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Arshad A, Gardiner J, Ho C, Rees P, Chadda K, Baker A, Sutcliffe AG. Population-based screening methods in biliary atresia: a systematic review and meta-analysis. Arch Dis Child 2023; 108:468-473. [PMID: 36797045 DOI: 10.1136/archdischild-2022-324946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 01/30/2023] [Indexed: 02/18/2023]
Abstract
OBJECTIVE The aim of this study was to investigate tested methods of population-based biliary atresia (BA) screening. DESIGN We searched 11 databases between 1 January 1975 and 12 September 2022. Data extraction was independently done by two investigators. MAIN OUTCOME MEASURES Our primary outcomes were: sensitivity and specificity of screening method in BA detection, age at Kasai, BA associated morbidity and mortality, cost-effectiveness of screening. RESULTS Six methods of BA screening were evaluated: stool colour charts (SCCs), conjugated bilirubin measurements, stool colour saturations (SCSs), measurements of urinary sulfated bile acids (USBAs), assessments of blood spot bile acids and blood carnitine measurements.In a meta-analysis, USBA was the most sensitive and specific, with a pooled sensitivity and specificity of 100.0% (95% CI 2.5% to 100.0%) and 99.5% (95% CI 98.9% to 99.8%) (based on one study). This was followed by conjugated bilirubin measurements: 100.0% (95% CI 0.0% to 100.0%) and 99.3% (95% CI 91.9% to 99.9%), SCS: 100.0% (95% CI 0.00% to 100.0%) and 92.4% (95% CI 83.4% to 96.7%), and SCC: 87.9% (95% CI 80.4% to 92.8%) and 99.9% (95% CI 99.9% to 99.9%).SCC reduced the age of Kasai to ~60 days, compared with 36 days for conjugated bilirubin. Both SCC and conjugated bilirubin improved overall and transplant-free survival. The use of SCC was considerably more cost-effective than conjugated bilirubin measurements. CONCLUSION Conjugated bilirubin measurements and SCC are the most researched and demonstrate improved sensitivity and specificity in detecting BA. However, their use is expensive. Further research into conjugated bilirubin measurements, as well as alternative methods of population-based BA screening, is required. PROSPERO REGISTRATION NUMBER CRD42021235133.
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Affiliation(s)
- Adam Arshad
- Population, Policy & Practice Department, UCL GOS Institute of Child Health, London, UK
| | - Julian Gardiner
- Population, Policy & Practice Department, UCL GOS Institute of Child Health, London, UK
| | - Carmen Ho
- Population, Policy & Practice Department, UCL GOS Institute of Child Health, London, UK
| | - Philippa Rees
- Population, Policy & Practice Department, UCL GOS Institute of Child Health, London, UK
| | - Karan Chadda
- Population, Policy & Practice Department, UCL GOS Institute of Child Health, London, UK
| | - Alastair Baker
- Department of Paediatric Hepatology, Kings College Hospital, London, UK
| | - Alastair G Sutcliffe
- Population, Policy & Practice Department, UCL GOS Institute of Child Health, Institute of Child Health, London, UK
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Schreiber RA, Harpavat S, Hulscher JBF, Wildhaber BE. Biliary Atresia in 2021: Epidemiology, Screening and Public Policy. J Clin Med 2022; 11:jcm11040999. [PMID: 35207269 PMCID: PMC8876662 DOI: 10.3390/jcm11040999] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 02/05/2022] [Accepted: 02/09/2022] [Indexed: 12/12/2022] Open
Abstract
Biliary atresia (BA) is a rare newborn liver disease with significant morbidity and mortality, especially if not recognized and treated early in life. It is the most common cause of liver-related death in children and the leading indication for liver transplantation in the pediatric population. Timely intervention with a Kasai portoenterostomy (KPE) can significantly improve prognosis. Delayed disease recognition, late patient referral, and untimely surgery remains a worldwide problem. This article will focus on biliary atresia from a global public health perspective, including disease epidemiology, current national screening programs, and their impact on outcome, as well as new and novel BA screening initiatives. Policy challenges for the implementation of BA screening programs will also be discussed, highlighting examples from the North American, European, and Asian experience.
