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BACKGROUND: Caffeine is the first-choice drug for the treatment for apnea of prematurity (AOP) in preterm infants and it has been reported that it improves the diaphragm activity. The aim of this study was to evaluate by ultrasound possible changes in diaphragm contractility and motility induced by caffeine. METHODS: We studied 26 preterm infants with gestational age ≤34 weeks treated with caffeine for the prevention or treatment of AOP. Diaphragmatic ultrasound was performed 15 min (T0 ) before and 60 min (T60 ) after the loading (20 mg/kg) or maintenance (5 mg/kg) dose of caffeine. RESULTS: Diaphragmatic excursion (DE) and thickness at the end of inspiration (DT-in) and expiration (DT-ex), as well as peak velocity of the excursion at the end of inspiration (DT-in) and expiration (DT-ex) increased after administration of both loading and maintenance dose of caffeine. CONCLUSIONS: Ultrasounds confirmed that caffeine improves the activity of diaphragm in preterm infants improving its thickness, amplitude of excursions, and contraction velocity. These results are consistent with the effectiveness of caffeine in treating AOP and decreasing the risk of failure of noninvasive respiratory support in preterm infants with respiratory distress syndrome (RDS).
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Cafeína , Síndromes da Apneia do Sono , Lactente , Recém-Nascido , Humanos , Cafeína/farmacologia , Cafeína/uso terapêutico , Recém-Nascido Prematuro , Diafragma/diagnóstico por imagem , Apneia/tratamento farmacológico , Idade GestacionalRESUMO
BACKGROUND: Citomegalovirus (CMV) infects approximately 1% of live newborns. About 10% of the infants affected by congenital CMV infection are symptomatic at birth and up to 60% of these infants will develop permanent neurological disabilities. Depending on gestational age (GA) at the time of infection, the involvement of central nervous system (CNS) can lead to malformations of cortical development, calcifications, periventricular white matter lesions and cysts, ventriculomegaly and cerebellar hypoplasia. CASE PRESENTATION: We report the MRI findings in a Caucasian female born at 32 weeks of post-menstrual age with post-birth diagnosis of congenital CMV infection showing an unusual and peculiar marked T2 hyperintensity of the inner part of olfactory bulbs in addition to the CMV related diffuse brain involvement. Despite the known extensively described fetal and neonatal Magnetic Resonance Imaging (MRI) findings in CMV infected fetuses and newborns, any in vivo MRI depiction of olfactory system damage have never been reported so far. Nevertheless, in murine studies CMV is known to infect the placenta during pregnancy showing particular tropism for neural stem cells of the olfactory system and previous neuropathologic study on CMV infected human fetal brains from 23 to 28 weeks of GA reported damage in the olfactory bulbs (OB) consisting in disseminated cytomegalic cells, inflammation, necrosis and neuronal and radial glial cell loss. Therefore, we assume an OB involvement and damage in congenital CMV infection. CONCLUSION: To our knowledge this is the first in vivo MRI evidence of OB damage in a newborn with congenital CMV infection that may give new insights on CMV infection.
