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3.
J Cancer Surviv ; 16(6): 1401-1413, 2022 12.
Artigo em Inglês | MEDLINE | ID: mdl-34735695

RESUMO

PURPOSE: Distress screening has become mandatory and essential in comprehensive cancer care. We evaluated an electronic psycho-oncological adaptive screening (EPAS) which assesses objective indicators of care needs and subjectively perceived care needs and subsequently provides patient feedback with individualized recommendations about psychosocial care services. METHODS: Patients were assessed within clusters, i.e., different oncological facilities of the competence network of the University Cancer Center Hamburg (UCCH). Patients in the intervention arm underwent the screening, controls received standard care. Patients were assessed at baseline (t0), 3-month (t1), and 6-month (t2) follow-up. Outcomes included information level and use of/access to nine psychosocial services at UCCH, well-being (GAD-7, PHQ-9, SF-8), and treatment satisfaction (SCCC). Conditional linear and logistic regressions were used to identify screening effects at t1 and t2. RESULTS: Of 1320 eligible patients across 11 clusters, 660 were included (50%). The average age was 60 years; 46% were female. The intervention was associated with increased information level for all psychosocial services at t1 and t2 (all p < .001), increased use in some of these services at t1 and t2, respectively (p ≤ .02), and better evaluation of access (e.g., more recommendations for services provided by physicians, p < .01). At t2, the intervention was associated with a lower level of satisfaction with disease-related information (p = .02). CONCLUSIONS: EPAS may improve information about psychosocial services as well as utilization of and access to these services. The effect on information level seems not to be generalizable to other aspects of oncological care. Future studies should incorporate novel technologies and condense the procedure to its core factors. IMPLICATIONS FOR CANCER SURVIVORS: The screening may help to enhance self-management competencies among cancer survivors. TRIAL REGISTRATION: The trial was retrospectively registered (2/2021) at ClinicalTrials.gov (number: NCT04749056).


Assuntos
Sobreviventes de Câncer , Neoplasias , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Eletrônica , Retroalimentação , Neoplasias/complicações , Psico-Oncologia
4.
Oncotarget ; 10(40): 4026-4037, 2019 Jun 18.
Artigo em Inglês | MEDLINE | ID: mdl-31258847

RESUMO

Objective: Better tools are needed for early diagnosis and classification of pancreatic cystic lesions (PCL) to trigger intervention before neoplastic precursor lesions progress to adenocarcinoma. We evaluated the capacity of molecular analysis to improve the accuracy of cytologic diagnosis for PCL with an emphasis on non-diagnostic/negative specimens. Design: In a span of 7 years, at a tertiary care hospital, 318 PCL endoscopic ultrasound-guided fine needle aspirations (EUS-FNA) were evaluated by cytologic examination and molecular analysis. Mucinous PCL were identified based on a clinical algorithm and 46 surgical resections were used to verify this approach. The mutation allele frequency (MAF) of commonly altered genes (BRAF, CDKN2A, CTNNB1, GNAS, RAS, PIK3CA, PTEN, SMAD4, TP53 and VHL) was evaluated for their ability to identify and grade mucinous PCL. Results: Cytology showed a diagnostic sensitivity of 43.5% for mucinous PCL due in part to the impact of non-diagnostic (28.8%) and negative (50.5%) specimens. Incorporating an algorithmic approach or molecular analysis markedly increased the accuracy of cytologic evaluation. Detection of mucinous PCL by molecular analysis was 93.3% based on the detection of KRAS and/or GNAS gene mutations (p = 0.0001). Additional genes provided a marginal improvement in sensitivity but were associated with cyst type (e.g. VHL) and grade (e.g. SMAD4). In the surgical cohort, molecular analysis and the proposed algorithm showed comparable sensitivity (88.9% vs. 100%). Conclusions: Incorporating somatic molecular analysis in the cytologic evaluation of EUS-FNA increases diagnostic accuracy for detection, classification and grading of PCL. This approach has the potential to improve patient management.

5.
Urol Case Rep ; 24: 100847, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-31211058

RESUMO

Paragangliomas are rare extra-adrenal neuroendocrine tumors and presentation within the scrotum is exceedingly rare. Only thirteen other cases have been reported in medical literature, with only one other case presenting within the testicle itself. We present the second known case of paraganglioma of the testicle in a patient who initially presented with a two-week history of right testicular pain with no associated dysuria and hematuria. Ultrasound imaging indicated a solid heterogenous mass in the right testicle concerning for malignancy and was treated surgically with right radical orchiectomy. Gross and histological investigation demonstrated a morphology and immunophenotype consistent with a paraganglioma.

