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1.
J Hum Nutr Diet ; 21(2): 129-40, 2008 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-18339053

RESUMO

BACKGROUND: Although current dietary guidelines recommend limiting foods high in fat and saturated fat, such as high-fat dairy, the effect of cheese consumption on body composition and cardiovascular risk factors is largely unknown. METHODS: Participants from a US population-based survey, NHANES III, aged 25-75 years who completed a food frequency questionnaire and had measures of body composition and cardiovascular risk factors were included (n = 10 872). Linear regression was used to compare anthropometrics, blood lipids, blood pressure and blood glucose across categories of cheese consumption (combined full and low-fat). RESULTS: In women, more frequent cheese consumption was associated with higher HDL-C and lower LDL-C (p for trend, < 0.05). However, in men, more frequent cheese consumption was associated with a higher body mass index (BMI), waist circumference, HDL-C and LDL-C, and diastolic blood pressure (p for trend, < 0.05). Men consuming 30 + servings/month had significantly higher BMI, waist circumference, and diastolic blood pressure compared to nonconsumers (P < 0.05). CONCLUSIONS: More frequent cheese consumption was associated with less favourable body composition and cardiovascular risk profile in men, but with a more favourable cardiovascular risk profile in women. However, the type of cheese consumed by men and women may have differed resulting in opposing trends on body composition and cardiovascular risk factors.


Assuntos
Pressão Sanguínea/fisiologia , Composição Corporal/fisiologia , Doenças Cardiovasculares/epidemiologia , Queijo , Lipídeos/sangue , Adulto , Idoso , Glicemia/metabolismo , Índice de Massa Corporal , Doenças Cardiovasculares/etiologia , Feminino , Humanos , Modelos Lineares , Masculino , Pessoa de Meia-Idade , Inquéritos Nutricionais , Fatores de Risco , Fatores Sexuais , Inquéritos e Questionários , Estados Unidos
2.
Diabetes Care ; 22(9): 1524-9, 1999 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-10480520

RESUMO

OBJECTIVE: We previously demonstrated a direct correlation between serum insulin levels and gonadal androgens (testosterone and androstenedione) in a group of obese hyperandrogenic predominantly black women. Subsequent work by others in predominantly white women showed conflicting results. To examine these potentially important racial differences further, 14 premenopausal females from each ethnic group, of similar age, BMI, and waist-to-hip ratio, were studied. RESEARCH DESIGN AND METHODS: We measured baseline gonadal androgens, dehydroepiandrosterone (DHEA), dehydroepiandrosterone sulfate (DHEAS), and leutinizing hormone (LH)/follicle-stimulating hormone ratio. Serum glucose, insulin, and C-peptide were measured at baseline and during a 2-h oral glucose tolerance test (area under the curve [AUC]). Insulin sensitivity was measured by glucose decrement during the first 15 min of an intravenous insulin tolerance test. RESULTS: Simple correlation analysis revealed a significant direct correlation in blacks (but not whites) between gonadal androgens and AUC for glucose, insulin, and C-peptide. Race-by-covariate interaction models reinforced the simple correlation finding. Cholesterol level was also correlated to all androgens in blacks, but not in whites. We also found that whites had higher serum triglycerides and greater AUC glucose than blacks. CONCLUSIONS: We conclude that there is a significant direct correlation between gonadal androgens and stimulated glucose, insulin, and C-peptide in blacks but not in whites. Thus, the previously reported direct correlation between gonadal hyperandrogenism and hyperinsulinemia may be a race-dependent phenomenon, hitherto an unreported observation. The implications of these findings are discussed.


Assuntos
Androstenodiona/sangue , População Negra/genética , Insulina/sangue , Pré-Menopausa , Testosterona/sangue , População Branca/genética , Adolescente , Adulto , Índice de Massa Corporal , Desidroepiandrosterona/sangue , Sulfato de Desidroepiandrosterona/sangue , Demografia , Feminino , Hormônio Foliculoestimulante/sangue , Humanos , Hormônio Luteinizante/sangue
3.
J Bone Miner Res ; 10(12): 1998-2004, 1995 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-8619381

