Revista Espanola De Salud Publica最新文献

Objective: Newborn screening programmes (NBSP) have experienced a qualitative breakthrough due to the implementation of tandem mass spectrometry. However, the tests used give rise to false positives (FP) generating an excessive request for second samples with the consequent anxiety of the families. In order to avoid this problem several programmes have developed second-tier tests (2TT).

Methods: This article presents our experience in the implementation of 2TT in the NBSP of Catalonia, as well as in other international programmes.

Results: From 2004 to the present, 2TT tests have been developed for more than 30 diseases. The use of 2TT helps to decrease the FP rate and increase the positive predictive value (PPV). In the NBSP of Catalonia, the implementation of 2TT for the detection of methylmalonic and propionic acidemias, homocystinurias, maple syrup disease and citrulinaemia, has managed to increase the PPV to 95% and decrease the PF rate to less than 0.01%. In cystic fibrosis, the application of 2TT slightly increases PPV but with a significant decrease in the request for second samples and in the number of cases referred to clinical units.

Conclusions: The introduction of 2TT in the NBSP allows to reduce considerably the FP, decreases the number of requested samples, as well as both anxiety and stress of the families, at the same time that the hospital costs are reduced and the PPV is increased, improving notably the efficiency of the NBSP.

Severe combined immunodeficiency (SCID), the most severe form of T-cell immunodeficiency, can be screened at birth by quantifying T-cell receptor excision circles (TREC) in dried blood spot (DBS) samples. Early detection of this condition speeds up the establishment of appropriate treatment and increases the patient's life expectancy. Newborn screening for SCID started in January 2017 in Catalonia, the first Spanish and European region to universally include this testing. The results obtained in the first three years and a half of experience (January 2017 - June 2020) are shown here, using EnLite Neonatal TREC kit (Perkin Elmer) with 20 copies/µL as TREC detection cutoff. Of 222,857 newborns screened, 48 tested positive: three patients were diagnosed with SCID (incidence 1:74,285); 17 patients had clinically significant T-cell lymphopenia (non-SCID) with an incidence of 1 in 13,109 newborns; twenty two patients were considered false-positive cases because of an initially normal lymphocyte count with normalization of TREC between 3 and 6 months of life; one case had transient lymphopenia due to an initially low lymphocyte count with recovery in the following months; and five patients are still under study. The results obtained provide further evidence of the benefits of including this disease in newborn screening programs. Even longer follow-up could be necessary to define the exact incidence of SCID in Catalonia.

Objective: Under the declaration of the state of alarm (SA) in efforts to control COVID-19, normal development of health programs was threatened. The aim of the study was the evaluation of COVID 19 emergency and SA approval impact on neonatal Endocrine and Metabolic Disorders Program (EMDP) and Neonatal Hearing Program (HP) in Madrid.

Methods: Qualitative and quantitative descriptive study was conducted. Semistructured interview was designed and developed to picture newborn screening activities taking place from January 1st to 31st of April 2020. To describe the undergo rates of newborn screening, neonatal screening information system (RECRINE) and martenity and prenatal care units were studied. Differences were analyzed using Chi2 test (p value = 0.05).

Results: More than 70% interviews were reported. Early hospital discharges, between 24 and 48h, were made in more than 80% hospitals. Screening programs were adapted in more than 75% health care centers. EMDP 19 diseases, RECRINE and Clinical Reference Units (RCU) referral were conducted. No significant incidences were observed in diagnostic confirmation and treatment in the RCU. RCU were adapted because of the reorganization of health care. 88.5% of the hospitals showed higher than 95% coverage rates on Hearing screening and SEM. No differences were observed compared to the pre-epidemic period.

Conclusions: Our study demonstrates PCN professionals resilience. The importance of designing periodic evaluations to understand and alleviate the COVID-19 impact is remarkable. We need to assure 2020 newborns attention health care quality.