6.
Front Pediatr ; 7: 17, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30805321

RESUMO

Introduction: The improvement-or at least maintenance-of health-related quality of life (HRQoL) in children and adolescents is one of the main aims of chronic disease care. This study examines HRQoL of children and adolescents with three different chronic conditions (i.e., diabetes mellitus, asthma, juvenile arthritis) using the computer-adaptive test Kids-CAT, comprising five HRQoL domains: physical well-being, psychological well-being, parent relations, social support and peers, and school well-being. Further, associations between HRQoL and distinct clinical data and medical assessments are investigated to explore how much variability of the five domains can be explained by these variables. Methods: Cross-sectional data of the Kids-CAT study was analyzed. The Kids-CAT was used in two outpatient clinics in northern Germany gathering data on self-reported HRQoL in n = 309 children and adolescents aged 7-17 years. Additionally, general patient information, clinical data, and pediatrician-reported medical assessments were measured. Multiple regression analyses were conducted to explore associations between HRQoL and selected variables (i.e., disease duration, co-morbidity, disease control, overall health status). Results: Overall, self-reported HRQoL in all five domains were comparable to data of an age- and sex-matched reference population. Results of regression analyses indicated that the investigated variables only minimally explain variance in the five Kids-CAT domains. Sociodemographic, clinical data, and medical assessments explained 18.4% of the variance in physical well-being, 10.7% in psychological well-being, and < 10% of the variance in parent relations, social support and peers, and school well-being. Conclusion: Sociodemographic data, disease duration, co-morbidity, and medical assessments, such as disease control or pediatrician-assessed overall health status show low association with HRQoL of children and adolescents with chronic conditions. Data on self-reported HRQoL delivers valuable information on children's well-being and can improve healthcare professionals' understanding of the subjective well-being of their young patients. The implementation of tools like the Kids-CAT can facilitate the identification of potential problem areas, which should enable healthcare professionals to better address specific healthcare needs. Clinical Trial Registration: identifier: DRKS00006326 (retrospectively registered); Date of registry: August 1st, 2014.

7.
Hum Pathol ; 85: 260-269, 2019 03.
Artigo em Inglês | MEDLINE | ID: mdl-30458197

RESUMO

The eighth edition of American Joint Committee on Cancer (AJCC) advocates a 3-tier grading system for appendiceal mucinous tumors. The mutational profile for each tumor grade and the impact of TP53 mutation on survival are unknown. We classified appendiceal mucinous tumors into 3 grades based on the eighth edition of American Joint Committee on Cancer: 21 G1 low-grade mucinous neoplasms, 21 G2 appendiceal adenocarcinomas, and 26 G3 signet ring cell carcinomas. Mutation profiles were obtained using next-generation sequencing. The impact of TP53 on prognosis was investigated by multivariable analysis. Most G1 tumors harbor KRAS/GNAS mutations with TP53 and SMAD4 in a small subset of cases. G2 and G3 tumors show a more complex mutation pattern carrying PIK3CA, BRAF, or TP53 mutations in addition to KRAS/GNAS. PTEN mutations were detected exclusively in G2 tumors. The prevalence of KRAS and GNAS mutations is significantly lower in G3 tumors relative to G1/G2, whereas TP53, PIK3CA, or BRAF mutations are common. Mutations in NRAS, IDH2, CDH1, RB1, CTNNB1, CDKN2A, PTPN11, and KIT genes were observed in single cases. Patients with TP53-mutated disseminated G2 and G3 tumors had worse progression-free survival than did those with wild-type TP53 tumors (P = .0315). A trend toward worse overall survival was observed in TP53-mutated G3 tumors (P = .102). p53 expression correlated with mutation status. We demonstrate a distinct but overlapping pattern of gene mutations in each grade of appendiceal mucinous tumors and the independent impact of TP53 mutation on progression-free survival but not overall survival.


