SANDRA REGINA MIYOSHI LOPES
Projetos de Pesquisa
Unidades Organizacionais
LIM/17 - Laboratório de Investigação em Reumatologia, Hospital das Clínicas, Faculdade de Medicina
4 resultados
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- Risk factors for mortality in 1528 Brazilian childhood-onset systemic lupus erythematosus patients(2023) SAKAMOTO, Ana P.; SILVA, Clovis A.; PITA, Ana C.; TRINDADE, Vitor C.; ISLABAO, Aline G.; FIOROT, Fernanda J.; LOPES, Sandra R. M.; PEREIRA, Rosa M. R.; SAAD-MAGALHAES, Claudia; RUSSO, Gleice C. S.; LEN, Claudio A.; PRADO, Rogerio do; CAMPOS, Lucia M. A.; AIKAWA, Nadia E.; APPENZELLER, Simone; FERRIANI, Virginia P. L.; SILVA, Marco F.; FELIX, Marta; FONSECA, Adriana R.; ASSAD, Ana P. L.; SZTAJNBOK, Flavio R.; SANTOS, Maria C.; BICA, Blanca E.; SENA, Evaldo G.; MORAES, Ana J.; FRAGA, Melissa M.; ROBAZZI, Teresa C.; SPELLING, Paulo F.; SCHEIBEL, Iloite M.; CAVALCANTI, Andre S.; MATOS, Erica N.; GUIMARAES, Luciano J.; SANTOS, Flavia P.; MOTA, Licia M. H.; BONFA, Eloisa; TERRERI, Maria T.Objectives: To identify associations between mortality in cSLE patients and their characteristics: clinical and laboratory features, disease activity and damage scores, and treatment; to evaluate risk factors associated with mortality in cSLE; and to determine the most frequent causes of death in this group of patients.Methods: We performed a multicenter retrospective cohort using data from 1,528 cSLE patients followed in 27 pediatric rheumatology tertiary centers in Brazil. Patients' medical records were reviewed according to a standardized protocol, in which information regarding demographic and clinical features, disease activity and damage scores, and treatment were collected and compared between deceased cSLE patients and survivors. Univariate and multivariate analyses by Cox regression model were used to calculate risk factors for mortality, whereas survival rates were analyzed by Kaplan-Meier plots.Results: A total of 63/1,528 (4.1%) patients deceased, 53/63 were female (84.1%), median age at death was 11.9 (9.4-13.1) years and median time interval between cSLE diagnosis and death was 3.2 (0.5-5.3) years. Sepsis was the main cause of death in 27/63 (42.8%) patients, followed by opportunistic infections in 7/63 (11.1%), and alveolar hemorrhage in 6/63 (9.5%) patients. The regression models resulted in neuropsychiatric lupus (NP-SLE) (HR = 2.56, 95% CI = 1.48-4.42) and chronic kidney disease (CKD) (HR = 4.33, 95% CI = 2.33-4.72), as risk factors significantly associated with mortality. Overall patient survival after cSLE diagnosis at 5, 10, and 15 years were 97%, 95.4%, and 93.8%, respectively.Conclusions: This study confirmed that the recent mortality rate in cSLE in Brazil is low, but still of concern. NP-SLE and CKD were the main risk factors for mortality, indicating that the magnitude of these manifestations was significantly high.