The Catalonian Newborn Screening Program (CNSP) began in 1969, in Barcelona. It was promoted by Dr. Juan Sabater Tobella and supported by Barcelona Provincial Council and Juan March Foundation. That is how the Institute of Clinical Biochemistry was born, whose aims were diagnosis, research and teaching, along with the spirit of contributing to the prevention of mental retardation. The CNSP began with the detection of phenylketonuria (PKU), and, in 1982, the Program was expanded with the inclusion of congenital hypothyroidism detection. Towards 1990, the Program covered almost 100% of all newborns (NB) in Catalonia. In 1999, the CNSP was expanded with the incorporation of cystic fibrosis. It took fourteen years, until 2013, to make the largest expansion so far, with the incorporation of 19 metabolic diseases to the screening panel. The detection of sickle cell disease began in 2015 and in 2017 the detection of severe combined immunodeficiency was included. Currently, the CNSP includes 24 diseases in its main panel. Since 1969, 2,787,807 NBs have been screened, of whom 1,724 have been diagnosed with any of these diseases, and 252 of other disorders by differential diagnosis with those included in the main panel. The global prevalence is 1: 1,617 NBs affected by any of the diseases included in the CNSP and 1: 1,140 NBs if incidental findings diagnosed through the CNSP are included.

Objective: The European Commission Initiative on Breast Cancer (ECIBC) has developed new recommendations on breast cancer screening and diagnosis. The objective of this work was to adapt these recommendations to Spanish in order to implement and guarantee the quality and success of breast cancer screening programmes (PCCM) throughout the Spanish territory.

Methods: The new European Guidelines on Screening and Diagnosis of Breast Cancer have been prepared by a multidisciplinary panel of experts and patients (Guidelines Development Group, GDG). The recommendations inclu-ded are supported by systematic reviews of the evidence conducted by a team of researchers from the Ibero-American Cochrane Center. For its preparation, the European Commission's conflict of interest management rules were applied and the GRADE (Grading of Recommendations Assessment, Development and Evaluation) methodology was used. The GRADE evidence-to-decision (EtD) frameworks were used to minimize potential influence of interests on the recommendations.

Results: As a result of the systematic reviews carried out, the GDG published on the ECIBC website a list of recommendations as part of the guidelines for the screening and diagnosis of breast cancer, which were translated into Spanish in this work.

Conclusions: The adaptation to Spanish of the new recommendations helps their implementation and the creation of a uniform PCCM throughout the Spanish territory. All of this improves informed decision making and the success of PCCM.

Objective: The objective of this study was to analyze the clinical suspicion and where the patients were when they received the result of the neonatal screening for 21 hydroxylase deficiency (21OHD).

Methods: The present data were derived from a retrospective analysis of a group of patients with classical 21OHD discovered by newborn screening and treated at the Center for Clinical Follow-up of the Autonomous Community of Madrid. Stadistic analysis of the data was performed using version 15.5 of the SPSS® software.

Results: During the period from 1990 to 2015 of this study 46 children were diagnosed with classical 21OHD [36 with the salt-wasting (SW) and 10 with simple virilizing form (SV)]. The median age at diagnosis for the patients with the SW and SV form were 8.0 (6.0-9.0) and 18.0 (14.5-37.5) days respectively (P=0.001). In 35 (76.1%) patients the disease had not been suspected before the result of newborn screening, 28 patients affected by SW form, with a potential risk of death due to adrenal crisis (of which, in addition 6 women with incorrect assignment of sex at birth) and 7 patients affected with SV form. Two thirds of the patients with classic forms identified by neonatal screening were in their homes without suspicion of any disease or pending any additional study.

Conclusions: Neonatal screening provided better performance than clinical suspicion. In the majority of patients with 21OHD detected by newborn screening, the diagnosis by screening was anticipated to the clinical suspicion of the disease even in female patients with ambiguous genitalia.