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Infecções por Citomegalovirus/congênito , Imageamento por Ressonância Magnética , Bulbo Olfatório/diagnóstico por imagem , Bulbo Olfatório/virologia , Feminino , Humanos , Recém-NascidoRESUMO
BACKGROUND: Previous research shows that a lung ultrasound score (LUS) can anticipate CPAP failure in neonatal respiratory distress syndrome. RESEARCH QUESTION: Can LUS also predict the need for surfactant replacement? STUDY DESIGN AND METHODS: Multicenter, pragmatic study of preterm neonates who underwent lung ultrasound at birth and those given surfactant by masked physicians, who also were scanned within 24 h from administration. Clinical data and respiratory support variables were recorded. Accuracy of LUS, oxygen saturation to Fio2 ratio, Fio2, and Silverman score for surfactant administration were evaluated using receiver operating characteristic curves. The simultaneous prognostic values of LUS and oxygen saturation to Fio2 ratio for surfactant administration, adjusting for gestational age (GA), were analyzed through a logistic regression model. RESULTS: Two hundred forty infants were enrolled. One hundred eight received at least one dose of surfactant. LUS predicted the first surfactant administration with an area under the receiver operating characteristic curve (AUC) of 0.86 (95% CI, 0.81-0.91), cut off of 9, sensitivity of 0.79 (95% CI, 0.70-0.86), specificity of 0.83 (95% CI, 0.76-0.89), positive predictive value of 0.79 (95% CI, 0.71-0.87), negative predictive value of 0.82 (95% CI, 0.75-0.89), positive likelihood ratio of 4.65 (95% CI, 3.14-6.89), and negative likelihood ratio of 0.26 (95% CI, 0.18-0.37). No significant difference was shown among different GA groups: 25 to 27 weeks' GA (AUC, 0.91; 95% CI, 0.84-0.99), 28 to 30 weeks' GA (AUC, 0.81; 95% CI, 0.72-0.91), and 31 to 33 weeks' GA (AUC, 0.88; 95% CI, 0.79-0.95), respectively. LUS declined significantly within 24 h in infants receiving one surfactant dose. When comparing Fio2, oxygen saturation to Fio2 ratio, LUS, and Silverman scores as criteria for surfactant administration, only the latter showed a significantly poorer performance. The combination of oxygen saturation to Fio2 ratio and LUS showed the highest predictive power, with an AUC of 0.93 (95% CI, 0.89-0.97), regardless of the GA interval. INTERPRETATION: LUS is a reliable criterion to administer the first surfactant dose regardless of GA. Its association with oxygen saturation to Fio2 ratio significantly improves the prediction power for surfactant need.
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Recém-Nascido Prematuro , Surfactantes Pulmonares/administração & dosagem , Síndrome do Desconforto Respiratório do Recém-Nascido/diagnóstico por imagem , Síndrome do Desconforto Respiratório do Recém-Nascido/tratamento farmacológico , Ultrassonografia/métodos , Feminino , Humanos , Recém-Nascido , Masculino , Saturação de OxigênioRESUMO
BACKGROUND AND OBJECTIVES: The utility of a lung ultrasound score (LUS) has been described in the early phases of neonatal respiratory distress syndrome (RDS). We investigated lung ultrasound as a tool to monitor respiratory status in preterm neonates throughout the course of RDS. METHODS: Preterm neonates, stratified in 3 gestational age cohorts (25-27, 28-30, and 31-33 weeks), underwent lung ultrasound at weekly intervals from birth. Clinical data, respiratory support variables, and major complications (sepsis, patent ductus arteriosus, pneumothorax, and persistent pulmonary hypertension of the neonate) were also recorded. RESULTS: We enrolled 240 infants in total. The 3 gestational age intervals had significantly different LUS patterns. There was a significant correlation between LUS and the ratio of oxygen saturation to inspired oxygen throughout the admission, increasing with gestational age (b = -0.002 [P < .001] at 25-27 weeks; b = -0.006 [P < .001] at 28-30 weeks; b = -0.012 [P < .001] at 31-33 weeks). Infants with complications had a higher LUS already at birth (12 interquartile range 13-8 vs 8 interquartile range 12-4 control group; P = .001). In infants 25 to 30 weeks' gestation, the LUS at 7 days of life predicted bronchopulmonary dysplasia with an area under the curve of 0.82 (95% confidence interval 0.71 to 93). CONCLUSIONS: In preterm neonates affected by RDS, the LUS trajectory is gestational age dependent, significantly correlates with the oxygenation status, and predicts bronchopulmonary dysplasia. In this population, LUS is a useful, bedside, noninvasive tool to monitor the respiratory status.
