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1.
Artigo em Inglês | MEDLINE | ID: mdl-32071052

RESUMO

This study was conducted in treatment-naive adults with drug-susceptible pulmonary tuberculosis in Port-au-Prince, Haiti, to assess the safety, bactericidal activity, and pharmacokinetics of nitazoxanide (NTZ). This was a prospective phase II clinical trial in 30 adults with pulmonary tuberculosis. Twenty participants received 1 g of NTZ orally twice daily for 14 days. A control group of 10 participants received standard therapy over 14 days. The primary outcome was the change in time to culture positivity (TTP) in an automated liquid culture system. The most common adverse events seen in the NTZ group were gastrointestinal complaints and headache. The mean change in TTP in sputum over 14 days in the NTZ group was 3.2 h ± 22.6 h and was not statistically significant (P = 0.56). The mean change in TTP in the standard therapy group was significantly increased, at 134 h ± 45.2 h (P < 0.0001). The mean NTZ MIC for Mycobacterium tuberculosis isolates was 12.3 µg/ml; the mean NTZ maximum concentration (Cmax) in plasma was 10.2 µg/ml. Negligible NTZ levels were measured in sputum. At the doses used, NTZ did not show bactericidal activity against M. tuberculosis Plasma concentrations of NTZ were below the MIC, and its negligible accumulation in pulmonary sites may explain the lack of bactericidal activity. (This study has been registered at ClinicalTrials.gov under identifier NCT02684240.).


Assuntos
Antituberculosos/farmacocinética , Antituberculosos/uso terapêutico , Mycobacterium tuberculosis/efeitos dos fármacos , Nitrocompostos/farmacocinética , Nitrocompostos/uso terapêutico , Tiazóis/farmacocinética , Tiazóis/uso terapêutico , Tuberculose Pulmonar/tratamento farmacológico , Adulto , Antituberculosos/efeitos adversos , Feminino , Haiti , Humanos , Masculino , Testes de Sensibilidade Microbiana , Nitrocompostos/efeitos adversos , Escarro/microbiologia , Tiazóis/efeitos adversos , Adulto Jovem
2.
Anaesthesia ; 75 Suppl 1: e18-e27, 2020 01.
Artigo em Inglês | MEDLINE | ID: mdl-31903566

RESUMO

Article 25 of the United Nations' Universal Declaration of Human Rights enshrines the right to health and well-being for every individual. However, universal access to high-quality healthcare remains the purview of a handful of wealthy nations. This is no more apparent than in peri-operative care, where an estimated five billion individuals lack access to safe, affordable and timely surgical care. Delivery of surgery and anaesthesia in low-resource environments presents unique challenges that, when unaddressed, result in limited access to low-quality care. Current peri-operative research and clinical guidance often fail to acknowledge these system-level deficits and therefore have limited applicability in low-resource settings. In this manuscript, the authors priority-set the need for equitable access to high-quality peri-operative care and analyse the system-level contributors to excess peri-operative mortality rates, a key marker of quality of care. To provide examples of how research and investment may close the equity gap, a modified Delphi method was adopted to curate and appraise interventions which may, with subsequent research and evaluation, begin to address the barriers to high-quality peri-operative care in low- and middle-income countries.


Assuntos
Anestesiologia/métodos , Saúde Global , Assistência Perioperatória/métodos , Qualidade da Assistência à Saúde , Humanos
3.
Ann Burns Fire Disasters ; 30(4): 243-246, 2017 Dec 31.
Artigo em Inglês | MEDLINE | ID: mdl-29983673

RESUMO

Burns continue to present a significant public health problem, resulting in scores of preventable deaths and disability everyyear. The burden of burns disproportionately falls to the world's poor residing in low and middle-income countries (LMICs). Those who are burnt require timely access to acute burns management, including definitive surgical care. The current lack of access to safe and affordable surgical care with anaesthesia worldwide means that some 5 billion people do not have access to acute burns management, including definitive surgical care for burns, when needed most. Major limitations to access to burn care at healthcare facilities in LMICs include a lack of appropriately trained staff (including surgeons), appropriate equipment and resources. Burn prevention measures have been successful in reducing the incidence of burns and deaths in many developed countries, however there is currently a paucity of robust understanding of what works in LMICs to prevent burns. A combined effort to implement proven burn prevention strategies and address the unmet need for access to safe and affordable surgical care with anaesthesia is required to reduce the global burden of burns that still exists.


