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Coelho MPP, de Vries TP, Pires AM, Parreira MP, de Alvarenga ÉR, Cambraia RD, Dos Santos RR, Bezerra JMT, Colosimo EA, Rocha GA, Silva LD. Skeletal muscle mass increases after viral eradication with direct-acting antivirals in patients with chronic hepatitis C: A longitudinal study. Aliment Pharmacol Ther 2024; 59:1387-1401. [PMID: 38501893 DOI: 10.1111/apt.17950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 10/16/2023] [Accepted: 03/04/2024] [Indexed: 03/20/2024]
Abstract
BACKGROUND Results of studies evaluating the effect of viral eradication following direct-acting antiviral (DDA) therapy on skeletal muscle mass of patients with chronic hepatitis C (CHC) are scarce. AIM To assess the components of sarcopenia (low muscle mass, low muscle strength and low physical performance) in a cohort of CHC individuals before and after DAA therapy. METHODS We performed a longitudinal study of patients with CHC who underwent body composition assessment before (T0), and at 12 (T1) and 48 (T2) weeks after DDA therapy. Bioelectrical Impedance Analysis was used to assess skeletal mass muscle (SM) and phase angle (PhA). SM index (SMI) was calculated by dividing the SM by squared height. Muscle function was evaluated by hand grip strength (HGS) and timed up-and-go (TUG) test. Mixed-effects linear regression models were fitted to SMI, HGS and physical performance and were used to test the effect of HCV eradication by DAA. RESULTS 62 outpatients (mean age, 58.6 ± 10.8 years; 58% with compensated cirrhosis) were included. Significant decreases in liver fibrosis markers and an increase of 0.20 and 0.22 kg/m2 in the SMI were observed at T1 and T2. Following DAA therapy, an increase of one unit of PhA was associated with a reduction of 0.38 min in TUG. CONCLUSION HCV eradication with DAA therapy was associated with a dynamic reduction of non-invasive markers of liver fibrosis and increased muscle mass in 62 patients with CHC who had an undetectable HCV load at 12 weeks after completion of antiviral treatment.
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Affiliation(s)
- Marta Paula Pereira Coelho
- Sciences Applied to Adult Health Care Post-Graduate Programme, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
- Outpatient Clinic of Viral Hepatitis, Instituto Alfa de Gastroenterologia, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Thais Pontello de Vries
- Sciences Applied to Adult Health Care Post-Graduate Programme, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
- Outpatient Clinic of Viral Hepatitis, Instituto Alfa de Gastroenterologia, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Aline Marcos Pires
- Sciences Applied to Adult Health Care Post-Graduate Programme, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
- Outpatient Clinic of Viral Hepatitis, Instituto Alfa de Gastroenterologia, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Milena Pereira Parreira
- Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Érika Ramos de Alvarenga
- Department of Statistics, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Rodrigo Dias Cambraia
- Outpatient Clinic of Viral Hepatitis, Instituto Alfa de Gastroenterologia, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Rodrigo Ribeiro Dos Santos
- Department of Internal Medicine, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Juliana Maria Trindade Bezerra
- Biological Sciences Degree Course, Universidade Estadual do Maranhão (UEMA), Lago da Pedra, Brazil
- Animal Science Post-Graduate Programme, Universidade Estadual do Maranhão (UEMA), São Luís, Brazil
- Parasitology Post-Graduate Programme, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Enrico Antonio Colosimo
- Department of Statistics, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Gifone Aguiar Rocha
- Laboratory of Research in Bacteriology, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Luciana Diniz Silva
- Sciences Applied to Adult Health Care Post-Graduate Programme, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
- Outpatient Clinic of Viral Hepatitis, Instituto Alfa de Gastroenterologia, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Department of Internal Medicine, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
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de Vries TP, Pires AM, Diniz KGD, Chagas ALS, Vieira DA, Kakehasi AM, Suen VMM, Bering T, Colosimo EA, Rocha GA, de Paula Farah K, Silva LD. Agreement and diagnostic differences among three definitions of sarcopenia in patients with chronic hepatitis C. Nutr Clin Pract 2024; 39:568-578. [PMID: 38445969 DOI: 10.1002/ncp.11141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 01/27/2024] [Accepted: 02/04/2024] [Indexed: 03/07/2024] Open