RESUMO

Dual X-ray absorptiometry (DXA) measurements have been shown to provide useful information on bone mineral status in young pediatric subjects. The purpose of this study was to challenge this system under various conditions to determine the clinical and experimental parameters that may be encountered which could interfere with DXA-based bone mineral content (BMC) and bone mineral density (BMD) measurements. Variations in data acquisition, including the covering of step phantom (external calibration standard) with a cotton blanket or partial exclusion of step phantom in the scan field, tissue freezing, or the presence of small nonmetallic objects, did not significantly alter DXA BMC or BMD measurements. By contrast, the presence of movement artifact, radiographic contrast media, and nonmetallic orthopedic casts significantly interfered with DXA BMC and BMC measurements. Variability in operator-dependent analysis of DXA scans occurred with regional analysis of whole body scans for DXA BMC and BMD measurements (average coefficient of variation was 2.9% and 1%, respectively, depending on the region analyzed) but did not affect the total (whole body) result. A minor adjustment in the manual delineation of the step phantom during data analysis may result in almost a 30% difference in DXA BMC and BMD. We conclude that movement artifact, radiographic contrast media, nonmetallic or orthopedic cast, and variations in operator-dependent data analysis may interfere with DXA BMC and BMD measurement in young pediatric subjects. Therefore, appropriate care should be taken to reduce or eliminate such interference.


Assuntos
Absorciometria de Fóton/métodos , Densidade Óssea/fisiologia , Análise de Variância , Animais , Animais Recém-Nascidos , Calibragem , Humanos , Lactente , Recém-Nascido , Modelos Lineares , Movimento , Imagens de Fantasmas , Padrões de Referência , Reprodutibilidade dos Testes , Suínos
4.
J Bone Miner Res ; 11(7): 997-102, 1996 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-8797121

RESUMO

We studied bone mineral status using dual-energy X-ray absorptiometry (DXA) on 150 singleton newborn infants with birth weights 1002-3990 g and gestational ages (GA) 27-42 weeks. Eighty-five infants were preterm (< 38 weeks), and 79 infants were low birth weight (< or = 2500 g). In addition, we aimed to determined the predictive value of anthropometric measurements, race, and gender on variability in bone mineral status. Data were acquired using a whole body DXA scanner with a pediatric platform. Scan analyses were performed with software version V5.64P. Results showed a highly significant (p < 0.001 for all comparisons) correlation among the continuous independent variables, gestational age, birth weight, study weight, study bare weight, and study length, and between independent and each of the dependent variables, total body bone mineral content (TB BMC), TB area, and TB bone mineral density (TB BMD). The best single determinant of bone mineral status is body weight, accounting for 95% of TB BMC and TB area and for 86% of TB BMD variation. Body length was the only additional significant predictor of TB area. Inclusion of postnatal age (during the first week after birth), race, gender, or season, either individually or in combination, failed to improve bone mineral status explanation. By term (GA 38-42 weeks, birth weight 2700-3990 g), the mean TB BMC was 68.2 g, TB area 307.6 cm2, and TB BMD 0.221 g/cm2. We conclude that DXA can be performed even in small preterm infants during the newborn period. Our results can be used as a basis for further studies in physiologic and pathologic situations that might affect bone mineralization in infants.


Assuntos
Absorciometria de Fóton , Peso ao Nascer/fisiologia , Densidade Óssea/fisiologia , Recém-Nascido/fisiologia , Grupos Raciais , Caracteres Sexuais , Antropometria , Feminino , Idade Gestacional , Humanos , Modelos Lineares , Masculino , Estações do Ano
5.
J Clin Endocrinol Metab ; 83(2): 685-7, 1998 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-9467593

RESUMO

Ninety-three hyperthyroid patients were treated with 1 dose of iodine-131 (131I) during the past 10 years. Thirty-three were pretreated with propylthiouracil (PTU), 22 with methimazole (MMI), and 38 received no antithyroid drugs (ATD). ATD were discontinued 5-55 days before 131I therapy in three fourths of the cases and more than 4 months before therapy in one fourth of the cases. The frequency of cures in the 3 groups, 6-8 months after radioiodine therapy, was retrospectively studied. The cure rate among those who discontinued PTU for 5-55 days before 131I was significantly reduced (24%), compared with those who discontinued MMI for the same duration (61%) or those who received no ATD (66%). When PTU was discontinued for more than 4 months, the cure rate was similar to those who received no ATD. It is concluded that if ATD are used as initial therapy for hyperthyroidism, then PTU (but not MMI) may reduce the therapeutic efficacy of subsequent 131I. The reduction in cure rate was observed even when PTU was discontinued for as long as 55 days before 131I therapy. To our knowledge, this is the first report to compare, in one study, the effects of pretreatment with PTU and MMI on 131I therapy.


