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European CF Society Neonatal Screening Working Group (ECFS NSWG): Sabine Renner , Max Zeyda , Elke de Wachter , Luc Regal , Felix Votava, Andrea Holubova, Marianne Skov , Tessa Morgan, Paul Bregeaut , Loretta O'Grady, Ines Bucci , Stefano Pantano , Simonetta Simonetti, Domenica De Venuto, Donatello Salvatore, Nicola Perrotti, Mimma Caloiero, Giuseppe Castaldo, Antonella Tosco, Francesca Righetti, Giovanna Pisi, Fiorella Battistini, Antonio Angeloni, Giuseppe Cimino, Giovanni Fiocchi, Antonella Angiolillo, Michela Cassanello, Luisella Alberti, Laura E Claut, Raffaele Badolato, Enza Pavanello, Benedetta Fabrizzi, Elisabetta Bignamini, Anna Cardillo, Mariangela Lombardo, Letizia Cocciadiferro, Lisa Termini, Daniela Dolce, Vito Terlizzi, Anna Tamanini, Francesca Pauro, Giancarlo la Marca, Elina Aleksejeva, Dita Gaidule-Logina, Stoika Fustik, Violeta Anastasovska, Marelle Bouva, Alastair Reid, Jennifer Cundick, Emma Lundman, Egil Bakkeheim, Katarzyna Zybert, Mariusz Oltarzewski, Laura Vilarinho, Victoria Sherman, Elena Kondratyeva, Sarah Smith, Gordana Vilotijevic Dautovic, Maria Knapkova, Zuzana Mydlova, Rosa Mª López, Valle Velasco, Felicitas Díaz Flores, Cristóbal Colón Mejeras, Eva Sl Pedersen, Ugur Ozcelik, Bulent Karadag, Halyna Makukh, Moat Stuart. European CF Society Neonatal Screening Working Group (ECFS NSWG): INSA - Laura Vilarinho Background: The aim of this study was to record the current status of newborn bloodspot screening (NBS) for CF across Europe and assess performance. Methods: Survey of representatives of NBS for CF programmes across Europe. Performance was assessed through a framework developed in a previous exercise. Results: In 2022, we identified 22 national and 34 regional programmes in Europe. Barriers to establishing NBS included cost and political inertia. Performance was assessed from 2019 data reported by 21 national and 21 regional programmes. All programmes employed different protocols, with IRT-DNA the most common strategy. Six national and 11 regional programmes did not use DNA analysis. Conclusions: Integrating DNA analysis into the NBS protocol improves PPV, but at the expense of increased carrier and CFSPID recognition. Some programmes employ strategies to mitigate these outcomes. Programmes should constantly strive to improve performance but large datasets are needed to assess outcomes reliably. Highlights: In 2022, newborn bloodspot screening (NBS) for CF is undertaken in 30 European countries, 26 of them are national programmes; Some programmes are still not achieving ECFS standards. Compared to 2014, there is an improvement in sensitivity but a deterioration in achieving a sufficient PPV; There continues to be a wide variety of approaches, but the majority of national programmes are now using DNA analysis as a 2nd tier; This survey demonstrates areas of good practice, but there is considerable scope for improvement in the quality of NBS for CF across Europe; The framework of the 20 parameters to calculate the 8 key outcomes should be part of any annual report of a CF NBS programme, and thus improve future surveys. The survey was funded by the European CF Society info:eu-repo/semantics/publishedVersion

