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Alves-Cabratosa L, Comas-Cufí M, Blanch J, Martí-Lluch R, Ponjoan A, Castro-Guardiola A, Hurtado-Ganoza A, Pérez-Jaén A, Rexach-Fumaña M, Faixedas-Brunsoms D, Gispert-Ametller MA, Guell-Cargol A, Rodriguez-Batista M, Santaularia-Font F, Orriols R, Bonnin-Vilaplana M, Calderón López JC, Sabater-Talaverano G, Queralt Moles FX, Rodriguez-Requejo S, Avellana-Revuelta E, Balló E, Fages-Masmiquel E, Sirvent JM, Lorencio C, Morales-Pedrosa JM, Ortiz-Ballujera P, Ramos R. Individuals With SARS-CoV-2 Infection During the First and Second Waves in Catalonia, Spain: Retrospective Observational Study Using Daily Updated Data. JMIR Public Health Surveill 2022; 8:e30006. [PMID: 34797774 PMCID: PMC8734611 DOI: 10.2196/30006] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 11/16/2021] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND A description of individuals with SARS-CoV-2 infection comparing the first and second waves could help adapt health services to manage this highly transmissible infection. OBJECTIVE We aimed to describe the epidemiology of individuals with suspected SARS-CoV-2 infection, and the characteristics of patients with a positive test comparing the first and second waves in Catalonia, Spain. METHODS This study had 2 stages. First, we analyzed daily updated data on SARS-CoV-2 infection in individuals from Girona (Catalonia). Second, we compared 2 retrospective cohorts of patients with a positive reverse-transcription polymerase chain reaction or rapid antigen test for SARS-CoV-2. The severity of patients with a positive test was defined by their admission to hospital, admission to intermediate respiratory care, admission to the intensive care unit, or death. The first wave was from March 1, 2020, to June 24, 2020, and the second wave was from June 25, 2020, to December 8, 2020. RESULTS The numbers of tests and cases were lower in the first wave than in the second wave (26,096 tests and 3140 cases in the first wave versus 140,332 tests and 11,800 cases in the second wave), but the percentage of positive results was higher in the first wave than in the second wave (12.0% versus 8.4%). Among individuals with a positive diagnostic test, 818 needed hospitalization in the first wave and 680 in the second; however, the percentage of hospitalized individuals was higher in the first wave than in the second wave (26.1% versus 5.8%). The group that was not admitted to hospital included older people and those with a higher percentage of comorbidities in the first wave, whereas the characteristics of the groups admitted to hospital were more alike. CONCLUSIONS Screening systems for SARS-CoV-2 infection were scarce during the first wave, but were more adequate during the second wave, reflecting the usefulness of surveillance systems to detect a high number of asymptomatic infected individuals and their contacts, to help control this pandemic. The characteristics of individuals with SARS-CoV-2 infection in the first and second waves differed substantially; individuals in the first wave were older and had a worse health condition.