Les brûlures demeurent un problème de santé publique, en raison du nombre de décès et de handicaps préventibles survenant annuellement. Le risque de brûlure est particulièrement élevé parmi la population pauvre des pays en développement (PED). Les brûlés doivent recevoir des soins adaptés, y compris chirurgicaux, en temps et heure. Le manque actuel de structures chirurgicales (et anesthésiques) sécurisées et financièrement abordables place les 5 milliards d'humains les plus à risque en dehors des structures de prise en charge des brûlés. Les limitations à l'accès aux soins pour brûlés dans les PED comprennent l'absence de soignants entraînés (chirurgiens inclus), d'équipement, de moyens. Si les mesures de prévention ont permis de réduire l'incidence des brûlures et de leur mortalité dans nombre pays développés, on ne sait actuellement clairement ce qui serait efficace dans les PED. Des actions préventives combinées au développement de structures capables de prendre en charge correctement (à un coût raisonnable pour les patients) les brûlés sont nécessaire pour réduire le risque et les conséquences des brûlures, toujours très élevés dans les PED.

4.
Int J Tuberc Lung Dis ; 19(1): 50-7, 2015 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-25519790

RESUMO

SETTING: Port-au-Prince, Haiti. OBJECTIVE: To determine long-term effects of early vs. delayed initiation of antiretroviral therapy (ART) on immune recovery and tuberculosis (TB) risk in human immunodeficiency virus (HIV) infected individuals. DESIGN: Open-label randomized controlled trial of immediate ART in HIV-infected adults with CD4 counts between 200 and 350 cells/mm(3) vs. deferring ART until the CD4 count was <200 cells/mm(3). The primary comparisons were CD4 counts over time and risk for incident TB, with 5 years of follow-up. RESULTS: A total of 816 participants were enrolled, with 408 in each treatment arm. The early treatment group started ART within 2 weeks, while the deferred treatment group started ART a median of 1.3 years after enrollment. After 5 years, the mean CD4 count in the early treatment group was significantly higher than in the deferred treatment group (496 cells/mm(3), 95% confidence interval [CI] 477-515 vs. 373 cells/mm(3), 95%CI 357-389; P < 0.0001). TB risk was higher in the deferred treatment group (unadjusted HR 2.41, 95%CI 1.56-3.74; P < 0.0001) and strongly correlated with lower CD4 counts in time-dependent multivariate analysis. CONCLUSION: Delays in ART initiation for HIV-infected adults with CD4 counts of 200-350 cells/mm(3) can result in long-term immune dysfunction and persistent increased risk for TB.


Assuntos
Antirretrovirais/uso terapêutico , Contagem de Linfócito CD4 , Infecções por HIV/tratamento farmacológico , Tempo para o Tratamento/estatística & dados numéricos , Tuberculose/epidemiologia , Adulto , Terapia Antirretroviral de Alta Atividade , Esquema de Medicação , Feminino , Seguimentos , Infecções por HIV/complicações , Infecções por HIV/imunologia , Haiti , Humanos , Incidência , Masculino , Pessoa de Meia-Idade , Fatores de Risco , Fatores de Tempo , Tuberculose/imunologia
5.
Int J Obes Suppl ; 5(Suppl 2): S74-9, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-27152189

