BACKGROUND.Many studies have succeeded in identifying a subset of children with febrile neutropenia (FN) who are at lower risk of infectious complications and eventual death. Conversely, to the authors' knowledge, no scoring system has been published to date with which to assess the risk of mortality for the whole group of children with neutropenia and fever.METHODS.Between March 2000 and July 2004, 1520 episodes of FN in 981 children were included in a multicentric prospective study to evaluate a scoring system that was designed to identify high mortality risk at the onset of an FN episode in children with cancer.RESULTS.In the derivation set (714 episodes), 18 patients died (2.5%). A multivariate analysis yielded the following significant mortality‐related risk factors: advanced stage of underlying malignant disease (odds ratio [OR], 3122.1; 95% confidence interval [95% CI], 0.0001–5.2), associated comorbidity (OR, 25.3; 95% CI, 7.7–83.2), and bacteremia (OR, 7.2; 95% CI, 2.4–22.0). A mortality score could be built with 3 points scored for the presence of advanced‐stage underlying malignant disease, 2 points scored for the presence of associated comorbidity, and 1 point scored for bacteremia. If patients collected 4 points of the risk score at onset, then their risk of mortality was 5.8%; if patients had a score of 5 points, then their risk of mortality was 15.4%; and, if they reached the maximum score of 6 points, then their risk of mortality was raised to 40%. The sensitivity of the scoring system was 100%, and it had a specificity of 84.2%. In the validation set (806 episodes), 19 children died (2.3%). For children with scores >3, the scoring system had a sensitivity of 84.2%, a specificity of 83.2%, and a negative predictive value of 99.54% for predicting mortality.CONCLUSIONS.The use of a mortality score for high‐risk patients was validated statistically by the current results. This is a major prognostic approach to categorize patients with high‐risk FN at onset. A better initial predictive approach may allow better therapeutic decisions for these children, with an eventual impact on reducing mortality. Cancer 2007. © 2007 American Cancer Society.

Highest rates of MD were observed among young infants. This study provides baseline data to estimate the impact of introducing meningococcal vaccines in Argentina.

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BackgroundLimited data is available from low-middle and upper-middle income countries of the factors associated with hospitalization or admission to pediatric intensive care unit (PICU) for children with COVID-19.ObjectiveTo describe the factors associated with hospitalization or PICU admission of children with COVID-19 in Latin America.MethodMulticenter, analytical, retrospective study of children reported from 10 different Latin American countries to the Latin-American Society of Pediatric Infectious Diseases (SLIPE-COVID) research network from June 1, 2020, and February 28, 2021. Outpatient or hospitalized children <18 years of age with COVID-19 confirmed by polymerase chain reaction or antigen detection from the nasopharynx were included. Children with multisystem inflammatory syndrome in children (MIS-C) were excluded. Associations were assessed using univariate and multivariable logistic regression models.ResultsA total of 1063 children with COVID-19 were included; 500 (47%) hospitalized, with 419 (84%) to the pediatric wards and 81 (16%) to the ICU. In multivariable analyses, age <1 year (Odds Ratio [OR] 1.78; 95% CI 1.08–2.94), native race (OR 5.40; 95% CI 2.13–13.69) and having a co-morbid condition (OR 5.3; 95% CI 3.10–9.15), were associated with hospitalization. Children with metabolic or endocrine disorders (OR 4.22; 95% CI 1.76–10.11), immune deficiency (1.91; 95% CI 1.05–3.49), preterm birth (OR 2.52; 95% CI 1.41–4.49), anemia at presentation (OR 2.34; 95% CI 1.28–4.27), radiological peribronchial wall thickening (OR 2.59; 95% CI 1.15–5.84) and hypoxia, altered mental status, seizures, or shock were more likely to require PICU admission. The presence of pharyngitis (OR 0.34; 95% CI 0.25–0.48); myalgia (OR 0.47; 95% CI 0.28–0.79) or diarrhea (OR 0.38; 95% CI 0.21–0.67) were inversely associated with hospital admission.ConclusionsIn this data analysis reported to the SLIPE research network in Latin America, infants, social inequalities, comorbidities, anemia, bronchial wall thickening and specific clinical findings on presentation were associated with higher rates of hospitalization or PICU admission. This evidence provides data for prioritization prevention and treatment strategies for children suffering from COVID-19.

Background: Information on the impact of the different variants in children in Latin America is scarce. The objective of this study was to describe epidemiologic and clinical features of COVID-19 infection in children under 18 years of age in Argentina, comparing the periods before and after the circulation of new variants. Methods: Observational, cross-sectional, multicentric, analytical study. All patients under 18 years of age with confirmed SARS-CoV-2 infection admitted at 22 healthcare centers were included. Two study periods were established: Period 1 (EW10-2020 to EW12-2021) for the Wuhan strain; Period 2 (EW13 to EW35 2021) for Alpha, Gamma, Delta and Lambda variants. Findings: A total of 6330 confirmed cases were included. Period 1: 3575 (56.5%), period 2: 2755 (43.5%). During period 2, a lower number of asymptomatic cases was observed, while general, respiratory and neurologic signs and symptoms increased in all age groups. Oxygen therapy requirement was higher during the first period (36.7% vs 19.1%; P < 0.001). No significant differences were observed in the rates of severe or critical cases (6.3% vs 5,4%; P = 0.102), intensive care admission (2.1% vs 2%; P < 0.656) or case fatality (0.3% vs 0.5 %; P < 0.229). MIS-C cases occurred more frequently during the first period (1.9% vs 1.1%; P = 0.009) Interpretation: The clinical spectrum of COVID-19 in Argentina has evolved. With the emergence of new variants, although the number of asymptomatic cases declined, numbers of severe and critical cases, as well as case fatality rates in children, remained unchanged.