[Background] Children's diffuse lung disease, also known as children's Interstitial Lung Diseases (chILD), are a heterogeneous group of rare diseases with relevant morbidity and mortality, which diagnosis and classification are very complex. Epidemiological data are scarce. The aim of this study was to analyse incidence and prevalence of chILD in Spain., [Methods] Multicentre observational prospective study in patients from 0 to 18 years of age with chILD to analyse its incidence and prevalence in Spain, based on data reported in 2018 and 2019., [Results] A total of 381 cases with chILD were notified from 51 paediatric pulmonology units all over Spain, covering the 91.7% of the paediatric population. The average incidence of chILD was 8.18 (CI 95% 6.28–10.48) new cases/million of children per year. The average prevalence of chILD was 46.53 (CI 95% 41.81–51.62) cases/million of children. The age group with the highest prevalence were children under 1 year of age. Different types of disorders were seen in children 2–18 years of age compared with children 0–2 years of age. Most frequent cases were: primary pulmonary interstitial glycogenosis in neonates (17/65), neuroendocrine cell hyperplasia of infancy in infants from 1 to 12 months (44/144), idiopathic pulmonary haemosiderosis in children from 1 to 5 years old (13/74), hypersensitivity pneumonitis in children from 5 to 10 years old (9/51), and scleroderma in older than 10 years old (8/47)., [Conclusions] We found a higher incidence and prevalence of chILD than previously described probably due to greater understanding and increased clinician awareness of these rare diseases., [Antecedentes] Las neumopatías intersticiales pediátricas, también conocidas con el acrónimo chILD (del inglés children's Interstitial Lung Diseases), es un grupo heterogéneo de enfermedades raras con morbimortalidad relevante, cuyo diagnóstico y clasificación son complejos. Los estudios epidemiológicos son escasos. El objetivo de este trabajo fue analizar la incidencia y la prevalencia de chILD en España., [Métodos] Estudio prospectivo observacional multicéntrico en pacientes de 0 a 18 años afectos de chILD para analizar la incidencia y la prevalencia en España, a partir de datos recogidos en 2018 y 2019., [Resultados] Se recogieron 381 casos de chILD entre 51 unidades de neumología pediátrica de toda España, que cubrían el 91,7% de la población pediátrica. La incidencia promedio fue 8,18 (IC 95%: 6,28-10,48) casos nuevos/millón de niños por año. La prevalencia promedio fue de 46,53 (IC 95%: 41,81-51,62) casos/millón de niños. El grupo de edad con mayor prevalencia fue el de niños menores de un año. Se observaron diferentes entidades en niños de 2 a 18 años en comparación con niños de 0 a 2 años. Los diagnósticos más frecuentes fueron: glucogenosis intersticial pulmonar primaria en neonatos (17/65), hiperplasia de células neuroendocrinas en lactantes de uno a 12 meses (44/144), hemosiderosis pulmonar idiopática en niños de uno a 5 años (13/74), neumonía por hipersensibilidad en niños de 5 a 10 años (9/51) y esclerodermia en mayores de 10 años (8/47)., [Conclusiones] Encontramos una mayor incidencia y prevalencia de chILD que las descritas previamente, probablemente debido a un mayor conocimiento y detección de estas enfermedades raras., ATV was supported by a grant from the Spanish Society of Paediatric Pulmonology and a Short Term Scientific Mission of the Cost CA 16125 ENTeR-chILD. This work was supported by a grant from the Spanish Society of Pneumology and Thoracic Surgery (SEPAR 2017/492). AMG was supported by a grant from the project HCQ4Surfdefect, in E-Rare-3, the ERA-Net for Research on Rare Diseases (Acciones complementarias en Salud, Instituto Carlos III, Madrid, Spain, AC16/00027) and Cost CA 16125 ENTeR-chILD.

CF-COVID19-Spain Registry Group., [Background] Given the high incidence of confirmed infection by SARS-CoV-2 and mortality by COVID-19 in the Spanish population, its impact was analysed among persons with Cystic Fibrosis (CF) as a group at risk of a worse evolution. The possible causes of the incidence observed in them are explained and how CF Units have faced this health challenge is detailed., [Methods] Retrospective descriptive observational study, for which a Spanish CF Patients with Confirmed COVID-19 Registry is created, requesting information on number of people affected between 8 March–16 May 2020 and their clinical-demographic characteristics from the CF Units participating in the European Cystic Fibrosis Society Patient Registry (ECFSPR). The accumulated incidence is calculated, compared with that of the general population. Additionally, a survey (CF-COVID19-Spain) is carried out on prevention of SARS-CoV-2 infection, workings of CF Units and possible reasons for the incidence observed., [Results] COVID-19 was diagnosed in eight CF patients, one of whom had received a lung transplant. The accumulated incidence was 32/10000 in CF patients and 49/10000 in the general population. General death rate was 5.85/10000 while no CF patients included in the ECFSPR died. The characteristics of those affected and the results of the survey are described., [Conclusions] Despite being considered a disease at high risk of severe COVID-19, the low incidence and mortality in CF patients in Spain contrasts with the figures for the general population. The possible factors that would explain such findings are discussed, with the help of the results of the CF-COVID19-Spain survey.