RESUMO

OBJECTIVES: Few studies have investigated the association between the full range of birth weight and the risk of childhood obesity in high-, middle- and low-income countries. The aim of the present study is to assess the association between different levels of birth weight and the risk of obesity among children aged 9-11 years in 12 countries. METHODS: A multinational, cross-sectional study of 5141 children aged 9-11 years was conducted in 12 countries. Height and weight were obtained using standardized methods. Time spent in moderate-to-vigorous physical activity (MVPA), sedentary and sleeping were objectively measured using 24-h, waist-worn accelerometer (Actigraph GT3X+) monitored for 7 days. Birth weight and other factors (regions, parental education, maternal history of gestational diabetes, children age, gender, breast feeding, gestational age, unhealthy diet scores and healthy diet scores) were collected by parental and children's questionnaires. Multilevel modeling was used to account for the nested nature of the data. RESULTS: The overall prevalence of obesity (BMI z-score>+2 s.d.) was 15.4% for boys and 10.0% for girls. There was a positive association between birth weight and BMI z-scores. The multivariable-adjusted odds ratios (ORs) of childhood obesity were significantly higher among children whose birth weights were 3500-3999 g (OR 1.45; 95% confidence interval (CI): 1.10-1.92), and >4000 g (OR 2.08; 95% CI: 1.47-2.93), compared with the reference group (2500-2999 g). The positive association between birth weight and the odds of childhood obesity was seen in girls, whereas a U-shaped association appeared in boys. CONCLUSIONS: High levels of birth weight, defined as birth weight ⩾3500 g, were associated with increased odds of obesity among 9-11-year-old children in 12 countries. However, sex differences in the association between birth weight and the risk of obesity need to be considered when planning interventions to reduce childhood obesity.

6.
Int J Obes (Lond) ; 38(5): 719-23, 2014 May.
Artigo em Inglês | MEDLINE | ID: mdl-23949614

RESUMO

BACKGROUND: Many adiposity traits have been related to health complications and premature death. These adiposity traits are intercorrelated but their underlying structure has not been extensively investigated. We report on the degree of commonality and specificity among multiple adiposity traits in normal-weight and moderately overweight adult males and females (mean body mass index (BMI)=22.9 kg m(-2), s.d.=2.4). METHODS: A total of 75 healthy participants were assessed for a panel of adiposity traits including leg, arm, trunk, total fat masses and visceral adipose tissue (VAT) derived from dual energy X-ray absorptiometry (DXA), hepatic and muscle lipids from proton magnetic resonance spectroscopy, fat cell volume from an abdominal subcutaneous adipose tissue biopsy (n=36) and conventional anthropometry (BMI and waist girth). Spearman's correlations were calculated and were subjected to factor analysis. RESULTS: Arm, leg, trunk and total fat masses correlated positively (r=0.78-0.95) with each other. VAT correlated weakly with fat mass indicators (r=0.24-0.31). Intrahepatic lipids (IHL) correlated weakly with all fat mass traits (r=0.09-0.34), whereas correlations between DXA depots and intramyocellular lipids (IMCL) were inconsequential. The four DXA fat mass measures, VAT, IHL and IMCL depots segregated as four independent factors that accounted for 96% of the overall adiposity variance. BMI and waist girth were moderately correlated with the arm, leg, trunk and total fat and weakly with VAT, IHL and IMCL. CONCLUSION: Adiposity traits share a substantial degree of commonality, but there is considerable specificity across the adiposity variance space. For instance, VAT, IHL and IMCL are typically poorly correlated with each other and are poorly to weakly associated with the other adiposity traits. The same is true for BMI and waist girth, commonly used anthropometric indicators of adiposity. These results do not support the view that it will be possible to identify adequate anthropometric indicators of visceral, hepatic and muscle lipid content in normal-weight and moderately overweight individuals.


Assuntos
Adipócitos/patologia , Adiposidade , Gordura Intra-Abdominal/patologia , Sobrepeso , Gordura Subcutânea/patologia , Absorciometria de Fóton , Adulto , Composição Corporal , Índice de Massa Corporal , Feminino , Humanos , Lipídeos , Masculino , Valor Preditivo dos Testes , Circunferência da Cintura
7.
Nutr Metab Cardiovasc Dis ; 22(10): 877-82, 2012 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-22494807