Assuntos
Adenocarcinoma Mucinoso/genética , Neoplasias do Apêndice/genética , Mutação , Proteína Supressora de Tumor p53/genética , Adenocarcinoma Mucinoso/mortalidade , Adenocarcinoma Mucinoso/patologia , Adulto , Idoso , Neoplasias do Apêndice/mortalidade , Neoplasias do Apêndice/patologia , Biomarcadores Tumorais , Classe I de Fosfatidilinositol 3-Quinases/genética , Análise Mutacional de DNA , Feminino , Sequenciamento de Nucleotídeos em Larga Escala , Humanos , Masculino , Pessoa de Meia-Idade , Gradação de Tumores , Estadiamento de Neoplasias , Prognóstico , Proteínas Proto-Oncogênicas p21(ras)/genética , Taxa de Sobrevida , beta Catenina/genética
8.
Front Pediatr ; 7: 566, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-32039122

RESUMO

Introduction: To achieve optimized blood glucose concentrations (assessed by HbA1c) and high health-related quality of life (HRQL), children and adolescents with diabetes mellitus type 1 (T1DM) must follow strict disease management strategies. This study aims to investigate HRQL of children and adolescents with T1DM and its association with HbA1c values over the course of 6 months. Methods: Patients aged 7-17 years (n = 203) with T1DM provided HRQL data on a monthly basis. HRQL was measured using the Kids-CAT, a computer-adaptive test (CAT) comprising five generic HRQL domains. HbA1c concentrations were assessed at baseline, at 3 and 6 months. We explored the trajectory of HRQL at the domain level using linear mixed effects models. Further, we investigated the association between HRQL and HbA1c concentrations over time using path analysis models. Results: Children and adolescents with T1DM reported high scores across all HRQL domains over time. However, those with an HbA1c concentrations of >9.0% reported significantly lower scores in physical well-being and parent relations compared with those with an HbA1c concentration of <7.5%. Path analysis models revealed a minimal temporal relationship between HbA1c and HRQL, with a small negative impact of HbA1c on physical well-being, psychological well-being and parent relations. Conclusion: Although observed HRQL of young patients with T1DM was comparable to age-related German-speaking reference population over the course of 6 months, those with an HbA1c concentration >9.0% reported lower scores in selected HRQL domains. Thus, special attention should be drawn to HRQL of children and adolescents with higher HbA1c concentrations. The minimal relationship between HbA1c and HRQL indicates that the two therapy goals, i.e., achievement and maintenance of glycemic targets and high HRQL, should be considered and evaluated independently in clinical routine. Trial Registration: DRKS00006326 (German Clinical Trial Register), date of registration: August 1st, 2014.

9.
J Clin Epidemiol ; 82: 94-102, 2017 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-27865902

RESUMO

OBJECTIVES: To compare treatment effect estimates obtained from a regression discontinuity (RD) design with results from an actual randomized controlled trial (RCT). STUDY DESIGN AND SETTING: Data from an RCT (EVIDENT), which studied the effect of an Internet intervention on depressive symptoms measured with the Patient Health Questionnaire (PHQ-9), were used to perform an RD analysis, in which treatment allocation was determined by a cutoff value at baseline (PHQ-9 = 10). A linear regression model was fitted to the data, selecting participants above the cutoff who had received the intervention (n = 317) and control participants below the cutoff (n = 187). Outcome was PHQ-9 sum score 12 weeks after baseline. Robustness of the effect estimate was studied; the estimate was compared with the RCT treatment effect. RESULTS: The final regression model showed a regression coefficient of -2.29 [95% confidence interval (CI): -3.72 to -.85] compared with a treatment effect found in the RCT of -1.57 (95% CI: -2.07 to -1.07). CONCLUSION: Although the estimates obtained from two designs are not equal, their confidence intervals overlap, suggesting that an RD design can be a valid alternative for RCTs. This finding is particularly important for situations where an RCT may not be feasible or ethical as is often the case in clinical research settings.


