Frecuencia de aparición y validez predictiva de la disfunción olfatoria y del gusto en pacientes con infección por SARS-CoV-2 / Frequency and predictive validity of olfactory and taste dysfunction in patients with SARS-CoV-2 infection

Antecedentes y objetivo: La disfunción olfatoria (DO) y gustativa (DG) han demostrado ser síntomas de la infección por SARS-CoV-2. Sin embargo, su presencia en determinadas poblaciones, sobre todo en aquellas con cuadros clínicos leves, aún debe aclararse. El objetivo fue estimar la frecuencia de DO y DG, y su validez predictiva en pacientes detectados en Atención Primaria.Pacientes y métodosSe realizó un estudio transversal en el Sistema Nacional de Salud español. Se administró una encuesta epidemiológica dirigida a pacientes a los que se les solicitó la prueba PCR para SARS-CoV-2. Se estimaron las odds ratio (OR) para medir la magnitud de la asociación entre la DO y DG y la existencia de infección por SARS-CoV-2. Se calculó la sensibilidad, la especificidad y los valores predictivos positivos (VPP) y negativos (VPN) de estos síntomas en la infección por SARS-CoV-2.ResultadosSe captaron 1.038 pacientes, de los cuales el 20,1% presentaban infección por SARS-CoV-2. Las DO y DG estuvieron presentes en el 64,4% (IC 95% 56,0-72,1) y el 56,2% (IC 95% 47,9-64,2) de los sujetos con infección, respectivamente. La OR para la DO fue de 12,2 (IC 95% 8,26-18,06) y para la DG de 7,95 (IC 95% 5,48-11.53). La DG presentó una sensibilidad del 41,1% (IC 95% 34,4-46,1), una especificidad del 91,9% (IC 95% 89,8-93,7), un VPP del 56,2% (IC 95% 48,0-64,2) y un VPN de 86,1% (IC 95% 83,6-88,3), mientras que la DO mostró una sensibilidad del 45,0% (IC 95% 37,6-51,5), una especificidad del 93,7% (IC 95% 91,8-95,0), un VPP del 64,4% (IC 95% 56,0-72,1) y un VPN del 87,1% (IC 95% 84,7-89,2).ConclusionesMás de la mitad de los sujetos con infección por SARS-CoV-2 presentan DO o DG. La presencia de DO o de DG podría ser de utilidad diagnostica por su capacidad para predecir la infección en más de la mitad de las ocasiones. (AU)

Background and objective: Olfactory and taste dysfunction (OD, TD) have been considered symptoms of SARS-CoV-2 infection. However, its presence in certain populations, especially those with mild clinical symptoms, has not been clarified. The objective was to estimate the frequency of OD and TD, and its predictive validity in patients detected in Primary Care.Patients and methodsA cross-sectional study was carried out in the Spanish National Health System. An epidemiological survey was administered to patients who were requested the PCR test for SARS-CoV-2. Odds ratio (OR) were estimated to measure the magnitude of the association between OD and TD and the existence of SARS-CoV-2 infection. The sensitivity, specificity, and positive and negative predictive values (PPV, NPV) of these symptoms in SARS-CoV-2 infection were calculated.ResultsOf 1,038 patients screened, 20.1% had SARS-CoV-2 infection. OD and DG were present in 64.4% (95% CI 56.0-72.1) and 56.2% (95% CI 47.9-64.2) of the subjects with infection, respectively. The OR for OD was 12.2 (95% CI 8.26-18.06) and for TD was 7.95 (95% CI 5.48-11.53). TD presented a sensitivity of 41.1% (95% CI 34.4-46.1), a specificity of 91.9% (95% CI 89.8-93.7), a PPV of 56.2% (95% CI48.0-64.2) and a NPV of 86.1% (95% CI 83.6-88.3), while the OD showed a sensitivity of 45.0% (95% CI 37.6-51.5), a specificity of 93.7% (95% CI 91.8-95.0), a PPV of 64.4% (95% CI 56.0-72.1) and a NPV of 87.1% (95% CI 84.7-89.2).ConclusionsMore than half of the subjects with SARS-CoV-2 infection have OD or TD. The presence of OD or TD could be of diagnostic utility due to its ability to predict infection in more than half of the cases. (AU)

Frequency and predictive validity of olfactory and taste dysfunction in patients with SARS-CoV-2 infection.