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Affiliation(s)
- Richard A. Schreiber
- Division of Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Faculty of Medicine, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
- Correspondence: ; Tel.: +1-604-875-2332 (ext. 1); Fax: +1-604-875-3244
| | - Sanjiv Harpavat
- Division of Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Baylor College of Medicine and Texas Children’s Hospital, Houston, TX 77030, USA;
| | - Jan B. F. Hulscher
- Department of Surgery, Division of Pediatric Surgery, University Medical Center Groningen, University of Groningen, 9713 GZ Groningen, The Netherlands;
| | - Barbara E. Wildhaber
- Swiss Pediatric Liver Center, Division of Pediatric Surgery, Department of Pediatrics, Gynecology, and Obstetrics, University of Geneva, 1205 Geneva, Switzerland;
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Uecker M, Kuebler JF, Schukfeh N, Pfister ED, Baumann U, Petersen C, Madadi-Sanjani O. Kasai Procedure in Patients Older Than 90 Days: Worth a Cut. Eur J Pediatr Surg 2022; 32:80-84. [PMID: 34918313 DOI: 10.1055/s-0041-1740556] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
INTRODUCTION Age at Kasai portoenterostomy (KPE) has been identified as a predictive factor for native-liver survival in patients with biliary atresia (BA). Outcomes of pediatric liver transplantation (LT) have improved over recent years. It has been proposed to consider primary LT as a treatment option for late-presenting BA infants instead of attempting KPE. We present our experience with patients older than 90 days undergoing KPE. MATERIALS AND METHODS A retrospective chart review of patients with BA undergoing KPE at our institution between January 2010 and December 2020 was performed. Patients 90 days and older at the time of surgery were included. Patients' characteristics, perioperative data, and follow-up results were collected. Eleven patients matched the inclusion criteria. Mean age at KPE was 108 days (range: 90-133 days). RESULTS Postoperative jaundice clearance (bilirubin < 2 mg/dL) at 2-year follow-up was achieved in three patients (27%). Eight patients (73%) received a liver transplant at a mean of 626 days (range: 57-2,109 days) after KPE. Four patients (36%) were transplanted within 12 months post-KPE. Two patients died 237 and 139 days after KPE due to disease-related complications. One patient is still alive with his native liver, currently 10 years old. CONCLUSION Even when performed at an advanced age, KPE can help prolong native-liver survival in BA patients and offers an important bridge to transplant. In our opinion, it continues to represent a viable primary treatment option for late-presenting infants with BA.
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Affiliation(s)
- Marie Uecker
- Department of Pediatric Surgery, Hannover Medical School, Hannover, Germany
| | - Joachim F Kuebler
- Department of Pediatric Surgery, Hannover Medical School, Hannover, Germany
| | - Nagoud Schukfeh
- Department of Pediatric Surgery, Hannover Medical School, Hannover, Germany
| | - Eva-Doreen Pfister
- Department of Pediatric Gastroenterology, Hannover Medical School, Hannover, Germany
| | - Ulrich Baumann
- Department of Pediatric Gastroenterology, Hannover Medical School, Hannover, Germany
| | - Claus Petersen
- Department of Pediatric Surgery, Hannover Medical School, Hannover, Germany
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Rabbani T, Guthery SL, Himes R, Shneider BL, Harpavat S. Newborn Screening for Biliary Atresia: a Review of Current Methods. Curr Gastroenterol Rep 2021; 23:28. [PMID: 34817690 DOI: 10.1007/s11894-021-00825-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/24/2021] [Indexed: 12/12/2022]
Abstract
PURPOSE OF REVIEW Biliary atresia is a serious neonatal liver disease due to obstructed bile ducts that has better outcomes when detected and treated in the first 30-45 days of life. This review examines different methods to screen newborns for biliary atresia as well as discusses observations from ongoing screening programs implemented in parts of the United States. RECENT FINDINGS Screening strategies for biliary atresia include detecting persistent jaundice, examining stool color, testing fractionated bilirubin levels, or measuring bile acid levels from dried blood spot cards. The stool color card program is the most widely used screening strategy worldwide. An alternative approach under investigation in the United States measures fractionated bilirubin levels, which are abnormal in newborns with biliary atresia. Fractionated bilirubin screening programs require laboratories to derive reference ranges, nurseries to implement universal testing, and healthcare systems to develop infrastructure that identifies and acts upon abnormal results. Biliary atresia meets the disease-specific criteria for newborn screening. Current studies focus on developing a strategy which also meets all test-specific criteria. Such a strategy, if implemented uniformly, has the potential to accelerate treatment and reduce biliary atresia's large liver transplant burden.