Assuntos
Antitireóideos , Hipertireoidismo/tratamento farmacológico , Hipertireoidismo/radioterapia , Radioisótopos do Iodo/uso terapêutico , Metimazol/efeitos adversos , Pré-Medicação , Propiltiouracila/efeitos adversos , Adulto , Feminino , Humanos , Masculino , Metimazol/uso terapêutico , Pessoa de Meia-Idade , Propiltiouracila/uso terapêutico , Estudos Retrospectivos , Resultado do Tratamento
6.
Pediatr Infect Dis J ; 19(2): 113-7, 2000 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-10693996

RESUMO

OBJECTIVE: To evaluate the relationship between nasal quantity of respiratory syncytial virus (RSV) and disease severity in hospitalized infants without underlying cardiopulmonary disease or immunodeficiency. METHODS: Nasal aspirates were obtained from hospitalized infants <24 months of age with recently identified RSV infection and evaluated for RSV quantity by a standard plaque assay on HEp-2 cell monolayers. Subjects were classified as having "severe" disease if they required mechanical ventilation at the time of sample collection and as having "nonsevere" disease if they did not. Linear modeling was used to determine the relationship between nasal RSV quantity and various independent variables, including disease severity. RESULTS: Nasal aspirates from 39 patients were evaluated. Age, gender and mean duration of time from symptom onset to sample acquisition (5 days) were similar between the severe (n = 15) and nonsevere (n = 24) groups. Significantly more infants were born at <35 weeks gestation in the severe disease group (7 of 15 vs. 3 of 24, P = 0.017), and infants born at <35 weeks gestation were significantly more likely to be of non-Caucasian ethnicity than were infants born at > or =35 weeks gestation (8 of 10 vs. 12 of 29, P = 0.035). The linear model found that higher nasal RSV quantities were associated with severe disease [mean +/- SEM, 5.06 +/- 0.34 log plaque-forming units (pfu)/ml vs. 3.91 +/- 0.35 log pfu/ml, P = 0.022], gestational age > or =35 weeks (5.44 +/- 0.27 log pfu/ml vs. 3.52 +/- 0.45 log pfu/ml, P = 0.002) and non-Caucasian ethnicity (5.16 +/- 0.30 log pfu/ml vs. 3.80 +/- 0.37 log pfu/ml, P = 0.006). CONCLUSIONS: Nasal RSV quantity correlates with disease severity in hospitalized infants with recently identified RSV infection.


Assuntos
Líquido da Lavagem Nasal/virologia , Infecções por Vírus Respiratório Sincicial/fisiopatologia , Vírus Sinciciais Respiratórios/isolamento & purificação , Feminino , Hospitalização , Humanos , Lactente , Modelos Lineares , Masculino , Respiração Artificial , Infecções por Vírus Respiratório Sincicial/virologia , Índice de Gravidade de Doença , Ensaio de Placa Viral
7.
Obstet Gynecol ; 94(4): 577-82, 1999 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-10511362

RESUMO

OBJECTIVE: To determine the effect of maternal calcium supplementation during pregnancy on fetal bone mineralization. METHODS: Healthy mothers with early ultrasound confirmation of dates and singleton pregnancies were enrolled in a double-masked study and randomized before 22 weeks' gestation to 2 g/day of elemental calcium or placebo until delivery. Maternal dietary intake at randomization and at 32-33 weeks' gestation was recorded with 24-hour dietary recalls. Dual-energy x-ray absorptiometry measurements of the whole body and lumbar spine of the neonates were performed before hospital discharge. RESULTS: The infants of 256 women (128 per group) had dual-energy x-ray absorptiometry measurements during the first week of life. There were no significant differences between treatment groups in gestational age, birth weight, or length of the infants, or in the total-body or lumbar spine bone mineral content. However, when bone mineral content was analyzed by treatment group within quintiles of maternal dietary calcium intake, total body bone mineral content (mean +/- standard error of the mean) was significantly greater in infants born to calcium-supplemented mothers (64.1+/-3.2 versus 55.7+/-2.7 g in the placebo group) in the lowest quintile of dietary calcium intake (less than 600 mg/day). The effect of calcium supplementation remained significant after adjustment for maternal age and maternal body mass index and after normalization for skeletal area and body length of the infant. CONCLUSION: Maternal calcium supplementation of up to 2 g/day during the second and third trimesters can increase fetal bone mineralization in women with low dietary calcium intake. However, calcium supplementation in pregnant women with adequate dietary calcium intake is unlikely to result in major improvement in fetal bone mineralization.