RESUMO

AIMS: To determine if customary lower serum vitamin D concentrations in healthy African American (AA) adults are associated with modest elevations in fasting plasma glucose (FPG) and/or resting blood pressure (BP). Numerous health disparities between African American (AA) and Caucasian American (CA) adults, especially those which increase cardiovascular morbidity and mortality, have been attributed to lower serum vitamin D concentrations in the AA. Prediabetes (PreDM) and prehypertension (PreHTN) are significantly more prevalent in healthy disease free CA adults with serum vitamin D concentrations below the 75th percentile for the Caucasian cohort. We hypothesized that despite overall lower serum vitamin D concentrations in AA, an increase in the prevalence for PreDM and PreHTN would be seen in those with low vitamin D levels. METHODS AND RESULTS: Disease free AA adults in the National Health and Nutrition Examination Survey 2001-2006 were assessed. PreDM and PreHTN were diagnosed using the ADA and JNC 7 criteria: (FPG) 100-125 mg/dL and resting systolic (SBP) 120-139 and/or diastolic (DBP) 80-89 mm Hg, respectively. Logistic regression was employed to assess effects of low vitamin D concentrations on the odds for PreDM and PreHTN (n = 621). Age, gender and BMI adjusted odds ratio for co-morbid PreDM and PreHTN in AA men (n = 343) and women (n = 278) with vitamin D levels ≤45.4 versus >45.4 nmol/L was 2.02 (1.11, 3.68), (p < 0.021). CONCLUSIONS: Evaluating serum vitamin D levels, with consideration for supplementation in seemingly healthy AA adults with prediabetes, prehypertension, or co-existing prediabetes and prehypertension, has merit.


Assuntos
Negro ou Afro-Americano , Estado Pré-Diabético/epidemiologia , Pré-Hipertensão/epidemiologia , Deficiência de Vitamina D/epidemiologia , Vitamina D/sangue , Adulto , Idoso , Glicemia/análise , Pressão Sanguínea , Comorbidade , Estudos Transversais , Suplementos Nutricionais , Feminino , Humanos , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Inquéritos Nutricionais , Estado Pré-Diabético/sangue , Estado Pré-Diabético/fisiopatologia , Pré-Hipertensão/sangue , Pré-Hipertensão/fisiopatologia , Prevalência , Fatores de Risco , Deficiência de Vitamina D/fisiopatologia , População Branca , Adulto Jovem
8.
Food Chem Toxicol ; 49(12): 3319-27, 2011 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-21939727

RESUMO

To characterize the subchronic oral toxicity of resveratrol, CD rats received daily gavage doses of 0, 200, 400, or 1000 mg resveratrol/kg/day, and beagle dogs received daily capsule doses of 0, 200, 600, or 1200 mg resveratrol/kg/day for 90 days. Resveratrol induced only minimal toxicity, consisting of dose-related reductions in body weight gain in female rats and both sexes of dogs, and a statistically significant increase in bilirubin levels in rats at the 1000 mg/kg/day dose. Clinical observations, hematology, ophthalmology, neurotoxicity evaluations (functional observational batteries), organ weights, and gross pathology provided no biologically significant evidence of resveratrol toxicity in either species. In rats, the high dose of resveratrol reduced the incidence of cardiomyopathy; no other microscopic changes were seen. Histopathologic changes in dogs were limited to minimal inflammatory infiltrates in the kidney and urinary bladder, which were not considered toxicologically significant. A cardiovascular safety pharmacology (telemetry) study in dogs revealed no evidence of resveratrol toxicity. Based on body weight effects, the No Observed Adverse Effect Level (NOAEL) for resveratrol was 200mg/kg/day in rats and 600 mg/kg/day in dogs. The apparent cardioprotective activity of resveratrol in rats demonstrates that its potentially beneficial activities may extend beyond efficacy in cancer prevention.


Assuntos
Antineoplásicos Fitogênicos/farmacologia , Cardiotônicos/farmacologia , Polifenóis/farmacologia , Estilbenos/toxicidade , Testes de Toxicidade Subcrônica/métodos , Administração Oral , Animais , Peso Corporal/efeitos dos fármacos , Cães , Relação Dose-Resposta a Droga , Avaliação Pré-Clínica de Medicamentos , Feminino , Rim/efeitos dos fármacos , Rim/metabolismo , Masculino , Nível de Efeito Adverso não Observado , Tamanho do Órgão/efeitos dos fármacos , Ratos , Resveratrol , Estilbenos/administração & dosagem , Bexiga Urinária/efeitos dos fármacos , Bexiga Urinária/metabolismo
9.
Nutr Diabetes ; 1: e2, 2011 Jan 31.
Artigo em Inglês | MEDLINE | ID: mdl-23154294