Galician newborn screening program for early detection of endocrine and metabolic diseases began in 1978 and was a pioneer in expanded newborn screening in Spain with the incorporation of mass spectrometry in July 2000. As a primary objective, 28 diseases are screened, including those recommended SNS except sickle cell anemia which is in the inclusion phase. In its 20-year history, 404,616 newborns (nb) have been analyzed, identifying 547 cases affected by the diseases included, with a global incidence of 1: 739 newborns and 1: 1.237 of the screened inborn errors of metabolism (IEM) (1:1.580 nb if excluding benign hyperphenylalaninemia-HPA), with an average participation of 99.35%, progressively higher during the analyzed period. Among the pathologies screened, congenital hypothyroidism (1:2.211 nb), cystinuria (1:4.129 nb) and HPA (1:5.699 nb), followed by phenylketonuria and cystic fibrosis (1:10,936 nb) stand out for their incidence. Sixty-six cases of false positives were identified (seventeen of them in relation to maternal pathology) and five false negatives, being the overall PPV and NPV of the program respectively of 89.2% and 99.99%, with a sensitivity of 99.09% and a specificity of 99.98%. The mortality rate of diagnosed CME patients is 1.52%, with eleven cases presenting symptoms prior to the screening result (2%). The intelligence quotient of IEM patients at risk of neurological involvement is normal in more than 95% of cases.

Objective: The purpose of this paper was to describe the diagnosis, treatment and follow-up of patients diagnosed with congenital hypothyroidism (CH) by the Neonatal Screening Program in the Autonomous Community of Madrid during the state of alarm due to the COVID-19 health crisis.

Methods: The data were extracted from the retrospective analysis of patients diagnosed with CH and treated at the Clinical Diagnosis and Follow-up Center of CH located in the Pediatric Endocrinology Unit of the General University Hospital Gregorio Marañon.

Results: During the period between March 14 and June 21, 2020, 7 neonates were diagnosed with congenital hypothyroidism. The Screening Center contacted the Clinical Diagnosis and Follow-up Center urgently, with the location and clinical assessment of the patient on the same day, performing the usual complementary examinations in all of them according to clinical pathway. The median age of diagnosis was 15.5 days (range 7.00-24.00). The subsequent clinical and analytical follow-up was carried out in all cases according to the recommended times. All patients presented normalization of the thyroid function after two weeks of treatment.

Conclusions: All patients seen at the Congenital Hypothyroidism Clinical Diagnosis and Follow-up Center during the alarm state period were diagnosed, treated and reevaluated following the usual clinical pathways without incidents. The current epidemiological situation of the COVID-19 pandemic has revealed the correct functioning of the circuit of the Congenital Hypothyroidism Screening Program in less favorable circumstances.

Neonatal Screening Programs (PCN) have widely demonstrated their benefits since Dr. Guthrie published his developments on Phenylketonuria (PKU) in 1961. This paper describes how a simple and effective organization, which incorporates all the fundamental actors under the responsibility of the Public Health Directorate (DSP), has managed to ensure that the PCN of the Basque Country meets all the objectives required for a population screening. The acceptance by Basque society of the PCN allowed it to exceed 95% coverage in its second year of operation. Likewise, the limited negative social impact of PCN is evidenced by its low number of false positives and incorrect samples. Excellent response times allow every newborn with a positive result to have an early diagnosis and optimal initiation of treatment. There are two relevant experiences that support the importance of the effective exercise of the responsibility of the DSP. Congenital adrenal hyperplasia (CAH) was incorporated into the PCN in 1991 meeting all technical and clinical criteria. At the request of the experts, the DSP ordered in 1993 to cease this activity showing that it did not provide the expected benefits. The problems of organically integrating the PCN into the healthcare system were also experienced. The need to compete for resources put public health activities, including the PCN, at risk and led to their return to direct dependence on the DSP. The availability of this structure, in addition to facilitating the incorporation of other screenings, allows facing the future challenges.

The Neonatal Screening Program in Catalonia from its inception fifty years ago until today, has enabled the early diagnosis and treatment of more than 2,000 newborns. In the last decade, the Program has undergone various extensions regarding its panel of diseases and has improved its evaluation with the inclusion of quality indicators in all its stages. One of the pending subjects of the screening program has been the improvement of the quality indexes related to the sample's arrival time to the laboratory after their extraction. The extension of the territory, the dispersion of numerous maternal centers, as well as the diversity and heterogeneity of the sample transport systems, have been an obstacle to quality compliance of these indexes. With the aim of reducing the period of samples arrival to the laboratory and continue to move towards meeting the standards established by the Ministry of Health, in 2020 a unified sample transport system has been implemented for the entire Catalan territory. The times obtained during the first months with the new system, have shown a notable improvement in the results, achieving a reduction of 50% of the days between the extraction of the sample and its arrival at the laboratory.