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Nie X, Xu L, Bai Y, Liu Z, Liu Z, Farrington P, Zhan S. Self-controlled case series design in vaccine safety: a systematic review. Expert Rev Vaccines 2021; 21:313-324. [PMID: 34937500 DOI: 10.1080/14760584.2022.2020108] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND : An increasing number of vaccine safety studies using the self-controlled case-series (SCCS) design have been conducted in the last decade. However, there has been no comprehensive evaluation of the methodology and reporting quality of these observational studies. The purpose of this paper is to document the methodological features of studies that focused on vaccine safety using the SCCS design, and to evaluate the reporting quality of these studies to suggest future improvements on appropriate design and transparent reporting. METHODS : Databases including Medline, Embase, Web of Science, Scopus and Chinese databases were searched from inception to May 31, 2021. All observational studies regarding vaccine safety using a SCCS design were selected. Information regarding methodological elements were extracted. In addition, reporting quality was assessed using the REporting of studies Conducted using Observational Routinely collected health Data statement for PharmacoEpidemiology (RECORD-PE). RESULTS : Of the 105 studies identified, administrative databases were the main data source for vaccination records and adverse events following immunization (AEFI). 28 articles (27%) used multiple designs to verify the association, and the results obtained with the SCCS design were robust. The top three AEFI studied were intussusception, Guillain-Barré syndrome, and convulsions. Only 21 studies (20%) reported the approach for case validation by chart review. The healthy vaccinee effect was considered by 51studies (49%), with 16 of them (31%) using extended SCCS models to alleviate this effect. Overall, the reporting quality of included studies could be improved. CONCLUSIONS : This study systematically reviewed the methodology of studies regarding vaccine safety using a SCCS design and critically assessed their respective reporting quality. Case validation, the validity of assumptions for standard SCCS, and quality of reporting should be given more importance in future research projects.
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Affiliation(s)
- Xiaolu Nie
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, 100191, China.,Center for Clinical Epidemiology and Evidence-based Medicine, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, 100045, China
| | - Lu Xu
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, 100191, China
| | - Yi Bai
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, 100191, China
| | - Zuoxiang Liu
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, 100191, China
| | - Zhike Liu
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, 100191, China
| | - Paddy Farrington
- School of Mathematics and Statistics, The Open University, Milton Keynes MK7 6AA, UK
| | - Siyan Zhan
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, 100191, China.,Research Center of Clinical Epidemiology, Peking University Third Hospital, Beijing, 100191, China.,Center for Intelligent Public Health, Institute for Artificial Intelligence, Peking University, Beijing, China
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Meehan C, Bonfim C, Dasso JF, Costa-Carvalho BT, Condino-Neto A, Walter J. IN TIME: THE VALUE AND GLOBAL IMPLICATIONSOF NEWBORN SCREENING FORSEVERE COMBINED IMMUNODEFICIENCY. REVISTA PAULISTA DE PEDIATRIA : ORGAO OFICIAL DA SOCIEDADE DE PEDIATRIA DE SAO PAULO 2018; 36:388-397. [PMID: 30540106 PMCID: PMC6322803 DOI: 10.1590/1984-0462/;2018;36;4;00020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Indexed: 01/06/2023]
Affiliation(s)
- Cristina Meehan
- Division of Allergy and Immunology, Children’s Research Institute,
University of South Florida, St. Petersburg, FL, United States
| | - Carmem Bonfim
- Clinics Hospital, Universidade Federal do Paraná, Curitiba, PR,
Brazil
| | - Joseph F. Dasso
- Division of Allergy and Immunology, Children’s Research Institute,
University of South Florida, St. Petersburg, FL, United States
- Department of Biology, University of Tampa, Tampa, FL, United
States
| | - Beatriz Tavares Costa-Carvalho
- Division of Allergy, Clinical Immunology and Rheumatology,
Department of Pediatrics, Universidade Federal de São Paulo, São Paulo, SP,
Brazil
| | - Antonio Condino-Neto
- Department of Immunology, Institute of Biomedical Sciences,