BACKGROUND AND OBJECTIVE: Olfactory and taste dysfunction (OD, TD) have been considered symptoms of SARS-CoV-2 infection. However, its presence in certain populations, especially those with mild clinical symptoms, has not been clarified. The objective was to estimate the frequency of OD and TD, and its predictive validity in patients detected in Primary Care. PATIENTS AND METHODS: A cross-sectional study was carried out in the Spanish National Health System. An epidemiological survey was administered to patients who were requested the PCR test for SARS-CoV-2. Odds ratio (OR) were estimated to measure the magnitude of the association between OD and TD and the existence of SARS-CoV-2 infection. The sensitivity, specificity, and positive and negative predictive values (PPV, NPV) of these symptoms in SARS-CoV-2 infection were calculated. RESULTS: Of 1038 patients screened, 20.1% had SARS-CoV-2 infection. OD and DG were present in 64.4% (95% CI 56.0-72.1) and 56.2% (95% CI 47.9-64.2) of the subjects with infection, respectively. The OR for OD was 12.2 (95% CI 8.26-18.06) and for TD was 7.95 (95% CI 5.48-11.53). TD presented a sensitivity of 41.1% (95% CI 34.4-46.1), a specificity of 91.9% (95% CI 89.8-93.7), a PPV of 56.2% (95% CI48.0-64.2) and a NPV of 86.1% (95% CI 83.6-88.3), while the OD showed a sensitivity of 45.0% (95% CI 37.6-51.5), a specificity of 93.7% (95% CI 91.8-95.0), a PPV of 64.4% (95% CI 56.0-72.1) and a NPV of 87.1% (95% CI 84.7-89.2). CONCLUSIONS: More than half of the subjects with SARS-CoV-2 infection have OD or TD. The presence of OD or TD could be of diagnostic utility due to its ability to predict infection in more than half of the cases.

ANTECEDENTES Y OBJETIVO: La disfunción olfatoria (DO) y gustativa (DG) han demostrado ser síntomas de la infección por SARS-CoV-2. Sin embargo, su presencia en determinadas poblaciones, sobre todo en aquellas con cuadros clínicos leves, aún debe aclararse. El objetivo fue estimar la frecuencia de DO y DG, y su validez predictiva en pacientes detectados en Atención Primaria. PACIENTES Y MÉTODOS: Se realizó un estudio transversal en el Sistema Nacional de Salud español. Se administró una encuesta epidemiológica dirigida a pacientes a los que se les solicitó la prueba PCR para SARS-CoV-2. Se estimaron las odds ratio (OR) para medir la magnitud de la asociación entre la DO y DG y la existencia de infección por SARS-CoV-2. Se calculó la sensibilidad, la especificidad y los valores predictivos positivos (VPP) y negativos (VPN) de estos síntomas en la infección por SARS-CoV-2. RESULTADOS: Se captaron 1.038 pacientes, de los cuales el 20,1% presentaban infección por SARS-CoV-2. Las DO y DG estuvieron presentes en el 64,4% (IC 95% 56,0­72,1) y el 56,2% (IC 95% 47,9­64,2) de los sujetos con infección, respectivamente. La OR para la DO fue de 12,2 (IC 95% 8,26−18,06) y para la DG de 7,95 (IC 95% 5,48−11.53). La DG presentó una sensibilidad del 41,1% (IC 95% 34,4­46,1), una especificidad del 91,9% (IC 95% 89,8­93,7), un VPP del 56,2% (IC 95% 48,0­64,2) y un VPN de 86,1% (IC 95% 83,6­88,3), mientras que la DO mostró una sensibilidad del 45,0% (IC 95% 37,6­51,5), una especificidad del 93,7% (IC 95% 91,8­95,0), un VPP del 64,4% (IC 95% 56,0­72,1) y un VPN del 87,1% (IC 95% 84,7­89,2). CONCLUSIONES: Más de la mitad de los sujetos con infección por SARS-CoV-2 presentan DO o DG. La presencia de DO o de DG podría ser de utilidad diagnostica por su capacidad para predecir la infección en más de la mitad de las ocasiones.