RESUMO

OBJECTIVE: Accumulation of adipose tissue is associated with cardiometabolic risks. Although visceral adipose tissue (VAT) has been strongly implicated in this relationship, there is still some debate regarding the contribution of abdominal subcutaneous adipose tissue (SAT). The purpose of this study was to determine the contribution of abdominal SAT to cardiometabolic risk factors, independent of total and visceral adiposity. These relationships were assessed in Caucasian and African Americans. DESIGN: It is a cross-sectional analysis of the Pennington Center Longitudinal Study. SUBJECTS: Data were extracted from 1246 participants. Total body fat mass (FM) was measured by dual-energy X-ray absorptiometry, whereas abdominal VAT and SAT areas (cm(2)) were measured with computed tomography. The cardiometabolic risk factors included resting blood pressure (BP), fasting blood glucose and triglyceride concentrations and high-density lipoprotein cholesterol (HDL-C). RESULTS: Positive relationships across tertiles of VAT were seen for the participants with high glucose, high BP and low HDL-C (P<0.043). There was also a significant increase in the percentage of participants with two or more cardiometabolic risk factors across most tertiles of abdominal SAT (P<0.042). Logistic regression analysis showed that in univariate models, all adiposity measures were significantly associated with increased odds of having all risk factors in men and women. In multivariate models, VAT was significantly associated with most risk factors across gender. Abdominal SAT and FM (odds ratios (ORs) 1.3-2.1; all P<0.05) were associated with fewer risk factors after accounting for VAT. VAT (OR=5.9 and 5.3) and SAT (OR=2.0 and 1.8) were both associated with higher odds of the presence of two or more cardiometabolic risk factors in both males and females (P<0.001). CONCLUSION: The data suggest that abdominal SAT is not protective against unfavorable cardiometabolic risk profiles. These conclusions were consistent across ethnic groups.

11.
Food Chem Toxicol ; 46(3): 1068-78, 2008 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-18082924

RESUMO

Se-methylselenocysteine (MSC) is an organoselenium compound being developed for breast cancer chemoprevention. To characterize MSC toxicity, CD rats received daily gavage doses of 0, 0.5, 1.0, or 2.0 mg/kg/day (0, 3, 6, or 12 mg/m(2)/day), and beagle dogs received daily gavage doses of 0, 0.15, 0.3, or 0.6 mg/kg/day (0, 3, 6, or 12 mg/m(2)/day) for 28 days. In rats, MSC induced dose-related hepatomegaly in both sexes; mild anemia, thrombocytopenia, and elevated liver enzymes were observed in high dose females only. Microscopic pathology included hepatocellular degeneration (high dose males, all doses in females); arrested spermatogenesis (high dose males); and atrophy of corpora lutea (middle and high dose females). In dogs, MSC induced mild anemia in middle and high dose males, and in high dose females. Toxicologically significant microscopic lesions in dogs were seen only in the liver (peliosis and vacuolar degeneration in high dose males, midzonal necrosis in males in all dose groups). Based on liver pathology seen in female rats in all dose groups, the no observed adverse effect level (NOAEL) for MSC in rats is <0.5mg/kg/day. Based on alterations in hematology parameters and liver morphology in male dogs in all dose groups, the NOAEL for MSC in dogs is <0.15 mg/kg/day.


Assuntos
Anticarcinógenos/toxicidade , Neoplasias da Mama/prevenção & controle , Cisteína/análogos & derivados , Compostos Organosselênicos/toxicidade , Administração Oral , Animais , Anticarcinógenos/administração & dosagem , Cisteína/administração & dosagem , Cisteína/toxicidade , Cães , Feminino , Fígado/efeitos dos fármacos , Fígado/patologia , Masculino , Compostos Organosselênicos/administração & dosagem , Ratos , Selenocisteína/análogos & derivados
12.
Comput Methods Programs Biomed ; 89(1): 50-5, 2008 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-18037189

RESUMO

Correct analysis and interpretation of longitudinal (cohort) studies with partially censored time-to-event data requires that the cumulative count of events and censored observations as well as the number at risk be calculated at appropriate time points (for example, every year), by baseline group or stratum. We present here a simple SAS program, for use in situations in which competing risks do not need to be accounted for, that calculates, by baseline group or stratum, the cumulative event count, cumulative event probability (with upper and lower 95% confidence limits), and number at risk at selected time points that can be chosen by the user. We demonstrate the use of the program in the analysis of longitudinal time-to-event data from a prospective study, the Atherosclerosis Risk In Communities (ARIC) Study, for four groups and a 10-year follow-up. The SAS code presented here is easy to follow and modify and can be incorporated quickly by the user for immediate use. It provides an especially valuable tool for less experienced SAS users.


