Socioeconomic inequalities and measles immunization coverage in Ecuador: A spatial analysis.

INTRODUCTION/BACKGROUND: Inequalities in measles immunization coverage facilitate the onset of outbreaks. This study aimed to quantify socioeconomic inequalities associated with measles immunization coverage at the population level. METHODS: An ecological study was performed using two datasets: the results of a measles immunization survey performed in Ecuador, in 2011, and socioeconomic data from the 2010 census, aggregated by canton. The survey included 3,140,799 people aged 6 months to 14 years living in 220 cantons of Ecuador. Vaccinated children were considered those who received at least one dose of vaccine against measles. Multiple spatial regression was performed to identify socioeconomic inequalities associated with measles immunization coverage. The slope index of inequality and the relative index of inequality were calculated. RESULTS: Vaccination coverage against measles was inversely associated with unsatisfied basic needs in urban areas (P < 0.01) and the proportions of indigenous and African-Ecuadorian residents in the canton (P = 0.015), and directly associated with unemployment rate in the canton (P = 0.037). The distribution of immunization coverage across the cantons was heterogeneous, indicating spatial dependence. The non-immunization rate was 71% higher in the poorer cantons than in the upper stratum cantons (prevalence ratio 1.71; 95%CI: 1.69-1.72). A difference of 10.6 percentage points was detected in immunization coverage between cantons with the best vs. worst socioeconomic level, according to the slope index of inequality. The relative index of inequality revealed that immunization coverage was 1.12 times higher in cantons with the highest socioeconomic level vs. cantons with the lowest socioeconomic level. CONCLUSIONS: The spatial dependence between measles vaccination coverage and socioeconomic disparities suggests clusters of vulnerable populations for outbreaks. Health and social inequalities must be considered to achieve and maintain measles elimination.

The Porto Alegre paradox: social determinants and tuberculosis incidence.

INTRODUCTION: The incidence of tuberculosis (TB) is strongly associated with social and economic factors. The city of Porto Alegre, in the South of Brazil, has one of the highest Human Development Index and Gross Domestic Product per capita of the country. One would expect that the incidence of tuberculosis in such a place were low. However, the city has very high rates of incidence, the highest among Brazilian capitals. This paradox prompted this work, whose objectives were to analyze the spatial distribution of the incidence rate of bacilliferous pulmonary tuberculosis throughout the neighborhoods of Porto Alegre and its association with socioeconomic indicators. METHODS: Ecological non-concurrent cohort study. The units of analysis were the neighborhoods of the city. The average annual incidence of bacilliferous pulmonary tuberculosis for the period 2000 to 2005 and seven socioeconomic variables were analyzed, with information obtained from the IBGE and the Mortality Information System. Spatial techniques and multivariate analyzes were used to check associations. Inequalities were also measured. RESULTS: The spatial distribution of the incidence rate of bacilliferous pulmonary tuberculosis is very similar, i.e., associated with the distribution of socioeconomic factors. The Relative Index of Inequality was 7.9, showing the great difference in the incidence rate between neighborhoods. CONCLUSION: Porto Alegre presents high incidence rates of bacilliferous pulmonary tuberculosis, which distribution through the neighborhoods of the city is associated with socioeconomic factors. The city's high rate is due to the extremely high incidence rates in its poorest neighborhoods. The authors raise hypotheses and suggest interventions.

Retreatment of tuberculosis patients in the city of Porto Alegre, Brazil: outcomes.

OBJECTIVE: To describe the outcomes of retreatment in tuberculosis patients receiving the regimen known, in Brazil, as regimen 3 (streptomycin, ethambutol, ethionamide, and pyrazinamide for 3 months + ethambutol and ethionamide for 9 months) after treatment failure with the basic regimen (rifampin, isoniazid, and pyrazinamide for 2 months + rifampin and isoniazid for 4 months). METHODS: A descriptive, uncontrolled, historical cohort study involving adult tuberculosis patients treated with regimen 3. We evaluated adverse drug effects, recurrence, treatment outcomes, and associated factors. RESULTS: The study included 229 patients. The overall cure rate was 62%. For the patients who used the medications regularly and those who did not, the cure rate was 88% and 31%, respectively. Adverse events occurred in 95 patients (41.5%), and most of those events were related to the gastrointestinal tract. In the five-year follow-up period, relapse occurred in 17 cases (12.0%). CONCLUSIONS: Overall, the outcomes of treatment with regimen 3 were unsatisfactory, in part because this regimen was administered to a selected population of patients at high risk for noncompliance with treatment, as well as because it presents high rates of adverse effects, especially those related to the gastrointestinal tract, which might be caused by ethionamide. However, for those who took the medications regularly, the cure rate was satisfactory. The recurrence rate was higher than that recommended in international consensus guidelines, which might be attributable to the short (12-month) treatment period. We believe that regimen 3, extended to 18 months, represents an option for patients with proven treatment compliance.