[Frequency and predictive validity of olfactory and taste dysfunction in patients with SARS-CoV-2 infection]. / Frecuencia de aparición y validez predictiva de la disfunción olfatoria y del gusto en pacientes con infección por SARS-CoV-2.

BACKGROUND AND OBJECTIVE: Olfactory and taste dysfunction (OD, TD) have been considered symptoms of SARS-CoV-2 infection. However, its presence in certain populations, especially those with mild clinical symptoms, has not been clarified. The objective was to estimate the frequency of OD and TD, and its predictive validity in patients detected in Primary Care. PATIENTS AND METHODS: A cross-sectional study was carried out in the Spanish National Health System. An epidemiological survey was administered to patients who were requested the PCR test for SARS-CoV-2. Odds ratio (OR) were estimated to measure the magnitude of the association between OD and TD and the existence of SARS-CoV-2 infection. The sensitivity, specificity, and positive and negative predictive values (PPV, NPV) of these symptoms in SARS-CoV-2 infection were calculated. RESULTS: Of 1,038 patients screened, 20.1% had SARS-CoV-2 infection. OD and DG were present in 64.4% (95% CI 56.0-72.1) and 56.2% (95% CI 47.9-64.2) of the subjects with infection, respectively. The OR for OD was 12.2 (95% CI 8.26-18.06) and for TD was 7.95 (95% CI 5.48-11.53). TD presented a sensitivity of 41.1% (95% CI 34.4-46.1), a specificity of 91.9% (95% CI 89.8-93.7), a PPV of 56.2% (95% CI48.0-64.2) and a NPV of 86.1% (95% CI 83.6-88.3), while the OD showed a sensitivity of 45.0% (95% CI 37.6-51.5), a specificity of 93.7% (95% CI 91.8-95.0), a PPV of 64.4% (95% CI 56.0-72.1) and a NPV of 87.1% (95% CI 84.7-89.2). CONCLUSIONS: More than half of the subjects with SARS-CoV-2 infection have OD or TD. The presence of OD or TD could be of diagnostic utility due to its ability to predict infection in more than half of the cases.

Características clínico-epidemiológicas de la infección por el virus SARS-CoV-2 en médicos de familia: un estudio de casos y controles / Clinical and epidemiological characteristics of SARS-CoV-2 infections in family physicians: A case-control study

Objetivo: Identificar las características sociodemográficas, clínicas y epidemiológicas asociadas a la presencia de infección por el virus SARS-CoV-2 en médicos de familia que desempeñan su actividad laboral en atención primaria (AP) o en urgencias de hospital. Diseño: Estudio observacional analítico de casos y controles. Emplazamiento: Atención primaria. Participantes: Un total de 969 médicos de AP, urgencias hospitalarias y otros centros extrahospitalarios que dispusieran de RT-PCR para la detección del virus SARS-CoV-2. De estos, 133 participaron como casos (PCR positiva) y 836 como controles (PCR negativa).Intervenciones: No. Mediciones principales: Variables sociodemográficas y laborales, contacto con enfermo de COVID-19, síntomas presentes durante el proceso, primer síntoma manifestado, enfermedades crónicas previas y consumo de tabaco. Resultados: Del total de la muestra el 13,7% (IC 95%: 11,6-16,0), eran casos infectados con el SARS-CoV-2. Los síntomas declarados más frecuentemente por los infectados fueron sensación de fatiga/cansancio (69,2%; IC 95%: 60,9-77,4%), tos (56,4%; IC 95%: 47,6-65,2%) y cefalea (55,6%; IC 95%: 46,8-64,4%). Mediante regresión logística, las variables asociadas de manera independiente con la infección por virus SARS-CoV-2 en médicos de familia fueron: contacto previo con enfermo COVID-19 (OR: 2,3; IC 95%: 1,2-4,2), presentar fatiga/cansancio (OR: 2,2; IC 95%: 1,2-3,9), alteración del olfato (4,6; IC 95%: 1,7-12,5), alteración del gusto (OR: 32,0; IC 95%: 9,6-106,8), tos (OR: 3,0; IC 95%: 1,7-5,3) y fiebre (OR: 6,1; IC 95%: 3,2-11,4). Conclusiones: Los síntomas relacionados de forma independiente con la infección por el virus SARS-CoV-2 en médicos de familia fueron la fatiga, la fiebre, la tos y la alteración del gusto y del olfato. La presencia de estos síntomas podría facilitar el diagnóstico de sospecha de enfermedad COVID-19 y la selección más precoz de aquellos que precisan pruebas de confirmación.(AU)