Assuntos
Risco , Software , Idoso , Aterosclerose/epidemiologia , Aterosclerose/etiologia , Estudos de Coortes , Biologia Computacional , Intervalos de Confiança , Feminino , Humanos , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Probabilidade , Estudos Prospectivos
13.
Toxicol Ind Health ; 23(2): 65-74, 2007 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-18203558

RESUMO

Androstenedione, an anabolic steroid used to enhance athletic performance, was administered in corn oil by gastric intubation once daily in the morning to nonpregnant female rats at a dose of 5 or 60 mg/kg/day, beginning two weeks before mating and continuing through gestation day (GD) 19. On GD 20, the distribution of androstenedione and other steroid metabolites was investigated in the maternal plasma and target organs, including brain and liver. The concentration of estradiol in plasma approached a statistically significant increase after treatment as compared with the controls, whereas the levels of androstenedione, testosterone and progesterone were not significantly different from the controls. In the liver, the concentrations of androstenedione and estradiol only were increased in a dose-related manner. None of these steroids was detectable in the brain. Androstenedione treatment also produced changes in the level of selected free fatty acids (FFAs) in the maternal blood, brain, liver and fetal brain. The concentrations of palmitic acid (16:0) and stearic acid (18:0) in the plasma were not significantly different between the controls and treated rats. However, oleic acid (18:1), linoleic acid (18:2) and docosahexaenoic acid (DHA, 22:6) were 17.94 +/- 2.06 microg/ml, 24.23 +/- 2.42 microg/ml and 4.08 +/- 0.53 microg/ml, respectively, in the controls, and none of these fatty acids was detectable in the treated plasma. On the other hand, palmitic, stearic, oleic, linoleic and DHA were present in both control and treated livers. Among the FFAs in liver, linoleic and DHA were increased 87% and 169%, respectively, over controls. Palmitic, stearic and oleic acids were not significantly affected by the 60 mg/kg treatment. These were present in both control maternal and fetal brains, whereas linoleic acid was found only in fetal brain control. DHA was present only in the control maternal brain (0.02 +/- 0.02 microg/mg protein) and fetal brain (0.24 +/- 0.15 microg/mg protein). The results indicated that androstenedione exhibits significantly different effects on the FFA composition among target organs during pregnancy.


Assuntos
Anabolizantes/farmacocinética , Androstenodiona/farmacocinética , Estradiol/sangue , Ácidos Graxos não Esterificados/metabolismo , Fígado/metabolismo , Anabolizantes/administração & dosagem , Análise de Variância , Androstenodiona/administração & dosagem , Animais , Encéfalo/efeitos dos fármacos , Encéfalo/metabolismo , Relação Dose-Resposta a Droga , Feminino , Feto/efeitos dos fármacos , Feto/metabolismo , Ácidos Linoleicos/metabolismo , Fígado/efeitos dos fármacos , Troca Materno-Fetal , Gravidez , Ratos , Distribuição Tecidual
14.
Cochrane Database Syst Rev ; (1): CD001230, 2003.
Artigo em Inglês | MEDLINE | ID: mdl-12535405