Background Data addressing short- and long-term respiratory morbidity in moderate-late preterm infants are limited. We aim to determine the incidence of recurrent wheezing and associated risk and protective factors in these infants during the first 3 years of life. Methods Prospective, multicenter birth cohort study of infants born at 32+0 to 35+0 weeks' gestation and followed for 3 years to assess the incidence of physician-diagnosed recurrent wheezing. Allergen sensitization and pulmonary function were also studied. We used multivariate mixed-effects models to identify risk factors associated with recurrent wheezing. Results A total of 977 preterm infants were enrolled. Rates of recurrent wheezing during year (Y)1 and Y2 were similar (19%) but decreased to 13.3% in Y3. Related hospitalizations significantly declined from 6.3% in Y1 to 0.75% in Y3. Independent risk factors for recurrent wheezing during Y2 and Y3 included the following: day care attendance, acetaminophen use during pregnancy, and need for mechanical ventilation. Atopic dermatitis on Y2 and male sex on Y3 were also independently associated with recurrent wheezing. Palivizumab prophylaxis for RSV during the first year of life decreased the risk or recurrent wheezing on Y3. While there were no differences in rates of allergen sensitization, pulmonary function tests (FEV0.5 ) were significantly lower in children who developed recurrent wheezing. Conclusions In moderate-to-late premature infants, respiratory symptoms were associated with lung morbidity persisted during the first 3 years of life and were associated with abnormal pulmonary function tests. Only anti-RSV prophylaxis exerted a protective effect in the development of recurrent wheezing.

Introduction: Survival in Cystic Fibrosis (CF) is permanently increasing due to several factors, in particular the CF early diagnosis by implementation of the Newborn Screening Program (NBSP). In Spain, the NBSP was launched in 1999 in Catalonia, Castilla-Leon and Balearic Islands and in 2015 has been expanded to all communities. Objective: to describe the data of the NBSP of the different autonomous communities (ACs) in Spain. Method: Retrospective data from the NBSP through a survey sent to the 12 ACs that screening was already available in the year 2014. Resultados: in Spain the NBSP has been applied globally to nearly 3,000,000 newborns detecting 460 cases with CF. Examples of incidence are: Catalonia 1 / 6631; Castilla y Leon 1/5007, Balearic Islands 1/5853, Madrid 1 / 6160, Basque Country 1 / 7,700. Three different strategies for NBSP have been implemented: 1) TIR TIR + sweat test in three ACs ; 2) TIR TIR + genetic test + sweat test: in five; 3) TIR + genetic test in seven. The three most frequent identified mutations were: F508del, G542X and N1303K. The average age of diagnosis was within 50 days of life except in a community that one diagnosis was made after 2 months. The presence of pancreatic insufficiency ranged from 40% to 80%; Pseudomonas aeruginosa chronic infection from 0 to 20% and Staphylococcus aureus from 0 to 40%. Conclusion: this is the first global data of NBSP for CF in Spain. Results from the different programs provide an opportunity to compare all current strategies and results.

Background Airway diseases are highly prevalent in infants and cause significant morbidity. We aimed to determine the incidence and risk factors for respiratory morbidity in a Spanish cohort of moderate-to-late preterm (MLP) infants prospectively followed during their first year of life. Methods SAREPREM is a multicenter, prospective, longitudinal study. Preterm infants born at 32–35 weeks of gestation with no comorbidities were enrolled within 2 weeks of life and followed at 2–4 weeks, 6, and 12 months of age. Multivariate mixed-models were performed to identify independent risk factors associated with (i) development of bronchiolitis, (ii) recurrent wheezing, or (iii) related hospital admissions. Results Overall, 977 preterm infants were included, and 766 (78.4%) completed follow-up. Of those, 365 (47.7%) developed bronchiolitis during the first year, 144 (18.8%) recurrent wheezing, and 48 (6.3%) were hospitalized. While low birthweight, day care attendance (DCA) and school-age siblings were significantly and independently associated with both the development of bronchiolitis and recurrent wheezing, lower maternal age increased the risk for bronchiolitis and respiratory-related hospitalizations. Lastly, mechanical ventilation was associated with a higher risk of bronchiolitis and history of asthma in any parent increased the likelihood of developing recurrent wheezing. Conclusions In this study, several non-modifiable parameters (family history of asthma, low birthweight, need for mechanical ventilation) and modifiable parameters (young maternal age, DCA, or exposure to school-age siblings) were identified as significant risk factors for the development of bronchiolitis and recurrent wheezing during the first year of life in MLP infants.