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Affiliation(s)
- Tebyan Rabbani
- Department of Pediatrics, University of Texas Health San Antonio, San Antonio, TX, USA
| | - Stephen L Guthery
- Department of Pediatric Gastroenterology, Hepatology, and Nutrition, University of Utah and Intermountain Primary Children's Hospital, Salt Lake City, UT, USA
| | - Ryan Himes
- Department of Pediatric Gastroenterology, Hepatology, and Nutrition, Ochsner Health, New Orleans, LA, USA
| | - Benjamin L Shneider
- Department of Pediatrics, Section of Pediatric Gastroenterology, Hepatology, and Nutrition, Baylor College of Medicine and Texas Children's Hospital, 6621 Fannin Street, CCC 1010, Houston, TX, 77030, USA
| | - Sanjiv Harpavat
- Department of Pediatrics, Section of Pediatric Gastroenterology, Hepatology, and Nutrition, Baylor College of Medicine and Texas Children's Hospital, 6621 Fannin Street, CCC 1010, Houston, TX, 77030, USA.
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Madadi-Sanjani O, Kuebler JF, Uecker M, Pfister ED, Baumann U, Kunze-Hullmann B, Blaser J, Buck T, Petersen C. Province-Wide Stool Color Card Screening for Biliary Atresia in Lower-Saxony: Experiences with Passive Distribution Strategies and Results. Int J Neonatal Screen 2021; 7:ijns7040075. [PMID: 34842600 PMCID: PMC8629020 DOI: 10.3390/ijns7040075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/01/2021] [Accepted: 11/03/2021] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Stool color card (SCC) screenings for biliary atresia (BA) have shown to improve Kasai timing and outcome significantly. Both obligatory and non-obligatory screenings with passive distribution strategies have proven to be effective. Therefore, we have initiated a voluntary SCC program and aim to describe our experience. METHODS Since 2017 we supply all maternity wards in Lower-Saxony with SCC. Attending pediatricians and parents of BA infants were contacted via questionnaires and asked for their evaluation of the SCC screening. RESULTS 85.2% of attending pediatricians support the SCC screening, but only 78.1% considered the initiative useful. In their clinical routine, only 67% of visiting parents report to have received an SCC at the maternity hospital. In the group of parents of BA infants, only 54% (7/13) had received an SCC. Out of those seven parents, only one had referred their child to a children's hospital based on pathological SCC results. The lack of SCC education in the maternity hospitals was made responsible by parents. Within three years, only one infant with BA was identified through the SCC. CONCLUSIONS Our voluntary SCC screening shows serious limitations with inacceptable distribution of SCCs and low acceptance of attending pediatricians. SCC programs in decentralized health care systems without educational campaigns, standardized diagnostic and treatment algorithms and the definition of reference centers are additional burdens for local health care providers without the promised benefit.
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Affiliation(s)
- Omid Madadi-Sanjani
- Department of Pediatric Surgery, Hannover Medical School, 30625 Hannover, Germany; (J.F.K.); (M.U.); (C.P.)
- Correspondence: ; Tel.: +49-511-5329053; Fax: +49-511-5328095
| | - Joachim F. Kuebler
- Department of Pediatric Surgery, Hannover Medical School, 30625 Hannover, Germany; (J.F.K.); (M.U.); (C.P.)
| | - Marie Uecker
- Department of Pediatric Surgery, Hannover Medical School, 30625 Hannover, Germany; (J.F.K.); (M.U.); (C.P.)
| | - Eva-Doreen Pfister
- Division of Pediatric Gastroenterology and Hepatology, Department of Pediatric Kidney, Liver and Metabolic Diseases, Hannover Medical School, 30625 Hannover, Germany; (E.-D.P.); (U.B.)
| | - Ulrich Baumann
- Division of Pediatric Gastroenterology and Hepatology, Department of Pediatric Kidney, Liver and Metabolic Diseases, Hannover Medical School, 30625 Hannover, Germany; (E.-D.P.); (U.B.)
- Liver Unit, Birmingham Women’s and Children’s Hospital, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham B4 6NH, UK
| | - Berit Kunze-Hullmann
- Leberkrankes Kind e.V., National German Patient Organization for Diseases of the Liver in Children, 20038 Hamburg, Germany;
| | - Jochen Blaser
- Representative Office of Lower Saxony, Techniker Krankenkasse (Health Insurance), 30159 Hannover, Germany;
| | - Thomas Buck
- Medical Association of Lower Saxony, Representative Office of Hannover, 30625 Hannover, Germany;
| | - Claus Petersen
- Department of Pediatric Surgery, Hannover Medical School, 30625 Hannover, Germany; (J.F.K.); (M.U.); (C.P.)