RESUMO

BACKGROUND: MSM remain at great risk for HIV infection. Program planners and policy makers need descriptions of interventions and quantitative estimates of intervention effects to make informed decisions concerning prevention efforts. OBJECTIVES: 1. To locate and describe outcome studies evaluating the effects of behavioral and social interventions targeting MSM. 2. To summarize the effectiveness of these interventions among MSM. 3. To stratify results by characteristics of interventions and participants. 4. To identify gaps and indicate future research, policy, and practice needs. SEARCH STRATEGY: We searched electronic databases (MedLine, PsycInfo, etc.); several current journals (e.g., AIDS, AIDS and Behavior, AIDS Education and Prevention, American Journal of Public Health, Journal of Acquired Immune Deficiency Syndromes, etc.); manuscripts submitted by researchers; bibliographies of relevant articles; and other published reviews, for published and unpublished reports from 1988 through 1997. SELECTION CRITERIA: Studies were considered in scope if they examined the effects of behavioral interventions to reduce risk for HIV or STD transmission. We reviewed studies in scope for criteria of outcome relevance (measurement of at least one of a list of behavioral or biologic outcomes, e.g., unprotected sex or incidence of HIV infections) and methodologic rigor (randomized controlled trials or certain strong quasi-experimental designs with comparison groups). DATA COLLECTION AND ANALYSIS: As of June 1998 we had identified 13 eligible studies. Twelve studies (7 trials of small group interventions, 3 community-level interventions, and 2 individual level interventions) reported intervention effects on unprotected sex. Because few studies reported effects on condom use (3 studies), number of sex partners without regard to condom use (4 studies), or HIV or STD incidence (1 study in which no infections occurred) we do not address these outcomes at this time. We present those analyses which can be performed in the current Cochrane RevMan software, followed by more complete analyses that permit inclusion of community-level studies, adjustment for baseline conditions, calculation of effect sizes from a wider variety of statistics (e.g., an F-statistic from a one-way ANOVA), and simultaneous meta-analysis of continuous and dichotomous outcomes (Johnson 2002b). We translate the summary effect to reduction in risk behavior based on the background prevalence of unprotected sex. Finally we provide analyses stratified by intervention content (interpersonal skills addressed or not), intervention format (community vs small group or individual) and mean age of participants (23 to 31 vs. 32 to 36). MAIN RESULTS: A summary measure of intervention effects on reducing unprotected sex was favorable (odds ratio = 0.73) and statistically significant (CI, 0.60 to 0.88), corresponding to a 23% reduction in the proportion of men engaging in unprotected sex. Effects were homogeneous among studies, but were slightly more favorable among community-level interventions, those that served populations in their 20s rather than their 30s, and those that promoted interpersonal skills. REVIEWER'S CONCLUSIONS: These studies demonstrate that interventions can promote risk reduction among MSM. Yet given the epidemiology of HIV in Pattern I countries, the small number of rigorous controlled intervention trials for this population is striking. Many more rigorous evaluations of HIV prevention efforts with MSM are needed to ascertain with confidence the effects of specific intervention components, population characteristics, and methodologic features.


Assuntos
Infecções por HIV/prevenção & controle , Homossexualidade Masculina , Conhecimentos, Atitudes e Prática em Saúde , Humanos , Masculino , Ensaios Clínicos Controlados Aleatórios como Assunto , Assunção de Riscos , Sexo Seguro , Infecções Sexualmente Transmissíveis/prevenção & controle
17.
AIDS ; 15(14): 1875-9, 2001 Sep 28.
Artigo em Inglês | MEDLINE | ID: mdl-11579251

RESUMO

OBJECTIVE: To describe the integration of tuberculosis screening into the activities of an HIV voluntary counselling and testing (VCT) centre in a country with endemic tuberculosis. SETTING: An HIV VCT centre in Port au Prince, Haiti. DESIGN: All patients presenting for HIV VCT who reported cough received same-day evaluation for active tuberculosis. Of the 1327 adults presenting to the centre for the first time between January and April 1997, 263 (20%) reported cough and of these 241 (92%) were evaluated. RESULTS: Of the 241 patients evaluated for cough, 76 (32%) were diagnosed with pulmonary tuberculosis. Of the 76 patients diagnosed with pulmonary tuberculosis, 28 (37%) had a positive smear for acid-fast bacilli (AFB), 14 (18%) had a negative AFB smear but a positive sputum culture for Mycobacterium tuberculosis, and 34 (45%) had culture-negative tuberculosis. Also, 31 out of 241 (13%) VCT clients evaluated for cough were diagnosed with bacterial pneumonia. CONCLUSION: This report confirms that in areas with a high HIV and tuberculosis prevalence, a high proportion of VCT clients have active pulmonary tuberculosis. The integration of tuberculosis screening offers several benefits, including the diagnosis and treatment of large numbers of individuals with tuberculosis, a decreased risk of nosocomial tuberculosis transmission, and the opportunity to provide tuberculosis prophylaxis to HIV-positive patients in whom tuberculosis has been excluded. Future studies are needed to determine the cost-effectiveness of integrated tuberculosis and HIV VCT services, and whether integration should be recommended in all countries with high HIV and tuberculosis rates.