Objective: To identify the sociodemographic, clinical and epidemiological characteristics associated with the presence of infection by the SARS-CoV-2 virus in family physicians who carry out their work in Primary Care (PC) or in Hospital Emergencies. Desing: Observational analytical case-control study. Site: Primary care. Participants: 969 Primare Care Physicians, Hospital Emergency physicians and other extrahospitalry centers that had PCR for the detection of the SARS-CoV-2. Of these, 133 participated as cases (PCR positive) and 836 as controls (PCR negative). Interventions: No. Main measurements: Sociodemographic and work, contact with a COVID-19 patient, symptoms present during the process, first manifested symptom, previous chronic pathologies, and tobacco use. Results: 13.7% (95% CI: 11.6-16.0) were cases infected with SARS-CoV-2. The most frequently declared symptoms by those infected were a feeling of fatigue/tiredness (69.2%; 95% CI: 60.9-77.4%), cough (56.4%; 95% CI: 47.6-65.2%) and headache (55.6%; 95% CI: 46.8-64.4%).Using logistic regression, the variables independently associated with SARS-CoV-2 virus infection in Family Physicians were: previous contact with a COVID-19 patient (OR: 2.3; 95% CI: 1.2-4.2), present fatigue / tiredness (OR: 2.2; 95% CI: 1.2-3.9), smell alteration (4.6; 95% CI: 1.7-12.5), taste alteration (OR: 32.0; 95% CI: 9.6-106.8), cough (OR: 3.0; 95% CI: 1.7-5.3) and fever (OR: 6.1; 95% CI: 3.2-11.4). Conclusions: Symptoms independently related to SARS-CoV-2 virus infection in Family Physicians were fatigue, fever, cough, and altered taste and smell. The presence of these symptoms could facilitate the diagnosis of suspected COVID-19 disease and the earlier selection of those that require confirmatory tests.(AU)

[Clinical and epidemiological characteristics of SARS-CoV-2 infections in family physicians: A case-control study]. / Características clínico-epidemiológicas de la infección por el virus SARS-CoV-2 en médicos de familia: un estudio de casos y controles.

OBJECTIVE: To identify the sociodemographic, clinical and epidemiological characteristics associated with the presence of infection by the SARS-CoV-2 virus in family physicians who carry out their work in Primary Care (PC) or in Hospital Emergencies. DESING: Observational analytical case-control study. SITE: Primary care. PARTICIPANTS: 969 Primare Care Physicians, Hospital Emergency physicians and other extrahospitalry centers that had PCR for the detection of the SARS-CoV-2. Of these, 133 participated as cases (PCR positive) and 836 as controls (PCR negative). INTERVENTIONS: No. MAIN MEASUREMENTS: Sociodemographic and work, contact with a COVID-19 patient, symptoms present during the process, first manifested symptom, previous chronic pathologies, and tobacco use. RESULTS: 13.7% (95% CI: 11.6-16.0) were cases infected with SARS-CoV-2. The most frequently declared symptoms by those infected were a feeling of fatigue/tiredness (69.2%; 95% CI: 60.9-77.4%), cough (56.4%; 95% CI: 47.6-65.2%) and headache (55.6%; 95% CI: 46.8-64.4%).Using logistic regression, the variables independently associated with SARS-CoV-2 virus infection in Family Physicians were: previous contact with a COVID-19 patient (OR: 2.3; 95% CI: 1.2-4.2), present fatigue / tiredness (OR: 2.2; 95% CI: 1.2-3.9), smell alteration (4.6; 95% CI: 1.7-12.5), taste alteration (OR: 32.0; 95% CI: 9.6-106.8), cough (OR: 3.0; 95% CI: 1.7-5.3) and fever (OR: 6.1; 95% CI: 3.2-11.4). CONCLUSIONS: Symptoms independently related to SARS-CoV-2 virus infection in Family Physicians were fatigue, fever, cough, and altered taste and smell. The presence of these symptoms could facilitate the diagnosis of suspected COVID-19 disease and the earlier selection of those that require confirmatory tests.