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Displasia Broncopulmonar/etiologia , Pulmão/diagnóstico por imagem , Sistemas Automatizados de Assistência Junto ao Leito , Síndrome do Desconforto Respiratório do Recém-Nascido/diagnóstico por imagem , Ultrassonografia , Feminino , Idade Gestacional , Humanos , Lactente , Recém-Nascido , Recém-Nascido Prematuro , Unidades de Terapia Intensiva Neonatal , Masculino , Oxigênio/sangue , Valor Preditivo dos Testes , Estudos Prospectivos , Síndrome do Desconforto Respiratório do Recém-Nascido/complicações , Sensibilidade e EspecificidadeRESUMO
Our aim was to assess the efficacy and safety of intravenous (i.v.) paracetamol vs. i.v. ibuprofen for the treatment of hemodynamically significant patent ductus arteriosus (hsPDA) in preterm infants. This is a multicenter randomized controlled study. Infants with a gestational age of 25+0-31+6 weeks were randomized to receive i.v. paracetamol (15 mg/kg/6 h for 3 days) or i.v. ibuprofen (10-5-5 mg/kg/day). The primary outcome was the closure rate of hsPDA after the first treatment course with paracetamol or ibuprofen. Secondary outcomes included the constriction rate of hsPDA, the re-opening rate, and the need for surgical closure. Fifty-two and 49 infants received paracetamol or ibuprofen, respectively. Paracetamol was less effective in closing hsPDA than ibuprofen (52 vs. 78%; P = 0.026), but the constriction rate of the ductus was similar (81 vs. 90%; P = 0.202), as confirmed by logistic regression analysis. The re-opening rate, the need for surgical closure, and the occurrence of adverse effects were also similar.Conclusions: Intravenous paracetamol was less effective in closing hsPDA than ibuprofen, but due to a similar constriction effect, its use was associated with the same hsPDA outcome. These results can support the use of i.v. paracetamol as a first-choice drug for the treatment of hsPDA.Trial registration: Clinicaltrials.gov : NCT02422966, Date of registration: 04/09/2015; EudraCT no: 2013-003883-30. What is Known: ⢠The successful closure of patent ductus arteriosus with oral paracetamol has been recently reported in several preterm infants, but only one randomized controlled study investigated the efficacy of intravenous paracetamol. What is New: ⢠Intravenous paracetamol is less effective in closing hsPDA than ibuprofen, but have a similar constriction effect. ⢠These results can support the use of i.v. paracetamol as a first-choice drug for the treatment of hsPDA.
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Permeabilidade do Canal Arterial , Ibuprofeno , Acetaminofen , Permeabilidade do Canal Arterial/tratamento farmacológico , Idade Gestacional , Humanos , Lactente , Recém-Nascido , Recém-Nascido PrematuroRESUMO
Context: It has been reported that isoprostanes (IPs) have a role in the pathophysiology of ductus arteriosus during the fetal and neonatal period. Our aim in this study was to assess if urinary IPs (uIPs) levels correlate with the risk of developing a hemodynamically significant patent ductus arteriosus (hsPDA) in preterm infants. Materials and methods: Infants with 23 + 0 - 33 + 6 weeks of gestational age and respiratory distress syndrome (RDS) were consecutively enrolled. Urine samples were collected on the 2nd and 10th day of life (DOL) for uIPs measurement. Echocardiography for hsPDA diagnosis was performed between 24 and 48 h of life. Regression analysis was performed to assess the correlation between uIPs and hsPDA. Receiver operating characteristic (ROC) curve analysis was used to evaluate the accuracy of the uIPs in predicting the occurrence of hsPDA. Results: Sixty patients were studied: 33 (55%) developed a hsPDA, 27 (45%) had ibuprofen hsPDA closure, and six (10%) required surgical closure. uIPs levels decreased from the 2nd to the 10th DOL. Adjusted regression analysis demonstrated that uIPs on the 2nd DOL were associated (p = 0.02) with the risk of developing a hsPDA. A cut-off level of 1627 ng/mg of creatinine of uIPs predicted the development of a hsPDA with a sensitivity of 82% and a specificity of 73%. Conclusion: Early measurement of uIPs on the 2nd DOL is a reliable biomarker of hsPDA development and, alone or combined with other markers, might represent a non-invasive tool useful for planning the management of PDA in preterm infants.
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Congenital diaphragmatic hernia (CDH) occurs in approximately 1 in 2500 to 5000 infants. The use of lung ultrasound (LUS) for its diagnosis has been reported in only two case reports. The aim of this study was to report the LUS pattern of CDH in a case series of infants with respiratory distress. This case series was part of a cohort enrolled in a larger prospective observational study. LUS was performed at the point-of-care during the first 24 h of life of the neonates and its operation time was measured. Seven cases (six left and one right CDH) were diagnosed. We found that the pattern of LUS for CDH diagnosis includes (1) partial absence of the hyperechoic line representing the normal diaphragmatic profile, (2) partial absence of the pleural line in the affected hemithorax, (3) absence of A lines in the affected area, (4) presence of multi-layered area with hyperechoic contents in motion (normal gut), and (5) possible presence of parenchymatous organs inside the thorax (i.e., liver or spleen).Conclusion: A description of LUS pattern in infants with CDH is provided. LUS at the point-of-care may allow the prompt diagnosis of CDH and this is particularly useful in cases of missed prenatal diagnosis. What is Known: ⢠Congenital diaphragmatic hernia occurs in approximately 1 in 2500 to 5000 infants but the use of lung ultrasound for its diagnosis has been reported in only two case reports. What is New: ⢠Research provided a description of lung ultrasound pattern in infants with congenital diaphragmatic hernia. ⢠Lung ultrasound at the point-of-care may allow a prompt diagnosis of congenital diaphragmatic hernia, particularly useful in cases of missed prenatal diagnosis.