Assuntos
Transtorno Depressivo/terapia , Projetos de Pesquisa Epidemiológica , Psicoterapia/métodos , Ensaios Clínicos Controlados Aleatórios como Assunto/estatística & dados numéricos , Consulta Remota/métodos , Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Análise de Regressão , Reprodutibilidade dos Testes , Resultado do Tratamento
10.
J Am Soc Cytopathol ; 4(3): 113-121, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-31051691

RESUMO

INTRODUCTION: The goal of Barrett esophagus surveillance is to identify high-grade dysplasia (HGD) for eradication. Surveillance programs currently rely on limited histologic sampling; however, the role of cytology in this setting is not well studied. MATERIALS AND METHODS: From December 1, 2011 to March 30, 2014, 45 patients underwent 4 circumferential brushings of the distal tubular esophagus followed by standard 4-quadrant biopsies. One ThinPrep slide and 1 Cellient cellblock (Hologic, Boxborough, Mass) were prepared. Six cytopathologists evaluated each for adequacy, intestinal metaplasia (IM) and dysplasia. Findings were classified using the traditional 5-tier system used for biopsies. A prospectively modified 3-tier cytologic classification was also tested: negative for HGD, indeterminate for HGD, and HGD. Sensitivity, specificity, and kappa values (interobserver agreement) for cytology were calculated. RESULTS: Ten of 45 patients had nondiagnostic cytologies; none of whom had dysplasia on biopsy. Cytology had good sensitivity (82%) and specificity (88%) for identifying IM compared with biopsy with moderate interobserver agreement (pairwise average of Fleiss and Krippendorf kappa value = 0.589, 79% agreement). One case had IM on cytology not detected on histology. Six of 45 patients had dysplasia on biopsy including 1 intramucosal adenocarcinoma, 1 indeterminate for dysplasia, 2 high-grade dysplasias, and 2 low-grade dysplasias. A non-negative adequate cytology sample had a sensitivity of 100% and a specificity of 88% and 94% for the 5-tier and the 3-tier classification, respectively. CONCLUSIONS: Cytology appears to have good sensitivity and specificity for diagnosis of HGD, and cytology may be poised to synergize with advances in other techniques for management of patients with Barrett esophagus. Improvements in brushing devices may help to decrease the nondiagnostic rate.

11.
Surgery ; 156(5): 1225-31, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-25262218

RESUMO

BACKGROUND: Ischemia-reperfusion injury (IRI) of the liver is a well-known cause of morbidity and mortality after liver transplantation. Effective treatment strategies aimed at decreasing hepatic IRI injury and accelerating liver regeneration could offer major benefits in liver transplantation, especially in the case of partial allografts. Human adipose-derived mesenchymal stem cells (HADMSCs) are an attractive source for regenerative medicine because of their anti-inflammatory and regenerative properties. We hypothesized that HADMSCs attenuate IRI and promote liver regeneration. METHODS: Mice were subjected to 60 minutes of partial IRI with or without 70% partial hepatectomy. Animals were treated with HADMSCs. Liver IRI was evaluated with serum levels of alanine aminotransferase, serum interleukin-6, and histopathology. Liver samples were stained for specific markers of liver regeneration. RESULTS: Histology, serum interleukin-6, and alanine aminotransferase release revealed that treatment with HADMSCs attenuated liver injury compared with control patients. Improved animal survival and increased number of regenerating cells were observed in HADMSC-treated animals who underwent IRI and partial hepatectomy compared with the control group. CONCLUSION: HADMSC represents a potential therapeutic strategy to decrease IRI and promote regeneration in liver transplantation.


Assuntos
Regeneração Hepática , Transplante de Células-Tronco Mesenquimais , Traumatismo por Reperfusão/terapia , Tecido Adiposo/citologia , Animais , Células Cultivadas , Humanos , Fígado/irrigação sanguínea , Camundongos Endogâmicos C57BL
12.
J Surg Res ; 187(2): 660-6, 2014 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-24433870

RESUMO

Liver ischemia-reperfusion injury (IRI) is a well-known cause of morbidity and mortality after liver transplantation (LT). Activation of the complement system contributes to the pathogenesis of IRI. Effective treatment strategies aimed at reducing hepatic IRI and accelerating liver regeneration could offer major benefits in LT. Herein, we investigated the effect of C1-esterase inhibitor (human) [C1-INH] on IRI and liver regeneration. Mice were subjected to 60-min partial IRI, with or without 70% partial hepatectomy, or CCl4-induced acute liver failure. Before liver injury, the animals were pretreated with intravenous C1-INH or normal saline. Liver IRI was evaluated using serum levels of alanine aminotransferase, serum interleukin-6, and histopathology. Liver samples were stained for specific markers of regeneration (5-bromo-2'-deoxyuridine [BrdU] staining and proliferating cell nuclear antigen [PCNA]). Histology, serum interleukin-6, and alanine aminotransferase release revealed that C1-INH treatment attenuated liver injury compared with controls. Improved animal survival and increased number of BrdU- and PCNA-positive cells were observed in C1-INH-treated animals which underwent IRI + partial hepatectomy or CCl4 injection compared with control group. These data indicate that complement plays a key role in IRI and liver regeneration. C1-INH represents a potential therapeutic strategy to reduce IRI and promote regeneration in LT.