Assuntos
Calcificação Fisiológica , Cálcio da Dieta/administração & dosagem , Suplementos Nutricionais , Feto/metabolismo , Absorciometria de Fóton , Adulto , Método Duplo-Cego , Feminino , Humanos , Recém-Nascido , Gravidez
8.
Epilepsy Res ; 32(3): 335-44, 1998 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-9839773

RESUMO

Synaptophysin (SY) is a protein expressed at presynaptic vesicles. SY immunohistochemistry (IHC) was undertaken in surgically resected hippocampal specimens from 25 patients with intractable epilepsy. All were investigated with chronic ictal EEG videotelemetry, which showed a temporal onset in each case, and all had normal magnetic resonance imaging (MRI). The density of reaction product of SY IHC was used to generate optical density (OD) measurements as an estimate of synaptic density in CA1 and CA4 fields (ODCA1 and ODCA4), and inner third and outer two-thirds of the molecular layer of the dentate gyrus (ODIML and ODOML). There was significant correlation between ODCA1 (r=0.619, P=0.001) and ODCA4 (r=0.639, P=0.001) and onset age of epilepsy. There was no correlation between ODCA1 and duration of epilepsy. There was correlation between ODCA4 and duration (r=-0.412, P=0.041), but partial correlations showed no significant correlation between ODCA4 and duration when controlling for onset, although correlation between ODCA4 and onset when controlling for duration remained significant (r=0.536, P < 0.01). Univariate ANOVA revealed onset age to be the only predictor of ODCA1 and ODCA4. Chronological age and duration were not predictors. There was no correlation between ODIML or ODOML and either onset age or duration. ODIML and ODOML were not predicted by onset age, duration or chronological age. These findings support the hypothesis that the major cause of hippocampal sclerosis is an age specific insult rather than the result of repeated seizures.


Assuntos
Epilepsia do Lobo Temporal/metabolismo , Hipocampo/química , Sinaptofisina/análise , Adulto , Idade de Início , Densitometria , Epilepsia do Lobo Temporal/patologia , Hipocampo/patologia , Humanos , Imuno-Histoquímica , Estudos Retrospectivos , Esclerose/etiologia
9.
Epilepsy Res ; 24(2): 119-26, 1996 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-8796360

RESUMO

Controversy exists as to whether hippocampal sclerosis (HS) is a preexisting cause or a consequence of seizures. We investigated 122 consecutive patients who underwent anterior temporal lobectomy for intractable epilepsy between 1989 and 1992. MRI scans were normal apart from evidence of HS in 5 cases. The degree of HS was graded from 0 to 4. There was a significant inverse correlation between age of seizure onset and grade of HS (P < 0.0001), and a positive correlation between duration of epilepsy and grade of HS (P < 0.001). Using a dichotomous grouping of HS (HPSC - for grades 0 and 1 [no/mild HS], and HPSC + for grades 3 and 4 [moderate/marked HS]), there was a positive correlation between HPSC + and a history of childhood febrile seizures (CFS) (P = 0.003), earlier age of onset of epilepsy (P < 0.001) and longer duration of epilepsy (P < 0.001). There was no correlation with history of particularly prolonged individual seizures. Partial correlations after controlling for age at onset of epilepsy showed that there was no longer a significant relationship between HPSC + and duration of epilepsy. After controlling for duration of epilepsy, the relationship between HPSC + and age of onset remained significant (P < 0.001). The correlation between HPSC + and CFS, controlling for age at onset, was not significant. A series of logistic regression analyses showed age at onset to be the only predictor of HPSC +. It is concluded that this is supportive evidence for preexisting HS being a cause of temporal lobe epilepsy and not a consequence of seizures.


