergency Use Authorization (EUA) from the Food and Drug Administration (FDA). The diagnostic sensitivity of the immunoassay was 87.5% and specificity was 100%. The positive and negative predictive value with a prevalence of 5% in the community was 100% and 99.3% respectively. All data will be de-identified and stored in a password protected file only visible to study investigators. All positive results were called back to participants by the lead author.

Data obtained was then used to estimate the population prevalence of SARS-CoV-2-specific antibodies in the Kingman, Arizona population. Unweighted and weighted proportions of positive tests were calculated to match the 2018 census on sex, race, education, and income. Confidence intervals for unweighted data will be estimated using exact binomial models and for weighted and adjusted estimates using bootstrap methods. All data was analyzed using SPSS.

Eligibility criteria: Inclusion Criteria:

* Adults aged 18+
* Resident of Mohave County AZ

Exclusion Criteria:

* Children under 18yo
* Previous positive SARS-CoV2- Antibody Test
* Active symptoms of respiratory Illness

Primary outcomes:
measure: Seroprevelence of SARS-CoV-2 Antibodies among Adults in Kingman AZ
timeFrame: 2-weeks
Secondary outcomes:
measure: Retention of SARS-CoV-2 Antibodies among Adults in Kingman AZ
timeFrame: 2-weeks
Other outcomes:
Locations:
city: Kingman
country: United States
facility: Kingman Regional Medical Center
state: Arizona
Study officials:
affiliation: Kingman Healthcare Inc.
name: Anthony J Santarelli, PhD
role: STUDY_DIRECTOR
References:
citation: Paul R, Arif AA, Adeyemi O, Ghosh S, Han D. Progression of COVID-19 From Urban to Rural Areas in the United States: A Spatiotemporal Analysis of Prevalence Rates. J Rural Health. 2020 Sep;36(4):591-601. doi: 10.1111/jrh.12486. Epub 2020 Jun 30.
citation: Peters DJ. Community Susceptibility and Resiliency to COVID-19 Across the Rural-Urban Continuum in the United States. J Rural Health. 2020 Jun;36(3):446-456. doi: 10.1111/jrh.12477. Epub 2020 Jun 16.
citation: Santarelli A, Lalitsasivimol D, Bartholomew N, Reid S, Reid J, Lyon C, Wells J, Ashurst J. The seroprevalence of SARS-CoV-2 in a rural southwest community. J Osteopath Med. 2021 Feb 1;121(2):199-210. doi: 10.1515/jom-2020-0287.