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Affiliation(s)
- Lia Alves-Cabratosa
- Vascular Health Research Group of Girona, Institut Universitari per a la Recerca en Atenció Primària Jordi Gol i Gurina, Girona, Spain
| | - Marc Comas-Cufí
- Vascular Health Research Group of Girona, Institut Universitari per a la Recerca en Atenció Primària Jordi Gol i Gurina, Girona, Spain
| | - Jordi Blanch
- Vascular Health Research Group of Girona, Institut Universitari per a la Recerca en Atenció Primària Jordi Gol i Gurina, Girona, Spain
| | - Ruth Martí-Lluch
- Vascular Health Research Group of Girona, Institut Universitari per a la Recerca en Atenció Primària Jordi Gol i Gurina, Girona, Spain
- Institut d'Investigació Biomèdica de Girona, Girona, Spain
| | - Anna Ponjoan
- Vascular Health Research Group of Girona, Institut Universitari per a la Recerca en Atenció Primària Jordi Gol i Gurina, Girona, Spain
- Institut d'Investigació Biomèdica de Girona, Girona, Spain
| | - Antoni Castro-Guardiola
- Institut d'Investigació Biomèdica de Girona, Girona, Spain
- Internal Medicine Department, Hospital Universitari de Girona Doctor Josep Trueta, Girona, Spain
- Department of Medical Sciences, University of Girona, Girona, Spain
| | - Abelardo Hurtado-Ganoza
- Institut d'Investigació Biomèdica de Girona, Girona, Spain
- Internal Medicine Department, Hospital Universitari de Girona Doctor Josep Trueta, Girona, Spain
| | - Ana Pérez-Jaén
- Internal Medicine Department, Hospital Universitari de Girona Doctor Josep Trueta, Girona, Spain
| | - Maria Rexach-Fumaña
- Institut d'Investigació Biomèdica de Girona, Girona, Spain
- Internal Medicine Department, Hospital Universitari de Girona Doctor Josep Trueta, Girona, Spain
| | - Delfi Faixedas-Brunsoms
- Technical Secretariat, Institut Assistència Sanitària, Girona, Spain
- Technical Secretariat, Hospital Universitari de Girona Doctor Josep Trueta, Girona, Spain
| | - Maria Angels Gispert-Ametller
- Department of Medical Sciences, University of Girona, Girona, Spain
- Emergency Department, Hospital Universitari de Girona Doctor Josep Trueta, Girona, Spain
| | - Anna Guell-Cargol
- Emergency Department, Hospital Universitari de Girona Doctor Josep Trueta, Girona, Spain
| | | | | | - Ramon Orriols
- Institut d'Investigació Biomèdica de Girona, Girona, Spain
- Department of Medical Sciences, University of Girona, Girona, Spain
- Pneumology Department, Hospital Universitari de Girona Doctor Josep Trueta, Girona, Spain
- Pneumology Department, Hospital Santa Caterina de Salt, Salt, Spain
- CIBER of Respiratory Diseases, Barcelona, Spain
| | - Marc Bonnin-Vilaplana
- Institut d'Investigació Biomèdica de Girona, Girona, Spain
- Department of Medical Sciences, University of Girona, Girona, Spain
- Pneumology Department, Hospital Universitari de Girona Doctor Josep Trueta, Girona, Spain
- Pneumology Department, Hospital Santa Caterina de Salt, Salt, Spain
| | - Juan Carlos Calderón López
- Institut d'Investigació Biomèdica de Girona, Girona, Spain
- Department of Medical Sciences, University of Girona, Girona, Spain
- Pneumology Department, Hospital Universitari de Girona Doctor Josep Trueta, Girona, Spain
- Pneumology Department, Hospital Santa Caterina de Salt, Salt, Spain
| | - Gladis Sabater-Talaverano
- Institut d'Investigació Biomèdica de Girona, Girona, Spain
- Department of Medical Sciences, University of Girona, Girona, Spain
- Pneumology Department, Hospital Universitari de Girona Doctor Josep Trueta, Girona, Spain
- Pneumology Department, Hospital Santa Caterina de Salt, Salt, Spain
| | | | - Sara Rodriguez-Requejo
- Atenció Primària, Institut Català de la Salut, Girona, Spain
- Atenció Primària, Institut d'Assistència Sanitària, Girona, Spain
| | - Esteve Avellana-Revuelta
- Atenció Primària, Institut Català de la Salut, Girona, Spain
- Atenció Primària, Institut d'Assistència Sanitària, Girona, Spain
| | - Elisabet Balló
- Department of Medical Sciences, University of Girona, Girona, Spain
- Atenció Primària, Institut Català de la Salut, Girona, Spain
| | | | - Josep-Maria Sirvent
- Intensive Care Department, Hospital Universitari de Girona Doctor Josep Trueta, Girona, Spain
| | - Carol Lorencio
- Intensive Care Department, Hospital Universitari de Girona Doctor Josep Trueta, Girona, Spain
| | | | | | - Rafel Ramos
- Vascular Health Research Group of Girona, Institut Universitari per a la Recerca en Atenció Primària Jordi Gol i Gurina, Girona, Spain
- Institut d'Investigació Biomèdica de Girona, Girona, Spain
- Department of Medical Sciences, University of Girona, Girona, Spain
- Atenció Primària, Institut Català de la Salut, Girona, Spain
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