Assuntos
Epilepsia/fisiopatologia , Hipocampo/patologia , Convulsões Febris/fisiopatologia , Lobo Temporal/fisiologia , Adulto , Idade de Início , Criança , Eletroencefalografia , Feminino , Hipocampo/fisiopatologia , Humanos , Imageamento por Ressonância Magnética , Masculino , Análise de Regressão , Esclerose , Lobo Temporal/cirurgia , Resultado do Tratamento
10.
Behav Res Ther ; 41(4): 427-45, 2003 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-12643966

RESUMO

Formal diagnostic systems (DSM-IV, ICSD, and ICD-10) do not provide adequate quantitative criteria to diagnose insomnia. This may not present a serious problem in clinical settings where extensive interviews determine the need for clinical management. However, lack of standard criteria introduce disruptive variability into the insomnia research domain. The present study reviewed two decades of psychology clinical trials for insomnia to determine common practice with regard to frequency, severity, and duration criteria for insomnia. Modal patterns established frequency (> or =3 nights a week) and duration (> or =6 months) standard criteria. We then applied four versions of severity criteria to a random sample and used sensitivity-specificity analyses to identify the most valid criterion. We found that severity of sleep onset latency or wake time after sleep onset of: (a) > or =31 min; (b) occurring > or =3 nights a week; (c) for > or =6 months are the most defensible quantitative criteria for insomnia.


Assuntos
Distúrbios do Início e da Manutenção do Sono/diagnóstico , Ensaios Clínicos como Assunto , Humanos , Valor Preditivo dos Testes , Projetos de Pesquisa , Índice de Gravidade de Doença , Fases do Sono , Fatores de Tempo
11.
J Occup Environ Med ; 42(11): 1054-9, 2000 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-11094783

RESUMO

Although participation in vigorous exercise is associated with increased bone mass, recent evidence suggests that loss of calcium in sweat may result in a negative calcium balance and, ultimately, a decrease in bone mass. Anthropometric characteristics, habitual physical activity levels, dietary calcium intake, bone mineral content, and bone turnover markers were measured in 42 male recruits before and after 4 months of firefighter training. During two strenuous mid-training sessions, sweat calcium concentrations were measured; they averaged 1.1 mM. Whole body and total hip bone mineral content increased significantly, as did one marker of bone formation, and were not associated with sweat calcium concentration. This study demonstrates that intense physical training sessions that produce high sweat rates do not have an adverse effect on the bone mineral content of healthy young men.


Assuntos
Densidade Óssea , Cálcio/metabolismo , Educação Física e Treinamento , Sudorese , Absorciometria de Fóton , Adulto , Humanos , Modelos Lineares , Masculino , Ocupações , Radioimunoensaio , Inquéritos e Questionários
12.
Pediatr Crit Care Med ; 2(4): 318-23, 2001 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-12793934

RESUMO

OBJECTIVES: To describe the clinical characteristics of infants admitted to a pediatric intensive care unit (PICU) with respiratory syncytial virus (RSV) infection, including the prevalence of indications for RSV passive antibody prophylaxis (as currently recommended by the American Academy of Pediatrics), and to identify risk factors that predict adverse outcomes among this population. DESIGN: Retrospective medical record review. SETTING: Tertiary care PICU. PATIENTS: Children <2 yrs of age admitted to PICU for the management of RSV disease during the 1994-95, 1995-96, and 1996-97 RSV seasons. MEASUREMENTS AND MAIN RESULTS: The medical records of 89 infants were reviewed. Of these, 55% were born before 36-wks gestation, 14% had chronic lung disease that required medical therapy within the previous 6 months, and 30% met at least one indication for RSV passive antibody prophylaxis. Seven infants had congenital heart disease, five had upper airway abnormalities, and six had various noncardiac congenital malformations. Logistic regression was used to determine which characteristics were associated with prolonged durations (>75th percentile) of mechanical ventilation, PICU stay, and hospital stay. Prolonged mechanical ventilation was associated with congenital heart disease (p = 0.014), chronic lung disease (p = 0.007), and noncardiac congenital malformations (p = 0.022). Only congenital heart disease was associated with prolonged PICU stay (p = 0.004) or prolonged hospital stay (p = 0.006). All of the infants with airway abnormalities had prolonged ventilator days, PICU days, and hospital days. Currently recommended indications for RSV passive antibody prophylaxis were not predictive of prolonged ventilation, PICU stay, or hospital stay. CONCLUSIONS: A minority of infants admitted to our PICU for severe RSV disease meet currently recommended indications for RSV passive antibody prophylaxis. Risk factors that predict prolonged durations of ventilation, PICU stay, or hospital stay among this population include congenital heart disease, chronic lung disease, upper airway abnormalities, and noncardiac congenital malformations.