- Outcomes of 847 childhood-onset systemic lupus erythematosus patients in three age groups(2017) LOPES, S. R. M.; GORMEZANO, N. W. S.; GOMES, R. C.; AIKAWA, N. E.; PEREIRA, R. M. R.; TERRERI, M. T.; MAGALHAES, C. S.; FERREIRA, J. C.; OKUDA, E. M.; SAKAMOTO, A. P.; SALLUM, A. M. E.; APPENZELLER, S.; FERRIANI, V. P. L.; BARBOSA, C. M.; LOTUFO, S.; JESUS, A. A.; ANDRADE, L. E. C.; CAMPOS, L. M. A.; BONFA, E.; SILVA, C. A.Objective The objective of this study was to assess outcomes of childhood systemic lupus erythematosus (cSLE) in three different age groups evaluated at last visit: group A early-onset disease (<6 years), group B school age (6 and <12 years) and group C adolescent (12 and <18 years). Methods An observational cohort study was performed in ten pediatric rheumatology centers, including 847 cSLE patients. Results Group A had 39 (4%), B 395 (47%) and C 413 (49%). Median disease duration was significantly higher in group A compared to groups B and C (8.3 (0.1-23.4) vs 6.2 (0-17) vs 3.3 (0-14.6) years, p<0.0001). The median Systemic Lupus International Collaborating Clinics/American College of Rheumatology Damage Index (SLICC/ACR-DI) (0 (0-9) vs 0 (0-6) vs 0 (0-7), p=0.065) was comparable in the three groups. Further analysis of organ/system damage revealed that frequencies of neuropsychiatric (21% vs 10% vs 7%, p=0.007), skin (10% vs 1% vs 3%, p=0.002) and peripheral vascular involvements (5% vs 3% vs 0.3%, p=0.008) were more often observed in group A compared to groups B and C. Frequencies of severe cumulative lupus manifestations such as nephritis, thrombocytopenia, and autoimmune hemolytic anemia were similar in all groups (p>0.05). Mortality rate was significantly higher in group A compared to groups B and C (15% vs 10% vs 6%, p=0.028). Out of 69 deaths, 33/69 (48%) occurred within the first two years after diagnosis. Infections accounted for 54/69 (78%) of the deaths and 38/54 (70%) had concomitant disease activity. Conclusions This large multicenter study provided evidence that early-onset cSLE group had distinct outcomes. This group was characterized by higher mortality rate and neuropsychiatric/vascular/skin organ damage in spite of comparable frequencies of severe cumulative lupus manifestations. We also identified that overall death in cSLE patients was an early event mainly attributed to infection associated with disease activity.
- The use of deep learning state-of-the-art architectures for oral epithelial dysplasia grading: A comparative appraisal(2023) ARAUJO, Anna Luiza Damaceno; SILVA, Viviane Mariano da; MORAES, Matheus Cardoso; AMORIM, Henrique Alves de; FONSECA, Felipe Paiva; ST'ANA, Maria Sissa Pereira; MESQUITA, Ricardo Alves; MARIZ, Bruno Augusto Linhares Almeida; PONTES, Helder Antonio Rebelo; SOUZA, Lucas Lacerda de; SALDIVIA-SIRACUSA, Cristina; KHURRAM, Syed Ali; PEARSON, Alexander T.; MARTINS, Manoela Domingues; LOPES, Marcio Ajudarte; VARGAS, Pablo Agustin; KOWALSKI, Luiz Paulo; SANTOS-SILVA, Alan RogerBackground: Dysplasia grading systems for oral epithelial dysplasia are a source of disagreement among pathologists. Therefore, machine learning approaches are being developed to mitigate this issue.Methods: This cross-sectional study included a cohort of 82 patients with oral potentially malignant disorders and correspondent 98 hematoxylin and eosin-stained whole slide images with biopsied-proven dysplasia. All whole-slide images were manually annotated based on the binary system for oral epithelial dysplasia. The annotated regions of interest were segmented and fragmented into small patches and non-randomly sampled into training/validation and test subsets. The training/validation data were color augmented, resulting in a total of 81,786 patches for training. The held-out independent test set enrolled a total of 4,486 patches. Seven state-of-the-art convolutional neural networks were trained, validated, and tested with the same dataset.Results: The models presented a high learning rate, yet very low generalization potential. At the model development, VGG16 performed the best, but with massive overfitting. In the test set, VGG16 presented the best accuracy, sensitivity, specificity, and area under the curve (62%, 62%, 66%, and 65%, respectively), associated with the higher loss among all Convolutional Neural Networks (CNNs) tested. EfficientB0 has comparable metrics and the lowest loss among all convolutional neural networks, being a great candidate for further studies.Conclusion: The models were not able to generalize enough to be applied in real-life datasets due to an overlapping of features between the two classes (i.e., high risk and low risk of malignization).
conferenceObject Outcome of 847 Childhood-Onset Systemic LUPUS Erythematousus Patients in Three Age Groups(2016) LOPES, Sandra R. M.; GORMEZANO, Natali W.; SR., Roberta C. Gomes; AIKAWA, Nadia E.; PEREIRA, Rosa M. R.; TERRERI, Maria Teresa; MAGALHAES, Claudia S.; OKUDA, Eunice M.; SAKAMOTO, Ana Paula; SALLUM, Adriana M. E.; APPENZELLER, Simone; FERRIANI, Virginia; BARBOSA, Cassia M.; LOTUFO, Simone; JESUS, Adriana A.; ANDRADE, Luis E. C.; CAMPOS, Lucia M. A.; BONFA, Eloisa; SILVA, Clovis A.