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Hérnias Diafragmáticas Congênitas/diagnóstico , Pulmão/diagnóstico por imagem , Ultrassonografia/métodos , Diagnóstico Precoce , Idade Gestacional , Hérnias Diafragmáticas Congênitas/patologia , Humanos , Recém-Nascido , Pulmão/patologia , Testes Imediatos , Estudos Prospectivos , Método Simples-CegoRESUMO
BACKGROUND: Respiratory distress (RD) is the most common neonatal illness. Lung ultrasound (LUS) is a technique previously tested in neonatal studies on RD, but literature regarding its routine clinical applicability is still lacking. OBJECTIVE: To assess the concordance between LUS performed by neonatologists with different training levels and chest X-ray (CXR) for the diagnosis of RD in newborns during the first 24 h of life. METHODS: We enrolled newborns with RD during the first 24 h of life. Patients underwent LUS and CXR. LUS and CXR diagnosis were compared to evaluate concordance. Twenty percent of patients received two LUS (one from an experienced and one from a novice sonographer) to calculate the interobserver agreement. The difference in time needed to reach a diagnosis with LUS and CXR, and from novice and expert operators, was measured. RESULTS: We studied 124 patients; 134 diagnoses were reported. The concordance between LUS and CXR diagnosis was 91% (95% CI 86-96%) with a κ statistic of 0.88 (95% CI 0.81-0.94). The median time to diagnosis was shorter for LUS (9.5 min, IQR 5-15) than for CXR (50 min, IQR 33-64) (p < 0.0001). In 25/124 patients, LUS was performed by both novice and experienced sonographers with complete concordance. The median time to diagnosis was shorter for expert (9 min, IQR 5-15) than novice operators (15 min, IQR 10-20) (p < 0.0002). CONCLUSION: LUS and CXR have a high concordance in the differential diagnosis of neonatal RD in the first 24 h of life. LUS has a shorter operation time than CXR.
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Terapia Intensiva Neonatal/normas , Pulmão/diagnóstico por imagem , Síndrome do Desconforto Respiratório do Recém-Nascido/diagnóstico , Diagnóstico Diferencial , Feminino , Humanos , Recém-Nascido , Itália , Masculino , Sistemas Automatizados de Assistência Junto ao Leito , Estudos Prospectivos , Radiografia Torácica , Fatores de Tempo , UltrassonografiaRESUMO
AIM: This Italian study evaluated whether painful procedures during the first four weeks of life were related to subsequent weight gain, head circumference (HC) and neurodevelopmental outcomes in preterm infants, METHODS: We evaluated the number of invasive procedures that infants born at less than 32 weeks of gestational age (GA) underwent in the Neonatal Intensive Care Unit of Careggi Hospital, Florence, from January to December 2015. Weight and HC were recorded at birth, 36 weeks of PMA and six and 12 months of CA. Neurological outcomes were assessed at six and 12 months of CA using the Bayley Scales of Infant and Toddler Development - Third Edition. RESULTS: We studied 83 preterm infants with a GA of 28 ± 2 weeks and birth weight of 1098 ± 340 g. A higher number of invasive painful procedures were related to a lower HC standard deviation score at 36 weeks of PMA and six and 12 months of CA and with lower cognitive scores at six months. At 12 months, the relationship only remained significant for infants born at less than 28 weeks (p < 0.001). CONCLUSION: Invasive painful procedures affected regular HC growth and short-term cognitive scores in preterm infants in the first year of life.