Assuntos
Proteína Inibidora do Complemento C1/farmacologia , Falência Hepática Aguda/tratamento farmacológico , Falência Hepática Aguda/etiologia , Regeneração Hepática/efeitos dos fármacos , Transplante de Fígado/efeitos adversos , Traumatismo por Reperfusão/tratamento farmacológico , Animais , Proteína Inibidora do Complemento C1/metabolismo , Complemento C3/genética , Hepatectomia/métodos , Humanos , Injeções Intravenosas , Fígado/efeitos dos fármacos , Fígado/fisiologia , Fígado/cirurgia , Falência Hepática Aguda/mortalidade , Regeneração Hepática/fisiologia , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Knockout , Traumatismo por Reperfusão/mortalidade , Traumatismo por Reperfusão/fisiopatologia , Receptor 4 Toll-Like/genética
13.
Int J Surg Pathol ; 21(6): 603-9, 2013 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-23842004

RESUMO

Recognition of an appendiceal diverticulum is important because of its association with an appendiceal neoplasm. The incidence of mucosal Schwann cell proliferation in 24 cases of appendiceal diverticular disease, 17 serrated polyps, 4 cases of mucosal hyperplasia, and 45 normal appendices was determined. Ten (42%) of 24 cases with diverticula, 2 (50%) of 4 cases of mucosal hyperplasia with concurrent surface low-grade dysplasia, and 9 (20%) of 45 cases of normal appendices showed mucosal Schwann cell proliferation. It was not seen within the 17 cases of serrated polyps. Mucosal Schwann cell proliferation is common in appendiceal diverticular disease and may serve as a histologic marker for the presence of an appendiceal diverticulum. Thus, when routine histologic sections of a removed appendix demonstrate Schwann cell proliferation, further examination of the specimen may detect possible coexisting diverticular disease, which in turn may be associated with appendiceal neoplasms and epithelial dysplasia.


Assuntos
Apêndice/patologia , Proliferação de Células , Divertículo/patologia , Enteropatias/patologia , Mucosa Intestinal/patologia , Células de Schwann/patologia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Neoplasias do Apêndice/patologia , Criança , Pré-Escolar , Feminino , Humanos , Hiperplasia/patologia , Imuno-Histoquímica , Lactente , Recém-Nascido , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Adulto Jovem
14.
Hum Pathol ; 40(11): 1528-33, 2009 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-19695680

RESUMO

IMP3, an oncofetal protein, is a member of the insulin-like growth factor-II (IGF-II) mRNA-binding protein family. Its relevance as a novel biomarker in lung, pancreatic, renal, and cervical adenocarcinoma was recently revealed. However, its role in breast carcinogenesis and tumor progression is not yet established. Basal-like carcinoma was initially identified by gene expression profiling. It accounts for 15% to 30% of all breast cancers. These tumors express basal epithelial markers including cytokeratin 5 but lack expression of the estrogen receptor, progesterone receptor, and human epidermal growth factor receptor 2 (HER2), therefore, are often referred to as triple negative breast cancer. They have been found to be associated with a worse overall and disease-free survival. In this retrospective study, we examined the IMP3 expression in invasive ductal carcinoma of the breast and correlated its expression with morphological and biologic prognostic factors. The study group comprised 138 cases of invasive ductal carcinoma retrieved from the surgical pathologic files for a 10-year period from 1997 to 2006. Survival data and clinical stage were available on all 138 patients. Tumor characteristics including size, grade, lymphovascular invasion, necrosis, lymph node metastasis, estrogen receptor, progesterone receptor, and HER2 status were obtained from pathologic reports. Immunohistochemistry was performed on formalin-fixed paraffin-embedded tissue using mouse monoclonal antibody against IMP3 and CK5/6. Of the 138 breast cancer cases, IMP3 expression was seen in 45 (33%). Twenty-five of the IMP3+ cases were triple negative. We found significant correlation between IMP3 expression and higher grade (P = .001), necrosis (P< .0001) triple negative, and CK5/6 expression (P < .0001 for each). Cox multivariate analysis showed a hazard ratio of IMP3 expression at 3.14 (P = .05). IMP3 is a novel biomarker for triple negative (basal-like) invasive mammary carcinoma, and its expression is associated with a more aggressive phenotype and decreased overall survival.