Abstract
BACKGROUND There is neither a gold standard definition nor a universal consensus to diagnose sarcopenia in patients with chronic hepatitis C. Thus, we aimed to compare the prevalence of sarcopenia and the agreement and discrepancies between European Working Group on Sarcopenia in Older People (EWGSOP1), EWGSOP2, and Foundation for the National Institutes of Health Biomarkers Consortium Sarcopenia Project (FNIH) definitions in chronic hepatitis C. METHODS Dual-energy x-ray absorptiometry was used to assess muscle mass by quantifying appendicular lean mass (ALM) adjusted for squared height (ALM/ht2) or for body mass index (ALMBMI). Muscle function was evaluated by handgrip strength. Subjective Global Assessment was used to assess the nutrition status. RESULTS This cross-sectional study included 103 outpatients (mean age, 50.6 ± 11.3 years; 33.0% with compensated cirrhosis). Sarcopenia prevalence was 8.7%, 9.7%, and 9.7%, according to EWGSOP1, EWGSOP2, and FNIH definitions, respectively. There was neither a sex- nor a liver disease severity-specific difference in the prevalence of sarcopenia between the criteria applied. Sixteen (15.5%) patients fulfilled at least one of these criteria, and 3 out of 16 (18.8%) simultaneously had sarcopenia by consensus of the three criteria. Sarcopenic obesity was identified in 9 out of 16 (56.3%) patients, and 6 out of 9 (66.7%) of these only met FNIH consensus. CONCLUSIONS In patients without cirrhosis or with compensated cirrhosis, and with chronic hepatitis C, the agreement between EWGSOP1 and EWGSOP2 classifications was substantial for sarcopenia diagnosis. Concerning EWGSOP and FNIH criteria, a fair agreement and limited overlap were found in these patients.
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Affiliation(s)
- Thais Pontello de Vries
- Sciences Applied to Adult Health Care Post-Graduate Programme, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Aline Marcos Pires
- Sciences Applied to Adult Health Care Post-Graduate Programme, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Kiara Gonçalves Dias Diniz
- Sciences Applied to Adult Health Care Post-Graduate Programme, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | | | - Diego Alves Vieira
- Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Adriana Maria Kakehasi
- Locomotor System Department, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Vivian Marques Miguel Suen
- Laboratório de Estudos em Nutrição, Neurociências e Metabolismo (LANNEM), Department of Internal Medicine, Division of Nutrology, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil
| | - Tatiana Bering
- Department of Food and Nutrition, Universidade Federal de Mato Grosso (UFMT), Cuiabá, Mato Grosso, Brazil
| | - Enrico Antonio Colosimo
- Department of Statistics, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Gifone Aguiar Rocha
- Laboratory of Research in Bacteriology, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Kátia de Paula Farah
- Department of Internal Medicine, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Luciana Diniz Silva
- Sciences Applied to Adult Health Care Post-Graduate Programme, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
- Department of Internal Medicine, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
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Coelho MPP, de Vries TP, Pires AM, Parreira MP, de Alvarenga ÉR, Cambraia RD, Dos Santos RR, Bezerra JMT, Colosimo EA, Rocha GA, Silva LD. Editorial: Hepatitis C virus eradication improves skeletal muscle mass-Authors' reply. Aliment Pharmacol Ther 2024; 59:1448-1450. [PMID: 38711360 DOI: 10.1111/apt.18005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
LINKED CONTENTThis article is linked to Coelho et al papers. To view these articles, visit https://doi.org/10.1111/apt.17950 and https://doi.org/10.1111/apt.17978
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Affiliation(s)
- Marta Paula Pereira Coelho
- Sciences Applied to Adult Health Care Post-Graduate Programme, Department of Internal Medicine, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
- Outpatient Clinic of Viral Hepatitis, Department of Internal Medicine, Instituto Alfa de Gastroenterologia, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Thais Pontello de Vries
- Sciences Applied to Adult Health Care Post-Graduate Programme, Department of Internal Medicine, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