Assuntos
Sorodiagnóstico da AIDS , Prestação Integrada de Cuidados de Saúde , Programas de Rastreamento , Tuberculose Pulmonar/diagnóstico , Adulto , Aconselhamento , Infecções por HIV/epidemiologia , Haiti , Humanos , Mycobacterium tuberculosis/isolamento & purificação , Escarro/microbiologia , Tuberculose Pulmonar/epidemiologia
18.
J Biopharm Stat ; 11(1-2): 23-33, 2001.
Artigo em Inglês | MEDLINE | ID: mdl-11459440

RESUMO

Bowker's test, a generalization of McNemar's test, performs well under the hypothesis of symmetry, but the estimator of variance used in the test is biased when the table is asymmetric and this calls into question the test's performance in non-null situations. We seek an alternative to Bowker's test in search of methods for simultaneous inference that are valid when the hypothesis of symmetry is false. We apply multivariate normal theory to develop chi-square tests and simultaneous confidence intervals for inferences concerning symmetry in k X k contingency tables. We propose a modified Wald statistic as a competitor to Bowker's test. We also proffer quadratic estimators of confidence intervals. In large samples, the recommended test statistic rejects the null hypothesis at the stated level of significance when the null hypothesis is true and always rejects with greater power than Bowker's test. The proffered interval estimators provide good simultaneous coverage of the pairwise differences between the population proportions at the stated confidence level.


Assuntos
Biometria/métodos , Distribuição de Qui-Quadrado , Intervalos de Confiança , Método de Monte Carlo , Análise Multivariada
19.
Am J Public Health ; 91(1): 138-41, 2001 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-11189809

RESUMO

OBJECTIVES: This study evaluated a novel approach to the delivery of directly observed therapy (DOT) for tuberculosis in Haiti. METHODS: A total of 194 patients (152 HIV seropositive, 42 HIV seronegative) received daily unsupervised triple-drug therapy for 4 to 8 weeks, followed by twice-weekly 2-drug therapy for the remainder of the 6-month period. DOT was deferred until initiation of the twice-weekly phase. RESULTS: A total of 169 of 194 patients (87.1%) completed the 6-month course. The program of deferred DOT had an effectiveness of 85%. Overall cost was reduced by approximately 40%. CONCLUSIONS: Flexible approaches to DOT, integrating behavioral knowledge, cost considerations, and practicality may improve completion rates and program effectiveness.


Assuntos
Antituberculosos/administração & dosagem , Soropositividade para HIV , Cooperação do Paciente , Tuberculose Pulmonar/tratamento farmacológico , Adulto , Antituberculosos/economia , Comorbidade , Análise Custo-Benefício , Esquema de Medicação , Doenças Endêmicas , Infecções por HIV/epidemiologia , Haiti/epidemiologia , Humanos , Pessoa de Meia-Idade , Avaliação de Programas e Projetos de Saúde , Tuberculose Pulmonar/economia , Tuberculose Pulmonar/epidemiologia
20.
Clin Infect Dis ; 32(2): 255-62, 2001 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-11170915

RESUMO

The adequacy of fellowship training in the field of infectious diseases was assessed by means of a survey of recently graduated fellows. Surveys were mailed to all individuals who had passed the American Board of Internal Medicine's board certification examination in infectious diseases since 1992. A total of 666 completed surveys were returned by the deadline (response rate, 36%). Although most recent graduates thought that training in the standard components of clinical infectious diseases was adequate, only 50% thought that training in infection control was adequate. Fewer than 1 in 3 believed that they had received adequate training in the business aspects of infectious diseases practice. The adequacy and duration of research training were linked to ultimate career choice. These results form the basis for the Infectious Diseases Society of America's new initiatives to assist with more-diversified and relevant fellowship training.


Assuntos
Educação de Pós-Graduação em Medicina , Bolsas de Estudo , Avaliação de Programas e Projetos de Saúde , Coleta de Dados , Feminino , Apoio Financeiro , Humanos , Controle de Infecções/tendências , Masculino , Microbiologia/educação , Estados Unidos
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