13.
Phys Ther ; 81(5): 1127-34, 2001 May.
Artigo em Inglês | MEDLINE | ID: mdl-11319938

RESUMO

BACKGROUND AND PURPOSE: The physical therapy profession, through its published educational accreditation standards and its normative model of professional education, has addressed the importance of educating physical therapist students in the basic principles and application of research. The purpose of this study was to conduct a longitudinal study of students relative to (1) their perception of knowledge with respect to research, (2) their perception of what source should be used (evidence-based practice or traditional protocols) for clinical decision making, and (3) their perception of what should be used in a clinical setting for patient management. SUBJECTS: Thirty-six students during the final year of their professional program from a sample of 115 physical therapist students who requested 2 consecutive physical therapist classes completed the entire sequence of pretest and posttest survey administrations. Seventy-nine students did not complete the entire sequence. METHODS: A 10-item 5-point Likert-type questionnaire was designed by the authors to probe the students' attitudes and perceptions about research, their level of comfort and confidence in reading and applying research findings published in the literature, and their personal habits regarding reading the professional literature. An expert panel consisting of internal and external reviewers was used for construction of the questionnaire. The questionnaire was completed by the students immediately preceding their research methods course, immediately after the completion of that course, and following the second research course, which included statistics and development of a research proposal. The subjects also completed the questionnaire after 1 year of physical therapy practice. Friedman's analysis of variance was used as an omnibus test to detect differences across time. In addition, a follow-up analysis using the Wilcoxon signed-rank procedure to examine differences between baseline data and data obtained during each follow-up was done for all items to determine whether a difference occurred at a time other than at the final posttest survey administration. RESULTS: The students showed differences on 5 of the 10 items on the questionnaire during the study. DISCUSSION AND CONCLUSION: These items related to reading peer-reviewed professional journals, critically reading professional literature, relevance and importance of evidence-based clinical practice, and level of comfort with knowledge in research.


Assuntos
Atitude , Modalidades de Fisioterapia/educação , Pesquisa , Estudantes , Adulto , Análise de Variância , Tomada de Decisões , Medicina Baseada em Evidências , Feminino , Humanos , Masculino , Estatísticas não Paramétricas , Tennessee
14.
Angiology ; 48(4): 309-19, 1997 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-9112879

RESUMO

Although positron emission tomography (PET) assesses myocardial viability (V) accurately, a rapid, inexpensive substitute is needed. Therefore, the authors developed a low-dose (1 mCi) Iodine-123-Iodophenylpentadecanoic Acid (IPPA) myocardial viability scan requiring analysis of only the first three minutes of data acquired at rest with a standard multicrystal gamma camera. Twenty-one patients > 2 weeks after myocardial infarction (MI) (24 MIs, 10 anterior, 14 inferoposterior, 21 akinetic or dyskinetic) had cardiac catheterization and resting IPPA imaging. V was determined by either transmural myocardial biopsy during coronary bypass surgery (12 patients, 14 MIs) or reinjection tomographic thallium scan (9 patients, 10 MIs), and 50% of MIs were viable. The IPPA variables analyzed were: time to initial left ventricular (LV) uptake in the region of interest (ROI), the ratio of three-minute uptake in the ROI to three-minute LV uptake, three-minute clearing (counts/pixel) in the ROI (decrease in IPPA after initial uptake), and three-minute accumulation (increase in IPPA after initial uptake) in the ROI. Rules for detecting V were generated and applied to 10 healthy volunteers to determine normalcy. While three-minute uptake in nonviable MIs was only 67% of volunteers (P < 0.0001) and 75% of viable MIs, uptake alone identified only 50% of viable MIs and 75% of nonviable MIs. IPPA clearing, however, was > or = 13.5 counts/pixel in 10/12 (83%) of viable MIs, and IPPA accumulation > or = 6.75 counts/pixel identified one more viable MI, for a sensitivity for V of 11/12 (92%), with a specificity of 11/12 (92%), and a 100% normalcy rate. The authors conclude low-dose IPPA (five-minute acquisition with analysis of the first three minutes of data) has potential for providing rapid, inexpensive V data after MI. Since newer multicrystal cameras are mobile, IPPA scans can be done in emergency rooms or coronary care units generating information that might be useful in decisions regarding thrombolysis, angioplasty, or bypass surgery.