Assuntos
Neoplasias da Mama/patologia , Carcinoma Ductal de Mama/patologia , Proteínas de Neoplasias/biossíntese , Proteínas de Ligação a RNA/biossíntese , Adulto , Idoso , Idoso de 80 Anos ou mais , Biomarcadores Tumorais/análise , Neoplasias da Mama/metabolismo , Neoplasias da Mama/mortalidade , Carcinoma Ductal de Mama/metabolismo , Carcinoma Ductal de Mama/mortalidade , Intervalo Livre de Doença , Feminino , Humanos , Imuno-Histoquímica , Estimativa de Kaplan-Meier , Pessoa de Meia-Idade , Fenótipo , Receptor ErbB-2/biossíntese , Receptores de Estrogênio/biossíntese , Receptores de Progesterona/biossíntese , Estudos Retrospectivos
15.
Int J Methods Psychiatr Res ; 18(1): 23-36, 2009.
Artigo em Inglês | MEDLINE | ID: mdl-19194856

RESUMO

In the past, a German Computerized Adaptive Test, based on Item Response Theory (IRT), was developed for purposes of assessing the construct depression [Computer-adaptive test for depression (D-CAT)]. This study aims at testing the feasibility and validity of the real computer-adaptive application.The D-CAT, supplied by a bank of 64 items, was administered on personal digital assistants (PDAs) to 423 consecutive patients suffering from psychosomatic and other medical conditions (78 with depression). Items were adaptively administered until a predetermined reliability (r > or = 0.90) was attained. For validation purposes, the Hospital Anxiety and Depression Scale (HADS), the Centre for Epidemiological Studies Depression (CES-D) scale, and the Beck Depression Inventory (BDI) were administered. Another sample of 114 patients was evaluated using standardized diagnostic interviews [Composite International Diagnostic Interview (CIDI)].The D-CAT was quickly completed (mean 74 seconds), well accepted by the patients and reliable after an average administration of only six items. In 95% of the cases, 10 items or less were needed for a reliable score estimate. Correlations between the D-CAT and the HADS, CES-D, and BDI ranged between r = 0.68 and r = 0.77. The D-CAT distinguished between diagnostic groups as well as established questionnaires do.The D-CAT proved an efficient, well accepted and reliable tool. Discriminative power was comparable to other depression measures, whereby the CAT is shorter and more precise. Item usage raises questions of balancing the item selection for content in the future.


Assuntos
Sistemas Computacionais , Depressão/diagnóstico , Depressão/psicologia , Psicometria/métodos , Adolescente , Adulto , Idoso , Análise Discriminante , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Cooperação do Paciente , Psicometria/normas , Psicometria/estatística & dados numéricos , Reprodutibilidade dos Testes , Estudos Retrospectivos , Estatísticas não Paramétricas , Inquéritos e Questionários , Adulto Jovem
16.
J Clin Epidemiol ; 62(3): 278-87, 287.e1-3, 2009 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-18639439

RESUMO

OBJECTIVES: This study aimed to develop and evaluate a first computerized adaptive test (CAT) for the measurement of stress perception (Stress-CAT), in terms of the two dimensions: exposure to stress and stress reaction. STUDY DESIGN AND SETTING: Item response theory modeling was performed using a two-parameter model (Generalized Partial Credit Model). The evaluation of the Stress-CAT comprised a simulation study and real clinical application. A total of 1,092 psychosomatic patients (N1) were studied. Two hundred simulees (N2) were generated for a simulated response data set. Then the Stress-CAT was given to n=116 inpatients, (N3) together with established stress questionnaires as validity criteria. RESULTS: The final banks included n=38 stress exposure items and n=31 stress reaction items. In the first simulation study, CAT scores could be estimated with a high measurement precision (SE<0.32; rho>0.90) using 7.0+/-2.3 (M+/-SD) stress reaction items and 11.6+/-1.7 stress exposure items. The second simulation study reanalyzed real patients data (N1) and showed an average use of items of 5.6+/-2.1 for the dimension stress reaction and 10.0+/-4.9 for the dimension stress exposure. Convergent validity showed significantly high correlations. CONCLUSIONS: The Stress-CAT is short and precise, potentially lowering the response burden of patients in clinical decision making.