- Outpatient Clinic of Viral Hepatitis, Department of Internal Medicine, Instituto Alfa de Gastroenterologia, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Aline Marcos Pires
- Sciences Applied to Adult Health Care Post-Graduate Programme, Department of Internal Medicine, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
- Outpatient Clinic of Viral Hepatitis, Department of Internal Medicine, Instituto Alfa de Gastroenterologia, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Milena Pereira Parreira
- Medical Undergraduate Student, Department of Internal Medicine, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Érika Ramos de Alvarenga
- Department of Statistics, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Rodrigo Dias Cambraia
- Outpatient Clinic of Viral Hepatitis, Department of Internal Medicine, Instituto Alfa de Gastroenterologia, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Rodrigo Ribeiro Dos Santos
- Department of Internal Medicine, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Juliana Maria Trindade Bezerra
- Biological Sciences Degree Course, Department of Biological Sciences, Universidade Estadual do Maranhão (UEMA), Lago da Pedra, Brazil
- Animal Science Post-Graduate Programme, Department of Biological Sciences, Universidade Estadual do Maranhão (UEMA), São Luís, Brazil
- Parasitology Post-Graduate Programme, Department of Parasitology, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Enrico Antonio Colosimo
- Department of Statistics, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Gifone Aguiar Rocha
- Laboratory of Research in Bacteriology, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Luciana Diniz Silva
- Sciences Applied to Adult Health Care Post-Graduate Programme, Department of Internal Medicine, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
- Outpatient Clinic of Viral Hepatitis, Department of Internal Medicine, Instituto Alfa de Gastroenterologia, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- Department of Internal Medicine, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
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Pires AM, Carvalho L, Santos AC, Vilaça AM, Coelho AR, Fernandes F, Moreira L, Lima J, Vieira R, Ferraz MJ, Silva M, Silva P, Matias R, Zorro S, Costa S, Sarandão S, Barros AF. Radiotherapy skin marking with lancets versus electric marking pen - Comfort, satisfaction, effectiveness and cosmesis results from the randomized, double-blind COMFORTATTOO trial. Radiography (Lond) 2023; 29:171-177. [PMID: 36410128 DOI: 10.1016/j.radi.2022.10.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 10/13/2022] [Accepted: 10/28/2022] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Set-up skin markings are performed, in several centers, for radiotherapy (RT) treatments. This study aimed to compare two permanent methods: lancets and an electric marking pen, the Comfort Marker 2.0® (CM). METHODS This was a prospective, unicentric, randomized study. Patients aged 18 years or older referred to our department to receive RT were recruited. Patients were randomly assigned, in a 1:1 ratio, to receive set-up markings using lancets or CM. The markings arrangement followed our departmental protocols. The coprimary endpoints were patients' comfort and effectiveness. Secondary endpoints included radiation therapists (RTTs) satisfaction and cosmesis. RESULTS Between October 2021 and January 2022, 100 patients were enrolled (50 received lancets and 50 CM) and assessed for the comfort and satisfaction outcomes. CM was significantly less painful than the lancets, with 44% and 16% of the patients, respectively, considering the tattooing process painless (RR = 2.75; 95% IC: 1.36 - 5.58). On the RTT-reported satisfaction, CM had significantly easier processes than lancets (98.0% vs. 78.0%, respectively; RR = 1.26; 95% CI: 1.08 - 1.46). For effectiveness and cosmesis assessment, 98 patients were analyzed (48 received lancets and 50 CM). Patients receiving CM had a significantly higher proportion of markings graded as good and excellent compared to those receiving lancets (98.0% and 50.0%, respectively, had ≥75% of the tattoos assessed as good/excellent, RR = 1.96; 95% CI: 1.47 - 2.61). On the cosmetic evaluation, patients receiving CM had significantly better cosmetic markings, with a median score of 4.4 (vs. 3.5 for lancets, p <0.001). CONCLUSION The trial results demonstrated that tattooing with the CM is significantly less painful, more effective, easier to apply, and cosmetically superior to tattooing with lancets. IMPLICATIONS FOR PRACTICE Tattooing with CM allows for better results regarding pain, quality, ease and cosmesis.