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Desenvolvimento Infantil , Recém-Nascido Prematuro/crescimento & desenvolvimento , Dor Processual/fisiopatologia , Aumento de Peso , Feminino , Humanos , Recém-Nascido , Masculino , Estudos RetrospectivosRESUMO
PURPOSE: Among negative emotions, anger has not been studied in as much depth in her connection to postpartum mood disorders. The study aimed to investigate the role of anger as a potential vulnerability factor increasing the risk of Maternity Blues (MB) and Postpartum Depression (PPD). MATERIALS AND METHODS: Pregnant women in their third trimester of pregnancy underwent the following tests: the State Trait Anger Expression Inventory 2 - STAXI-2 (baseline visit), the Blues Questionnaire -BQ (3 and 5 days after delivery), and the Edinburgh Postnatal Depression Scale (EPDS) (3 and 6 months following delivery). RESULTS: One hundred ten subjects were included in this study. The prevalence rate of mothers with MB was about 35%, whereas about 4% of women developed a PPD. Significant positive correlations were found among State anger (SANG), Trait anger (TANG), anger expression out (AXO) and in (AXI) and postpartum depressive disorders, as measured by blues questionnaire (BQ) and EPDS. CONCLUSIONS: Anger experience and expression can be considered as vulnerability factors for postpartum mood disorders onset. Particularly, the expression of angry feelings toward other persons or objects in the environment (AXO) predicts the onset of MB, whereas holding in or suppressing angry feelings (AXI) could be a risk factor for subsequent PPD.
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Ira , Depressão Pós-Parto/etiologia , Adulto , Feminino , Humanos , Gravidez , Estudos Prospectivos , PsicometriaRESUMO
Objectives The aim of the study was to compare the effects on cerebral oxygenation in preterm infants of two different procedures for surfactant administration: the LISA (low-invasive method of surfactant administration) and the InSurE (Intubation, SURfactant administration, Extubation). Study Design Twenty premature infants with respiratory distress syndrome were assigned to receive surfactant either by "LISA" (n = 10) or "InSurE" (n = 10) procedure. Patients were continuously studied by near-infrared spectroscopy (NIRS) for the measurement of cerebral regional oxygenation (rSO2C) and calculation of cerebral fractional oxygen extraction rate (cFTOE), and NIRS data were recorded 30 minutes before (T0) surfactant administration, during the procedure (Tproc), and 30 (T1), 60 (T2T2), and 120 minutes (T3) afterward. Cerebral blood flow velocity (CBFV) was studied in the anterior cerebral artery at T0, T1, and T3. Results SpO2 significantly decreased at Tproc in comparison with T0, T1, T2, and T3 and the decrease was higher in the LISA than in the InSurE group. rSO2C was lower at tproc and T3 in the LISA than in the InSurE group. cFTOE was higher at tproc, t2, and t3 in the LISA group than in the InSurE group. CBFV did not change during the study periods in both groups. Conclusions The LISA and InSurE procedures transiently decreased rSO2C in our population, and the decrease was higher in the LISA group. Consistently, there was a contemporary increase in cFTOE that was higher in the LISA than in the InSurE group, suggesting that it represents a compensatory mechanism.
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Encéfalo/efeitos dos fármacos , Encéfalo/metabolismo , Recém-Nascido Prematuro , Surfactantes Pulmonares/administração & dosagem , Síndrome do Desconforto Respiratório do Recém-Nascido/tratamento farmacológico , Síndrome do Desconforto Respiratório do Recém-Nascido/metabolismo , Velocidade do Fluxo Sanguíneo/efeitos dos fármacos , Velocidade do Fluxo Sanguíneo/fisiologia , Encéfalo/diagnóstico por imagem , Circulação Cerebrovascular/efeitos dos fármacos , Circulação Cerebrovascular/fisiologia , Feminino , Humanos , Recém-Nascido , Terapia Intensiva Neonatal/métodos , Intubação Gastrointestinal , Intubação Intratraqueal , Masculino , Oximetria , Oxigênio/sangue , Estudos Prospectivos , Síndrome do Desconforto Respiratório do Recém-Nascido/diagnóstico por imagem , Espectroscopia de Luz Próxima ao Infravermelho , Resultado do Tratamento , Ultrassonografia Doppler TranscranianaRESUMO