Assuntos
Diagnóstico por Computador , Qualidade da Assistência à Saúde/normas , Estresse Psicológico/diagnóstico , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Intervalos de Confiança , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Percepção , Reprodutibilidade dos Testes , Perfil de Impacto da Doença , Estresse Psicológico/psicologia , Inquéritos e Questionários , Resultado do Tratamento
17.
Depress Anxiety ; 25(12): E182-94, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-18979458

RESUMO

BACKGROUND: The aim of this study was to evaluate the Computerized Adaptive Test to measure anxiety (A-CAT), a patient-reported outcome questionnaire that uses computerized adaptive testing to measure anxiety. METHODS: The A-CAT builds on an item bank of 50 items that has been built using conventional item analyses and item response theory analyses. The A-CAT was administered on Personal Digital Assistants to n=357 patients diagnosed and treated at the department of Psychosomatic Medicine and Psychotherapy, Charité Berlin, Germany. For validation purposes, two subgroups of patients (n=110 and 125) answered the A-CAT along with established anxiety and depression questionnaires. RESULTS: The A-CAT was fast to complete (on average in 2 min, 38 s) and a precise item response theory based CAT score (reliability>.9) could be estimated after 4-41 items. On average, the CAT displayed 6 items (SD=4.2). Convergent validity of the A-CAT was supported by correlations to existing tools (Hospital Anxiety and Depression Scale-A, Beck Anxiety Inventory, Berliner Stimmungs-Fragebogen A/D, and State Trait Anxiety Inventory: r=.56-.66); discriminant validity between diagnostic groups was higher for the A-CAT than for other anxiety measures. CONCLUSIONS: The German A-CAT is an efficient, reliable, and valid tool for assessing anxiety in patients suffering from anxiety disorders and other conditions with significant potential for initial assessment and long-term treatment monitoring. Future research directions are to explore content balancing of the item selection algorithm of the CAT, to norm the tool to a healthy sample, and to develop practical cutoff scores.


Assuntos
Transtornos de Ansiedade/diagnóstico , Computadores de Mão , Diagnóstico por Computador , Inventário de Personalidade/estatística & dados numéricos , Software , Adolescente , Adulto , Idoso , Transtornos de Ansiedade/psicologia , Comorbidade , Transtorno Depressivo/diagnóstico , Transtorno Depressivo/psicologia , Feminino , Humanos , Masculino , Transtornos Mentais/diagnóstico , Transtornos Mentais/psicologia , Pessoa de Meia-Idade , Modelos Estatísticos , Psicometria/estatística & dados numéricos , Transtornos Psicofisiológicos/diagnóstico , Transtornos Psicofisiológicos/psicologia , Reprodutibilidade dos Testes , Adulto Jovem
18.
Cancer ; 113(12): 3331-40, 2008 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-18988232

RESUMO

BACKGROUND: Conventional karyotype has an established role in myelodysplastic syndrome (MDS) and is included in the International Prognostic Scoring System (IPSS) for patient risk stratification and treatment selection. Although some chromosomal abnormalities have been well characterized, the significance of several miscellaneous, infrequent, single chromosomal abnormalities remains to be defined. In addition, the emerging therapeutic agents may change the natural course of disease in patients with MDS and the cytogenetic impact on risk stratification. METHODS: Clinicopathologic data were retrieved on 1029 patients who had a diagnosis of primary MDS and had available cytogenetic data (karyotype) on file. RESULTS: Cytogenetic abnormalities were identified in 458 patients (45%) and occurred most frequently in patients who had refractory anemia with excess blasts (62%). Overall, the 3 cytogenetic risk groups defined by the IPSS -- good, intermediate, and poor -- effectively stratified the patients' overall survival (OS) (64 months, 31 months, and 12 months, respectively; P < .001). With the exception of gain of chromosome 8, single cytogenetic abnormalities within the intermediate group were extremely infrequent in the series but demonstrated variable OS ranging from 10 months for patients who had isochromosome (17q) to 69 months for patients who had deletion of 12p [del(12p)], suggesting different prognostic significance. In the poor cytogenetic risk group, patients with isolated del(7q) and derivative (1;7)(q10;p10) had a significantly better median OS than patients who had either loss of chromosome 7 or a complex karyotype (P < .05). CONCLUSIONS: The current data generated from a large cohort of patients with primary MDS indicated that some specific cytogenetic abnormalities carry different risk than their IPSS cytogenetic risk-group assignment, especially in the new treatment era. Because of the extreme low frequency, additional combined studies are needed to better categorize some rare single cytogenetic abnormalities within the intermediate cytogenetic risk group.