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Affiliation(s)
- A M Pires
- Radiation Oncology Department, Portuguese Institute of Oncology of Porto, R. Dr. António Bernardino de Almeida 865, 4200-072, Porto, Portugal.
| | - L Carvalho
- Radiation Oncology Department, Portuguese Institute of Oncology of Porto, R. Dr. António Bernardino de Almeida 865, 4200-072, Porto, Portugal
| | - A C Santos
- Radiation Oncology Department, Portuguese Institute of Oncology of Porto, R. Dr. António Bernardino de Almeida 865, 4200-072, Porto, Portugal
| | - A M Vilaça
- Radiation Oncology Department, Portuguese Institute of Oncology of Porto, R. Dr. António Bernardino de Almeida 865, 4200-072, Porto, Portugal
| | - A R Coelho
- Radiation Oncology Department, Portuguese Institute of Oncology of Porto, R. Dr. António Bernardino de Almeida 865, 4200-072, Porto, Portugal
| | - F Fernandes
- Radiation Oncology Department, Portuguese Institute of Oncology of Porto, R. Dr. António Bernardino de Almeida 865, 4200-072, Porto, Portugal
| | - L Moreira
- Radiation Oncology Department, Portuguese Institute of Oncology of Porto, R. Dr. António Bernardino de Almeida 865, 4200-072, Porto, Portugal
| | - J Lima
- Radiation Oncology Department, Portuguese Institute of Oncology of Porto, R. Dr. António Bernardino de Almeida 865, 4200-072, Porto, Portugal
| | - R Vieira
- Radiation Oncology Department, Portuguese Institute of Oncology of Porto, R. Dr. António Bernardino de Almeida 865, 4200-072, Porto, Portugal
| | - M J Ferraz
- Radiation Oncology Department, Portuguese Institute of Oncology of Porto, R. Dr. António Bernardino de Almeida 865, 4200-072, Porto, Portugal
| | - M Silva
- Radiation Oncology Department, Portuguese Institute of Oncology of Porto, R. Dr. António Bernardino de Almeida 865, 4200-072, Porto, Portugal
| | - P Silva
- Radiation Oncology Department, Portuguese Institute of Oncology of Porto, R. Dr. António Bernardino de Almeida 865, 4200-072, Porto, Portugal
| | - R Matias
- Radiation Oncology Department, Portuguese Institute of Oncology of Porto, R. Dr. António Bernardino de Almeida 865, 4200-072, Porto, Portugal
| | - S Zorro
- Radiation Oncology Department, Portuguese Institute of Oncology of Porto, R. Dr. António Bernardino de Almeida 865, 4200-072, Porto, Portugal
| | - S Costa
- Radiation Oncology Department, Portuguese Institute of Oncology of Porto, R. Dr. António Bernardino de Almeida 865, 4200-072, Porto, Portugal
| | - S Sarandão
- Radiation Oncology Department, Portuguese Institute of Oncology of Porto, R. Dr. António Bernardino de Almeida 865, 4200-072, Porto, Portugal
| | - A F Barros
- Radiation Oncology Department, Portuguese Institute of Oncology of Porto, R. Dr. António Bernardino de Almeida 865, 4200-072, Porto, Portugal
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Gese TMD, May ABM, Pires AM, Queiroz FFL, Santos IPD, Higashi M, Mattos ER, Garcia MM, Campoó IMRM. INFILTRAÇÃO MEDULAR POR LEUCEMIA MIELOIDE AGUDA (LMA) E TUMOR SÓLIDO (TS) METASTÁTICO: RELATO DE CASO. Hematol Transfus Cell Ther 2022. [DOI: 10.1016/j.htct.2022.09.330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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May ABM, Pires AM, Gese TMD, Queiroz FFL, Santos IPD, Marotti ALMZ, Higashi M, Mattos ER. MIELOMA MÚLTIPLO REFRATÁRIO EVOLUINDO COM INFILTRAÇÃO EM SISTEMA NERVOSO CENTRAL: RELATO DE UM CASO. Hematol Transfus Cell Ther 2022. [DOI: 10.1016/j.htct.2022.09.448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Lourenço VM, Rodrigues PC, Pires AM, Piepho HP. A robust DF-REML framework for variance components estimation in genetic studies. Bioinformatics 2018; 33:3584-3594. [PMID: 29036274 DOI: 10.1093/bioinformatics/btx457] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 07/13/2017] [Indexed: 11/12/2022] Open
Abstract