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El-Shabrawi MH, Baroudy SR, Hassanin FS, Farag AE. A pilot study of the value of a stool color card as a diagnostic tool for extrahepatic biliary atresia at a single tertiary referral center in a low/middle income country. Arab J Gastroenterol 2021; 22:61-65. [PMID: 33664005 DOI: 10.1016/j.ajg.2020.12.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 11/01/2020] [Accepted: 12/28/2020] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND STUDY AIMS Biliary atresia (BA) is a major cause of hepatic failure and consequent liver transplantation in pediatrics. If BA is not diagnosed early and the proper surgical intervention is not performed before the age of 3 months, the survival of the affected infant is significantly reduced. In 1994, a stool color card (SCC) for early detection of BA was developed and used in Japan, a country where the parents' socioeconomic and education levels are high. We aimed to assess the value of using the SCC as a screening tool for early diagnosis of BA at a tertiary referral center in Egypt (a low/middle-income country). PATIENTS AND METHODS This prospective study enrolled 108 infants (56 females) aged 1 day to 4 months who presented with cholestasis to the Hepatology Unit of Cairo University Children's Hospital from January 2018 to August 2019. In most of our patients, the mothers were the main caregivers and the parents' socioeconomic and education levels were generally modest or low. We utilized the SCC courtesy of the Perinatal Services BC (Vancouver, Canada) with an Arabic translation. This SCC contains nine colored stool photos: the first six are ranked as abnormal colors and the last three are ranked as normal. RESULTS We found that almost all referring physicians were unfamiliar with or unaware of the SCC concept. Twenty-six of our babies' mothers were illiterate and 36 had not completed their primary school education. In spite of this low education level, 43 mothers of babies who were finally confirmed to have BA correctly matched a stool color of BA on the SCC with their babies' stools, and 56 mothers of babies who were finally confirmed not to have BA correctly matched a stool color not of BA with their babies' stools. Only nine mothers made a wrong match. Therefore, the overall "lay" mothers' sensitivity and specificity in diagnosis of BA using the SCC were 93.48% (95% confidence interval [CI] 82.1%-98.63%) and 90.32% (95% CI 80.12%-96.37%), respectively. CONCLUSION To the best of our knowledge, this is the first study reporting the use of the SCC (with an Arabic translation) in a low/middle-income country. Despite the referring physicians' unfamiliarity with the SCC and the mothers' relatively low education level at our center; SCC proved to be a simple, efficient, highly sensitive, specific, and applicable method for early diagnosis of BA. Therefore, SCC screening might increase motherś (as well as physicianś) awareness of BA, and we recommend that it be more publicized and used as a mass neonatal screening tool in low/middle-income countries such as Egypt.
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Affiliation(s)
| | | | | | - Ahmed E Farag
- Damanhour Medical National Institute, Ministry of Health and Population, Beheira, Egypt
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Neonatale Cholestase. Monatsschr Kinderheilkd 2021. [DOI: 10.1007/s00112-020-01042-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Angelico R, Liccardo D, Paoletti M, Pietrobattista A, Basso MS, Mosca A, Safarikia S, Grimaldi C, Saffioti MC, Candusso M, Maggiore G, Spada M. A novel mobile phone application for infant stool color recognition: An easy and effective tool to identify acholic stools in newborns. J Med Screen 2020; 28:230-237. [PMID: 33241758 DOI: 10.1177/0969141320974413] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVES Early diagnosis of biliary atresia is essential to improve long-term outcomes. Newborn screening with an infant stool color card allows early recognition of biliary atresia patients. Our aim was to develop and validate a mobile phone application (PopòApp) able to identify acholic stools. METHODS An intuitive app was developed for iOS and Android smartphones. A learning machine process was used to generate an algorithm for stools color recognition based on the seven colors of the infant stool color card, which were considered as the gold standard. Consecutive images of stools were taken by the PopòApp, directly into the diapers of children aged ≤6 months. The PopòApp classified the photographs as "normal", "acholic" or "uncertain". To validate the PopòApp, four doctors independently classified all images, and only those for which all doctors agreed were included. The sensitivity, specificity, positive/negative predictive values, and accuracy of the PopòApp were evaluated. RESULTS Of 165 images collected, 160 were included in the study. All acholic stools were recognized by the PopòApp. The PopòApp sensitivity was 100% (95% CI:93.9%-100%) with no false negatives, regardless of the brand of phone. The specificity was 99.0% (95% CI:94.6%-99.9%). The accurancy of the PopòApp was 99.4% (95% CI:96.6%-99.9%), with a positive predictive value of 98.4% (95% CI:89.8%-99.8%). CONCLUSION The current study proved, in a large cohort, that the PopòApp is an accurate and easy tool for recognition of acholic stools. The mobile App may represent an effective strategy for the early referral of children with acholic stools, and potentially could improve the outcomes of biliary atresia.
