Clinical trial NCT04406038: Study of the Spread of COVID-19 in Saint Petersburg, Russia
Official title: A Population-Based Seroprevalence of SARS-CoV-2-Specific Antibodies Among Adults in Saint Petersburg, Russia: Longitudinal Cohort Study
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: COVID19
Keywords: seroprevalence
covid-19
sars-cov-2
Lead sponsor: European University at St. Petersburg
Sponsor class: OTHER
First posted: 2020-05-28
Enrollment: 1038
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: COHORT
Time perspective: PROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: Representative sample of the population of Saint Petersburg, Russia

Brief summary: Seroprevalence study of COVID-19 in Saint Petersburg, Russia is a regional longitudinal cohort study aiming to evaluate the spread dynamics of the COVID-19 disease in the population of Saint Petersburg. Clinically asymptomatic adults are sampled from the population using random digit dialing and tested for the presence of SARS-CoV-2-specific antibodies in the blood serum. Data collection and serial sampling of the same individuals spans four weeks and is conducted every two weeks in order to understand both the spread of the virus in the population.

Detailed description: At least 1 000 individuals, 18 years old and older, are randomly sampled using random digit dialing from the population of Saint Petersburg, Russia. Random sampling is performed by a survey company on the list of mobile phone numbers with designated geography prefixes of St. Petersburg. The baseline questionnaire for computer-assisted telephone interview includes travel history, medical history, and socio-economic status of the respondents. Sampled individuals are then invited to the clinic for blood sampling, their refusal to participate is recorded. Collected blood samples are used for SARS-CoV-2-specific antibodies testing. Data and sample collection spans four weeks and is conducted every two weeks. Participants complete additional questionnaires in the clinic providing information on medical history, history of allergies, chronic disease, smoking, and medication taken regularly. Contact tracing data and environmental conditions of the household are reсorded.

Eligibility criteria: Inclusion Criteria:

* Individuals sampled from the population of Saint Petersburg, Russia using random digit dialling.
* Subjects aged 18 and older of both genders.
* Asymptomatic at the time of blood draw.
* Written informed consent for a blood draw, SARS-COV-2 antibody test, and data collection.

Exclusion Criteria:

* Presence of fever or cough or respiratory distress at the time of blood test not attributable to other known chronic disease.
* Age under 18.
* Any health condition that may be a contraindication towards blood sampling in out-patient clinic.
* Residence in Kolpinskiy, Kurortniy, Krasnoselsky, Kronshtadtskiy, Petrodvorcoviy, Pushkinskiy districts of St. Petersburg.

Primary outcomes:
measure: Prevalence of the SARS-COV-2 infection in Saint Petersburg, Russia
timeFrame: Measured with two-week (14 days) intervals
Secondary outcomes:
measure: Prevalence odds ratios
timeFrame: Measured with two-week (14 days) intervals
measure: Immune response dynamics
timeFrame: Measured with two-week (14 days) intervals
Other outcomes:
Locations:
city: Saint Petersburg
country: Russian Federation
facility: Clinic "Scandinavia"
Study officials:
affiliation: Clinic "Scandinavia"
name: Lubov Barabanova, MD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Barchuk A, Shirokov D, Sergeeva M, Tursun Zade R, Dudkina O, Tychkova V, Barabanova L, Skougarevskiy D, Danilenko D. Evaluation of the performance of SARS--CoV--2 antibody assays for a longitudinal population-based study of COVID--19 spread in St. Petersburg, Russia. J Med Virol. 2021 Oct;93(10):5846-5852. doi: 10.1002/jmv.27126. Epub 2021 Jun 12.
citation: Barchuk A, Bulina A, Cherkashin M, Berezina N, Rakova T, Kuplevatskaya D, Stanevich O, Skougarevskiy D, Okhotin A. COVID-19 vaccines effectiveness against symptomatic SARS-CoV-2 during Delta variant surge: a preliminary assessment from a case-control study in St. Petersburg, Russia. BMC Public Health. 2022 Sep 22;22(1):1803. doi: 10.1186/s12889-022-14202-9.
citation: Barchuk A, Cherkashin M, Bulina A, Berezina N, Rakova T, Kuplevatskaya D, Stanevich O, Skougarevskiy D, Okhotin A. Vaccine effectiveness against referral to hospital after SARS-CoV-2 infection in St. Petersburg, Russia, during the Delta variant surge: a test-negative case-control study. BMC Med. 2022 Sep 20;20(1):312. doi: 10.1186/s12916-022-02509-8.
citation: Barchuk A, Bulina A, Cherkashin M, Berezina N, Rakova T, Kuplevatskaya D, Skougarevskiy D, Okhotin A. Gam-COVID-Vac, EpiVacCorona, and CoviVac effectiveness against lung injury during Delta and Omicron variant surges in St. Petersburg, Russia: a test-negative case-control study. Respir Res. 2022 Oct 10;23(1):276. doi: 10.1186/s12931-022-02206-3.
citation: Barchuk A, Skougarevskiy D, Titaev K, Shirokov D, Raskina Y, Novkunkskaya A, Talantov P, Isaev A, Pomerantseva E, Zhikrivetskaya S, Barabanova L, Volkov V. Seroprevalence of SARS-CoV-2 antibodies in Saint Petersburg, Russia: a population-based study. Sci Rep. 2021 Jun 21;11(1):12930. doi: 10.1038/s41598-021-92206-y.
citation: Barchuk A, Skougarevskiy D, Kouprianov A, Shirokov D, Dudkina O, Tursun-Zade R, Sergeeva M, Tychkova V, Komissarov A, Zheltukhina A, Lioznov D, Isaev A, Pomerantseva E, Zhikrivetskaya S, Sofronova Y, Blagodatskikh K, Titaev K, Barabanova L, Danilenko D. COVID-19 pandemic in Saint Petersburg, Russia: Combining population-based serological study and surveillance data. PLoS One. 2022 Jun 15;17(6):e0266945. doi: 10.1371/journal.pone.0266945. eCollection 2022.