Motivation In genetic association studies, linear mixed models (LMMs) are used to test for associations between phenotypes and candidate single nucleotide polymorphisms (SNPs). These same models are also used to estimate heritability, which is central not only to evolutionary biology but also to the prediction of the response to selection in plant and animal breeding, as well as the prediction of disease risk in humans. However, when one or more of the underlying assumptions are violated, the estimation of variance components may be compromised and therefore so may the estimates of heritability and any other functions of these. Considering that datasets obtained from real life experiments are prone to several sources of contamination, which usually induce the violation of the assumption of the normality of the errors, a robust derivative-free restricted-maximum likelihood framework (DF-REML) together with a robust coefficient of determination are proposed for the LMM in the context of genetic studies of continuous traits. Results The proposed approach, in addition to the robust estimation of variance components and robust computation of the coefficient of determination, allows in particular for the robust estimation of SNP-based heritability by reducing the bias and increasing the precision of its estimates. The performance of both classical and robust DF-REML approaches is compared via a Monte Carlo simulation study. Additionally, three examples of application of the methodologies to real datasets are given in order to validate the usefulness of the proposed robust approach. Although the main focus of this article is on plant breeding applications, the proposed methodology is applicable to both human and animal genetic studies. Availability and implementation Source code implemented in R is available in the Supplementary Material. Contact vmml@fct.unl.pt. Supplementary information Supplementary data are available at Bioinformatics online.
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Affiliation(s)
- V M Lourenço
- Centre for Mathematics and Applications (CMA) and Department of Mathematics, FCT - NOVA University of Lisbon, Lisbon, Portugal
| | - P C Rodrigues
- Department of Statistics, Federal University of Bahia, Bahia, Brazil.,CAST, Faculty of Natural Sciences, University of Tampere, Tampere, Finland
| | - A M Pires
- Center for Computational and Stochastic Mathematics (CEMAT) and Department of Mathematics, IST - University of Lisbon, Lisbon, Portugal
| | - H-P Piepho
- Biostatistics Unit, Institute of Crop Science, University of Hohenheim, Stuttgart, Germany
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Abstract
MOTIVATION It is well known that data deficiencies, such as coding/rounding errors, outliers or missing values, may lead to misleading results for many statistical methods. Robust statistical methods are designed to accommodate certain types of those deficiencies, allowing for reliable results under various conditions. We analyze the case of statistical tests to detect associations between genomic individual variations (SNP) and quantitative traits when deviations from the normality assumption are observed. We consider the classical analysis of variance tests for the parameters of the appropriate linear model and a robust version of those tests based on M-regression. We then compare their empirical power and level using simulated data with several degrees of contamination. RESULTS Data normality is nothing but a mathematical convenience. In practice, experiments usually yield data with non-conforming observations. In the presence of this type of data, classical least squares statistical methods perform poorly, giving biased estimates, raising the number of spurious associations and often failing to detect true ones. We show through a simulation study and a real data example, that the robust methodology can be more powerful and thus more adequate for association studies than the classical approach. AVAILABILITY The code of the robustified version of function lmekin() from the R package kinship is provided as Supplementary Material.
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Affiliation(s)
- V M Lourenço
- Department of Mathematics, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.