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Affiliation(s)
- Roberta Angelico
- Division of Abdominal Transplantation and Hepatobiliopancreatic Surgery, Bambino Gesù Children's Hospital IRCCS, Rome, Italy.,Department of Surgical Science, HPB and Transplant Unit, University of Rome Tor Vergata, Rome, Italy
| | - Daniela Liccardo
- Division of Gastroenterology, Hepatology and Nutrition, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | - Monica Paoletti
- Division of Abdominal Transplantation and Hepatobiliopancreatic Surgery, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | - Andrea Pietrobattista
- Division of Gastroenterology, Hepatology and Nutrition, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | - Maria S Basso
- Division of Gastroenterology, Hepatology and Nutrition, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | - Antonella Mosca
- Division of Gastroenterology, Hepatology and Nutrition, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | - Samira Safarikia
- Division of Abdominal Transplantation and Hepatobiliopancreatic Surgery, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | - Chiara Grimaldi
- Division of Abdominal Transplantation and Hepatobiliopancreatic Surgery, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | - Maria C Saffioti
- Division of Abdominal Transplantation and Hepatobiliopancreatic Surgery, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | - Manila Candusso
- Division of Gastroenterology, Hepatology and Nutrition, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | - Giuseppe Maggiore
- Division of Gastroenterology, Hepatology and Nutrition, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | - Marco Spada
- Division of Abdominal Transplantation and Hepatobiliopancreatic Surgery, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
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Gu YH, Zhao JQ, Kong YY, Yang HH, Diao M, Li L, Nomachi S, Tezuka M, Hanai J, Matsui A. Repeatability and Reliability of Home-Based Stool Color Card Screening for Biliary Atresia Based on Results in China and Japan. TOHOKU J EXP MED 2020; 252:365-372. [PMID: 33342972 DOI: 10.1620/tjem.252.365] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Biliary atresia (BA) is the most frequent hepatic cause of death in early childhood. Early referral and timely Kasai portoenterostomy are essential for the improvement of long-term native liver survival rate of BA patients. Screening with stool color card (SCC) has been implemented in Japan since 1994. Recently current digital edition of SCC consisted of seven digitally created images was introduced to China. Our study aimed to evaluate the repeatability and reliability of same edition of SCC used in Beijing, China and Sapporo, Japan. In Beijing from 2013 to 2014, SCCs were distributed to infants' guardians by trained nurses in maternal facilities during information sessions on neonatal screening programs. SCC was used at three checkpoints for each infant after birth for screening. The SCC data were collected from 27,561 infants (92.5%) in Beijing by 42-day health checkup, mobile phone and social network services. In Sapporo from 2012 to 2015, the SCCs with a postcard and guardian instructions were inserted into Maternal and Child Health Handbook and distributed to all pregnant women. The data were collected from a total of 37,478 (94.3%) infants in Sapporo via the postcard during the 1st month infant health checkup. We thus identified two BA patients in Sapporo and two BA patients in Beijing. High rates of sensitivity and specificity in both cities were observed. The frequency distribution of color images on SCC reported in both cities was similar. This study shows excellent repeatability and reliability of the current digital edition of SCC.
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Affiliation(s)
- Yan-Hong Gu
- Department of Hygiene and Public Health, Osaka Medical College
| | - Jin-Qi Zhao
- Department of Newborn Screening, Beijing Obstetrics and Gynecology Hospital, Capital Medical University
| | - Yuan-Yuan Kong
- Department of Newborn Screening, Beijing Obstetrics and Gynecology Hospital, Capital Medical University
| | - Hai-He Yang
- Department of Newborn Screening, Beijing Obstetrics and Gynecology Hospital, Capital Medical University
| | - Mei Diao
- Department of Surgery, Capital Institute of Pediatrics
| | - Long Li
- Department of Surgery, Capital Institute of Pediatrics
| | - Shosuke Nomachi
- Health and Science Section (Maternal and Child Screening), Sapporo City Institute of Public Health
| | - Michiko Tezuka
- Health and Science Section (Maternal and Child Screening), Sapporo City Institute of Public Health
| | - Junji Hanai
- Hokkaido Pharmaceutical Association Public Health Examination Center
| | - Akira Matsui
- Department of Hepatology, National Medical Center for Children and Mothers, National Center for Child Health and Development
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