BACKGROUND: The risk of developing red blood cell (RBC) transfusion-associated necrotizing enterocolitis (TANEC) in preterm infants has recently been emphasized. Our aim was to assess changes in cytokine serum levels after RBC transfusions in a cohort of very preterm infants to evaluate their possible proinflammatory effect. STUDY DESIGN AND METHODS: We carried out a prospective observational study. One transfusion event was studied in infants less than 32 weeks' gestation and more than 7 days old (n = 20) admitted to a tertiary neonatal intensive care unit. Interleukin (IL)-1ß, IL-6, IL-8, tumor necrosis factor-α, interferon-γ (IFN-γ), IL-17, monocyte chemoattractant protein-1 (MCP-1), interferon-γ-induced protein 10 (IP-10), intracellular adhesion molecule-1 (ICAM-1), and vascular cell adhesion molecule serum levels were measured in enrolled patients within 120 minutes before (T0 ) the RBC transfusion and then within 120 minutes (T1 ), 12 ± 3 hours (T2 ), 24 ± 6 hours (T3 ), and 48 ± 6 hours (T4 ) after the end of RBC transfusion. RESULTS: Infants received 19.8 ± 3.0 mL of RBCs at the mean age of 50 ± 18 days. Their hematocrit level increased from 24.1 ± 1.2% to 39.4 ± 2.9%. IL-1ß, IL-8, IFN-γ, IL-17, MCP-1, IP-10, and ICAM-1 increased significantly after RBC transfusions. CONCLUSION: Proinflammatory cytokines are increased after RBC transfusion. These findings may contribute to explaining the pathogenesis of TANEC and suggest the opportunity of adopting wise transfusion guidelines that would help to avoid detrimental risks of transfusion-related immunomodulation and of undertransfusion.
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Citocinas/sangue , Transfusão de Eritrócitos/efeitos adversos , Citocinas/genética , Enterocolite Necrosante/etiologia , Feminino , Idade Gestacional , Humanos , Imunomodulação , Lactente , Recém-Nascido , Recém-Nascido Prematuro , Mediadores da Inflamação , Unidades de Terapia Intensiva Neonatal , Masculino , Estudos Prospectivos , Ativação TranscricionalRESUMO
The aim of our study was to investigate the relationship between nutritional status (body mass index and phase angle) and psychological symptoms at admission and discharge in a residential population of anorexic patients. We also aimed to determine the evolution of the above psychological symptoms and nutrition rehabilitation from admission to discharge. Thirty-six consecutive patients were included. The evaluation was performed using the following measures at admission and discharge: body mass index, phase angle, Eating Disorders Inventory-3, Multiphasic Personality Inventory-2 and Body Uneasiness. Admission and discharge nutritional status were not correlated with psychometric scores respectively at admission and at discharge. In addition, neither the improvement in the scores on the psychometric scales between admission and discharge was correlated to body mass index, phase angle improvement. For the group as a whole there were significant improvements from admission to discharge in nutritional status, Multiphasic Personality Inventory-2-Depression, Body Uneasiness-Global Score Index and in all the composites of Eating Disorders Inventory-3. Our data showed a disconnection between nutritional status and eating disorders psychopathology and/or psychiatric comorbidities.
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Anorexia Nervosa/psicologia , Índice de Massa Corporal , Estado Nutricional , Admissão do Paciente/estatística & dados numéricos , Alta do Paciente/estatística & dados numéricos , Adulto , Anorexia Nervosa/fisiopatologia , Depressão/psicologia , Feminino , Humanos , Masculino , Inventário de Personalidade , Psicometria , PsicopatologiaRESUMO
BACKGROUND: The State-Trait Anger Expression Inventory 2 (STAXI-2) is a psychometric instrument measuring anger experience and expression. Associations between the STAXI-2 and risk of breast cancer (BC) are rarely considered together in a prospective study. PATIENTS AND METHODS: A total of 117 women with breast symptoms referred for breast examination were selected and assessed before any diagnostic procedures. RESULTS: Twenty-four patients with BC, 44 with benign breast disease (BBD) and 49 healthy individuals (HHS) were included. Scores for parameters state anger/feel like expressing anger physically (SANGP) were significantly higher in the HHS group (HHS vs. BBD: p=0.027; HHS vs. BC: p=0.025). BC patients showed a trend to lower scores in almost all scales of STAXI-2, except for the scales trait anger/angry temperament (TANGT), anger expression-in (AX-I), and anger control-out (AC-O), that were higher than the two other groups' scores. CONCLUSION: The results of this study do not support a specific link between STAXI-2 and breast cancer risk.