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Cavaglia F, Pires AM, Arriaga F. [Anticipation and quality of life in depression: 2 cognitive concepts?]. ACTA MEDICA PORT 2001; 14:473-8. [PMID: 11878157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
This study purports to investigate the relation between negative predictions and quality of life occurring in dysthymia and non-melancholic depression according DSM-IV, in the absence of any personality disorders. The relation between anticipation and quality of life (QoL) is also examined. The results suggest that both anticipatory cognitions and the QoL discriminate the two depressive entities and may have some nosological prediction potential. It is curious to observe the similar behaviour of the two concepts, anticipation and QoL, when implemented with the chosen scales. Moreover, their strong mutual correlation suggests a conceptual proximity or even a concurrent criteria validity. In conclusion, the possibility that both concepts belong to a cognitive sphere should not be ruled out.
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Affiliation(s)
- F Cavaglia
- Serviço de Psiquiatria, Hospital de Santa Maria, Lisboa
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Abstract
The capacity of a given natural ecosystem to provide certain goods and services that satisfy human needs depends on its environmental characteristics (natural processes and components). It was described the availability of these goods and services (environmental functions) controlled and sustained by ecological processes operating in Ecological Station of Jataí (Luiz Antônio, SP). The environmental functions identified were grouped in four main categories. To make environmental values an integrated factor in planning and decision making it was assessed their socio-economic importance in qualitative terms and, if possible their monetary value. The combined potential annual return from identified functions of Ecological Station of Jataí is at least US$ 708.83/ha/year. In comparison to calculations made for other natural ecosystems this is a rather moderate estimate. The Ecological Station of Jataí is poorly protected and managed, it too is still threatened by human activity (agriculture) and many development plans. Although present day market economics do not recognize the monetary value of most environmental functions, such calculations do provide a revealing insight into the great socio-economic importance of Ecological Station of Jataí. More awareness of these values may provide an important incentive for their preservation and sustainable use.
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Affiliation(s)
- J E Santos
- PPG-ERN, UFSCar, São Carlos, SP, Brazil.
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Arriaga F, Cavaglia F, Pires AM, Lam E, Paiva T. Effects of trazodone on insomnia and anxiety in depressed patients: a clinical and sleep EEG study. Int J Psychiatry Clin Pract 1997; 1:281-6. [PMID: 24946195 DOI: 10.3109/13651509709024740] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Clinical and sleep EEG effects of trazodone in major depression were investigated using a 5-week single-blind study design. Nine patients with DSM-N major depression were selected. Trazodone (50-250 mg) was given following a 2-week placebo run-in period. Both sleep and psychiatric evaluations were performed at different time points. Early and persistent sleep-inducing effects were detected, including the improvement of objective insomnia features and increased amounts of slow wave sleep. However, no significant changes of REM sleep measures were found. The sleep EEG changes seem to be related to the clinical improvement of both anxiety and insomnia, but there is no apparent relationship with the antidepressant action, which occurs at a later stage of the treatment. Trazodone may be useful in depressed patients, either as a hypnotic-like agent or as an effective antidepressant drug with beneficial effects on sleep.
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Affiliation(s)
- F Arriaga
- Department of Psychiatry, Faculty of Medicine of Lisbon, Hospital de Santa Maria, Lisbon, Portugal
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Pires AM, Reis AG, Grisi SJ. [Psoas muscular abscess in children]. J Pediatr (Rio J) 1996; 72:263-6. [PMID: 14688940 DOI: 10.2223/jped.632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Symptoms of psoas muscular abscess in children are nonspecific and differential diagnosis is made among diseases included in childreńs acute hip pain syndrome, imaging tests being necessary for diagnostic confirmation. During the first semester of 1995, 48,550 children were examined in Pronto Socorro do Instituto da Criança do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, four of them diagnosed as having psoas muscular abscess (2 females and 2 males, ages varying from 1 to 12 years). All of them had nonspecific clinical features and diagnosis was confirmed by abdominal ultrasound and/or computerized tomography. Staphylococcus aureus was isolated as the etiologic agent in 3 children, findings similar to the ones in literature.
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Affiliation(s)
- A M Pires
- Complementação Especializada na Area de Emergência, Instituto da Criança, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, SP
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de Carvalho L, Pires AM, Vaz A. [Intracranial abscesses]. ACTA MEDICA PORT 1980; 2:391-400. [PMID: 7293815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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