Assuntos
Coração/diagnóstico por imagem , Radioisótopos do Iodo , Iodobenzenos , Infarto do Miocárdio/diagnóstico por imagem , Estudos de Casos e Controles , Feminino , Câmaras gama , Humanos , Masculino , Pessoa de Meia-Idade , Sensibilidade e Especificidade , Radioisótopos de Tálio , Fatores de Tempo , Tomografia Computadorizada de Emissão de Fóton Único
15.
Eur J Oncol Nurs ; 4(1): 6-17; discussion 18-9, 2000 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-12849624

RESUMO

The demands of cancer treatment are particularly challenging for newly diagnosed adolescents. If attempts to cope with these demands are unsuccessful, adolescents may not comply with or may refuse treatment. As a result, their chances of survival are decreased. The purpose of this study, guided by the Adolescent Self-Sustaining Model, was to determine the effects of a three-part educational intervention designed to facilitate copying on psychological (hopefulness, hopelessness, self-esteem, self-efficacy and symptom distress) and clinical outcomes (treatment toxicity) among adolescents newly diagnosed with cancer. This two-site study used a longitudinal experimental two-group design with adolescents randomly assigned to the intervention or control group. Four measurement points spanning the first 6 months of treatment were included in the design. Of 93 eligible adolescents, 78 (46 females and 32 males) agreed to participate. No statistically significant differences between the intervention and control groups, or between male and female participants, were detected at any measurement point. Differences in scores over time within groups were noted. Explanations for the lack of group differences are offered, as are recommendations for strengthening the intervention and design for future testing.

16.
J Orthop Sports Phys Ther ; 29(6): 316-25; discussion 326-30, 1999 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-10370915

RESUMO

STUDY DESIGN: Observational study of static and dynamic foot postures in professional baseball players. BACKGROUND: Throughout the course of a professional baseball season, running, cutting, and sprinting activities can produce a breakdown in players' foot function, causing overuse injuries. OBJECTIVES: To investigate the relationship between static and dynamic foot postures; to determine the occurrence of abnormal foot postures in professional baseball players and the incidence of overuse injuries in the lower extremity; and to compare the foot postures of pitchers to those of positional players. METHODS AND MEASURES: The foot postures of 74 professional baseball players were evaluated at rest and during gait. Measures of static foot posture were obtained with a goniometer and included the subtalar neutral position, forefoot/rearfoot position, ankle joint dorsiflexion, tibial angle in standing, and calcaneal angle in standing. The FootTrak motion analysis system provided measures of dynamic foot posture (rearfoot supination and pronation) during the stance phase of gait. A questionnaire was completed by players who reported previous lower extremity injuries. The chi-square statistic was used to determine the associations between forefoot position (varus or valgus) and the amount of foot pronation during gait. RESULTS: The forefoot varus and calcaneal valgus in standing was significantly associated with the maximum pronation during the stance phase of gait. Of the 65 players who demonstrated excessive pronation (> 8 degrees), 28 (43%) also reported a previous lower extremity injury. No statistically significant difference occurred, however, between injured and uninjured players with respect to the mean values of static or dynamic foot posture. In addition, foot postures were not associated with a player's position. CONCLUSIONS: Selected measures of static rearfoot and forefoot postures may have value in predicting dynamic rearfoot movement during the stance phase of gait. Excessive pronation in the baseball players we studied was not found to be a significant contributing factor in the development of overuse injuries.


Assuntos
Beisebol/fisiologia , Pé/fisiologia , Postura/fisiologia , Pé/anatomia & histologia , Marcha/fisiologia , Humanos , Inquéritos e Questionários
17.
West J Nurs Res ; 21(5): 600-16; discussion 617-20, 1999 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-11512182

RESUMO

Hopefulness in adolescents with cancer serves critical functions related to the adolescents' sense of well-being and commitment to treatment. Given these critical functions, it is important to determine the essential characteristics of hopefulness, which include the degree and dynamism of hopefulness and the nature and attributes of hoped-for objects. The purposes of this two-site study were to describe the degree and dynamism of hopefulness at four time points during the first 6 months of adolescents' treatment for newly diagnosed cancer, to identify and describe the adolescents' hoped-for objects, and to evaluate potential relationships between the characteristics of hopefulness and patient gender, age, diagnosis, and time point in treatment. Seventy-eight adolescents completed the Hopefulness Scale for Adolescents, the Hopelessness Scale, and the Hopefulness Interview Question at each time point. Hopefulness scores were higher and hopelessness scores substantially lower than reported in other tested samples. Adolescents identified a total of 57 different hopes. Differences by age, gender, and diagnosis were found.