Assuntos
Aberrações Cromossômicas , Síndromes Mielodisplásicas/genética , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Síndromes Mielodisplásicas/mortalidade , Risco , Análise de Sobrevida , Estados Unidos
19.
Qual Life Res ; 16 Suppl 1: 143-55, 2007.
Artigo em Inglês | MEDLINE | ID: mdl-17342455

RESUMO

Within the framework of item response theory (IRT), we developed a German version of an item bank, as well as a software application that can be employed to measure anxiety by means of a computer adaptive test (CAT). A sample of n = 2348 psychiatric and psychosomatic patients answered a set of up to 13 standardized questionnaires. 81 items drawn from these questionnaires were considered pertinent to the anxiety construct. Various tests were conducted to ensure the suitability of these items for an IRT-based assessment. After these tests, 50 items remained in the item bank and were calibrated using the Generalized Partial Credit Model. Simulation studies conducted on an independent sample of n = 1528 respondents indicate that 6-8 items suffice to measure the latent trait with high precision (standard error

Assuntos
Ansiedade/psicologia , Nível de Saúde , Avaliação de Resultados em Cuidados de Saúde/métodos , Software , Inquéritos e Questionários , Simulação por Computador , Humanos , Saúde Mental , Modelos Estatísticos , Psicometria
20.
J Psychosom Res ; 61(1): 113-21, 2006 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-16813853

RESUMO

OBJECTIVE: The aims of this study are to adapt two validated self-report questionnaires of deliberate self-harm and suicidal behavior to German, to investigate their psychometric properties and agreement with clinician-administered ratings, and to examine their psychopathological correlates. METHODS: The Deliberate Self-Harm Inventory [Gratz KL. Measurement of deliberate self-harm: preliminary data on the deliberate self-harm inventory. J Psychopathol Behav 2001;23:253-263] and the Self-Harm Behavior Questionnaire [Guttierez PM, Osman A, Barrios FX, Kopper BA. Development and initial validation of the self-harm behavior questionnaire. J Pers Assess 2001;77:475-490] were completed by 361 patients hospitalized for depressive, anxiety, adjustment, somatoform, and/or eating disorders. A clinician-administered rating scale of self-destructive behavior was included. Psychopathological variables were assessed by standardized questionnaires. RESULTS: The self-report questionnaires demonstrated good reliability (alpha=.81-.96, split-half r=.78-.98, test-retest r=.65-.91). Reliability of the clinician-administered ratings was acceptable (interrater kappa=.46-.77, test-retest kappa=.35-.48). Intraclass correlations (ICC=.68) for all three instruments were satisfactory. Rates of self-harm and associations between self-harm and suicidal behaviors are reported. The findings support the hypotheses of a higher degree of psychiatric symptomatology in patients with self-harm behavior compared to those without. CONCLUSION: The two questionnaire adaptations are reliable and valid self-report scales for the assessment of self-harm and past suicidal behavior.


Assuntos
Transtornos Mentais/psicologia , Inventário de Personalidade/estatística & dados numéricos , Comportamento Autodestrutivo/psicologia , Tentativa de Suicídio/psicologia , Adolescente , Adulto , Idoso , Comorbidade , Comparação Transcultural , Feminino , Alemanha , Humanos , Intenção , Idioma , Masculino , Transtornos Mentais/diagnóstico , Pessoa de Meia-Idade , Motivação , Determinação da Personalidade/estatística & dados numéricos , Psicometria/estatística & dados numéricos , Reprodutibilidade dos Testes , Medição de Risco , Transtornos Somatoformes/diagnóstico , Transtornos Somatoformes/psicologia , Estatística como Assunto , Inquéritos e Questionários
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