Universidade de São Paulo, São Paulo, SP, Brazil
| | - Jolan Walter
- Division of Allergy and Immunology, Children’s Research Institute,
University of South Florida, St. Petersburg, FL, United States
- Division of Allergy and Immunology, Johns Hopkins All Children’s
Hospital, St. Petersburg, FL, United States
- Division of Pediatric Allergy and Immunology, Massachusetts General
Hospital, Boston, MA, United States
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da Rocha LKA, Freschi de Barros S, Bandeira F, Bollini A, Testa LHDA, Simione AJ, Souza MDOE, Zanetti LP, de Oliveira LCS, Dos Santos ACF, de Souza MP, Colturado VAR, Kalil J, Machado CM, Guilherme L. Thymopoiesis in Pre- and Post-Hematopoietic Stem Cell Transplantation. Front Immunol 2018; 9:1889. [PMID: 30245685 PMCID: PMC6137257 DOI: 10.3389/fimmu.2018.01889] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 07/31/2018] [Indexed: 12/20/2022] Open
Abstract
Hematopoietic stem cell transplantation (HSCT) is an important therapeutic option for some hematological diseases. However, patients who undergo HSCT acquire a state of immunodeficiency that causes significant mortality. Reconstitution of thymic function is needed to support the immune system. One way to measure thymic function is through T-cell receptor excision circle (TREC) quantification. TRECs are generated by T-cell receptor gene rearrangements during T-cell maturation in the thymus and represent a reliable marker for thymic output. In this study, we aimed to assess aging and malignant hematological diseases as two important factors that may influence thymic output before HSCT. We observed that patients before HSCT presented signal joint TREC (sjTREC) numbers lower than 606.55 copies/μg DNA (low values) compared with healthy individuals, with an odds ratio (OR) of 12.88 [95% confidence interval (CI): 5.26–31.53; p < 0.001]. Our results showed that a group of older individuals (≥50 years old), comprising both healthy individuals and patients, had an OR of 10.07 (95% CI: 2.80–36.20) for low sjTREC values compared with younger individuals (≤24 years old; p < 0.001). Multiple logistic regression analysis confirmed that both older age (≥50 years old) and malignant hematological diseases and their treatments were important and independent risk factors related to thymic function impairment (p < 0.001). The median sjTREC value for patients of all ages was significantly lower than the sjTREC median for the subgroup of older healthy individuals (≥50 years old; p < 0.001). These data suggested that patients before HSCT and healthy individuals exhibited age-dependent thymic impairment, and that prior treatment for hematological diseases may exacerbate aging-related deterioration of natural thymic function. Furthermore, we analyzed these patients 9 months post-HSCT and compared patients who underwent autologous HSCT with those who underwent allogeneic HSCT. Both groups of patients achieved sjTREC copy numbers similar to those of healthy individuals. We did not find a close relationship between impaired thymic function prior to HSCT and worse thymic recovery after HSCT.
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Affiliation(s)
- Luis Klaus A da Rocha
- Laboratory of Immunology, Heart Institute (InCor), Clinical Hospital, University of São Paulo, São Paulo, Brazil
| | - Samar Freschi de Barros
- Laboratory of Immunology, Heart Institute (InCor), Clinical Hospital, University of São Paulo, São Paulo, Brazil
| | - Francine Bandeira
- Hematopoietic Stem Cell Transplantation Sector, Amaral Carvalho Hospital, Jaú, Brazil
| | - Alexia Bollini
- Hematopoietic Stem Cell Transplantation Sector, Amaral Carvalho Hospital, Jaú, Brazil
| | | | - Anderson João Simione
- Hematopoietic Stem Cell Transplantation Sector, Amaral Carvalho Hospital, Jaú, Brazil
| | - Marina de O E Souza
- Hematopoietic Stem Cell Transplantation Sector, Amaral Carvalho Hospital, Jaú, Brazil
| | - Lilian P Zanetti
- Hematopoietic Stem Cell Transplantation Sector, Amaral Carvalho Hospital, Jaú, Brazil
| | | | | | - Mair Pedro de Souza
- Hematopoietic Stem Cell Transplantation Sector, Amaral Carvalho Hospital, Jaú, Brazil
| | | | - Jorge Kalil
- Laboratory of Immunology, Heart Institute (InCor), Clinical Hospital, University of São Paulo, São Paulo, Brazil
| | - Clarisse M Machado
- Laboratory of Virology, Tropical Medicine Institute (IMT), University of São Paulo, São Paulo, Brazil
| | - Luiza Guilherme
- Laboratory of Immunology, Heart Institute (InCor), Clinical Hospital, University of São Paulo, São Paulo, Brazil
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