Assuntos
Atitude Frente a Saúde , Moral , Neoplasias/psicologia , Psicologia do Adolescente , Adolescente , Fatores Etários , Criança , Feminino , Humanos , Estudos Longitudinais , Masculino , Neoplasias/diagnóstico , Neoplasias/terapia , Pesquisa Metodológica em Enfermagem , Fatores Sexuais , Inquéritos e Questionários , Resultado do Tratamento
18.
J Genet Psychol ; 154(2): 167-75, 1993 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-8366329

RESUMO

This study compared the structure (i.e., stage) of moral judgments to dilemmas involving AIDS to the structure of moral judgment on Kohlberg's test to determine whether attitudes and opinions about AIDS affect level of moral judgment. Subjects included 40 men, who responded to (a) two standard dilemmas from Colby and Kohlberg's (1987) test of moral judgment, (b) two of Kohlberg's dilemmas ammended to involve AIDS, (c) a set of AIDS dilemmas derived from incidents reported in the media, (d) a set of questions tapping attitudes toward people with AIDS, and (e) Rubin and Peplau's (1975) just-world scale. Moral judgment was structurally consistent across the three sets of dilemmas, and only weakly related to attitudes towards AIDS and belief in a just world. Moral choices did not covary with moral stage. These results are consistent with Kohlberg's contention that moral judgment is organized in "structures of the whole."


Assuntos
Síndrome da Imunodeficiência Adquirida/psicologia , Atitude Frente a Saúde , Julgamento , Princípios Morais , Sorodiagnóstico da AIDS/psicologia , Síndrome da Imunodeficiência Adquirida/transmissão , Adolescente , Adulto , Criança , Empatia , Humanos , Masculino , Pessoa de Meia-Idade , Defesa do Paciente , Inventário de Personalidade , Quarentena/psicologia , Recusa em Tratar , Fatores de Risco
19.
Tenn Med ; 91(8): 313-6, 1998 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-9697403

RESUMO

Despite widespread introduction of Medicaid managed care (MMC), physicians have not been surveyed regarding its impact on patient care. This study documented physician experiences with MMC in Tennessee, where a statewide experimental managed care program (TennCare) delivers services through 12 capitated managed care organizations (MCOs). Practicing Tennessee American College of Physician (ACP) members (n = 1,181) were questioned regarding recent experience with the TennCare program, assessment of the program, and suggestions for improvement. The results, derived from 306 physician respondents (response rate 26%), were as expected, based on findings of a prior administrative focus group and independent surveys. Physicians' experiences were similar regardless of practice type. Most physicians rated the TennCare program as either fair (43%) or poor (42%) overall. The majority cited administrative complexity as a major problem that frequently adversely affected patient care. Physician experience suggests that administrative procedures and medication formularies should be streamlined and standardized to improve patient care.


Assuntos
Atitude do Pessoal de Saúde , Programas de Assistência Gerenciada/normas , Medicaid/normas , Avaliação de Resultados em Cuidados de Saúde , Química Farmacêutica/normas , Credenciamento/normas , Coleta de Dados , Humanos , Médicos , Padrões de Prática Médica/estatística & dados numéricos , Sociedades Médicas , Tennessee , Estados Unidos
20.
J Health Care Mark ; 10(3): 61-3; discussion 64-6, 1990 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-10107473

RESUMO

The authors attempt to expand the dialogue between the health care industry and the marketing discipline on perhaps the most crucial issue facing health care marketers today--AIDS. They offer a critique of a JHCM article by Ronald Paul Hill. Their intent is to prompt a reconsideration of the normative propositions Hill suggests for health care marketers in response to the AIDS crisis.


Assuntos
Síndrome da Imunodeficiência Adquirida/economia , Recursos em Saúde/provisão & distribuição , Marketing de Serviços de Saúde , Humanos , Estados Unidos
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