[Patterns of variation in the infant mortality rate in Rio Grande do Sul State, Brazil: comparison of empirical Bayesian and fully Bayesian approaches]. / Visualização dos padrões de variação da taxa de mortalidade infantil no Rio Grande do Sul, Brasil: comparação entre as abordagens Bayesiana Empírica e Totalmente Bayesiana.

Infant mortality is considered a sensitive health indicator, and knowledge of its geographical profile is essential for formulating appropriate public health policies. Disease mapping aims to describe the geographical distribution of disease incidence and mortality rates. Due to the heavy instability of crude rates in small areas, methods involving Bayesian smoothing of rates are used, drawing on information for the whole area or neighborhood to estimate the event rate. The current study compares empirical Bayesian (EB) and fully Bayesian (FB) methods for infant mortality rates (accumulated data from 2001 to 2004) in Rio Grande do Sul State, Brazil. This study highlights the advantages of Bayesian estimators for viewing and interpreting maps. For the problem at hand, EB and FB methods showed quite similar results and had the great advantage of easy use by health professionals, since they evenly highlight the main spatial patterns in the mortality rate in the State during the target period.

Desfechos do retratamento de pacientes com tuberculose com o uso do esquema 3 em Porto Alegre, Brasil / Retreatment of tuberculosis patients in the city of Porto Alegre, Brazil: outcomes

OBJETIVO: Descrever os desfechos do retratamento de pacientes com tuberculose com o uso do esquema 3 (estreptomicina, etambutol, etionamida e pirazinamida por 3 meses + etambutol e etionamida por 9 meses) devido à falência do tratamento com o esquema básico (rifampicina, isoniazida e pirazinamida por 2 meses + rifampicina e isoniazida por 4 meses). MÉTODOS: Estudo descritivo de coorte histórica, não controlada, com adultos que foram tratados com o esquema 3. Foram avaliados os desfechos desse tratamento, as reações adversas aos fármacos, as recidivas e os fatores associados. RESULTADOS: Foram incluídos no estudo 229 pacientes. A taxa de cura geral foi de 62 por cento. Entre os pacientes que usaram a medicação regularmente e aqueles que a usaram irregularmente, a taxa de cura foi de 88 por cento e 31 por cento, respectivamente. Observaram-se reações adversas em 95 pacientes (41,5 por cento), principalmente digestivas. Ocorreram 17 recidivas (12,0 por cento) nos cinco anos de seguimento. CONCLUSIONS: Os desfechos com o uso do esquema 3, em geral, não foram satisfatórios, pois esse esquema foi aplicado em uma população selecionada com alto risco de não adesão ao tratamento e apresenta altas taxas de reações adversas, especialmente as de tipo digestivo, possivelmente causadas pela etionamida. No entanto, para aqueles que conseguiram tomar a medicação regularmente, a taxa de cura foi satisfatória. A taxa de recidiva foi superior àquela preconizada por consensos internacionais, possivelmente devido ao tempo de tratamento curto (apenas 12 meses). Acreditamos que o esquema 3 estendido para 18 meses poderia ser uma alternativa para pacientes com comprovada adesão ao tratamento.

OBJECTIVE: To describe the outcomes of retreatment in tuberculosis patients receiving the regimen known, in Brazil, as regimen 3 (streptomycin, ethambutol, ethionamide, and pyrazinamide for 3 months + ethambutol and ethionamide for 9 months) after treatment failure with the basic regimen (rifampin, isoniazid, and pyrazinamide for 2 months + rifampin and isoniazid for 4 months). METHODS: A descriptive, uncontrolled, historical cohort study involving adult tuberculosis patients treated with regimen 3. We evaluated adverse drug effects, recurrence, treatment outcomes, and associated factors. RESULTS: The study included 229 patients. The overall cure rate was 62 percent. For the patients who used the medications regularly and those who did not, the cure rate was 88 percent and 31 percent, respectively. Adverse events occurred in 95 patients (41.5 percent), and most of those events were related to the gastrointestinal tract. In the five-year follow-up period, relapse occurred in 17 cases (12.0 percent). CONCLUSIONS: Overall, the outcomes of treatment with regimen 3 were unsatisfactory, in part because this regimen was administered to a selected population of patients at high risk for noncompliance with treatment, as well as because it presents high rates of adverse effects, especially those related to the gastrointestinal tract, which might be caused by ethionamide. However, for those who took the medications regularly, the cure rate was satisfactory. The recurrence rate was higher than that recommended in international consensus guidelines, which might be attributable to the short (12-month) treatment period. We believe that regimen 3, extended to 18 months, represents an option for patients with proven treatment compliance.

Visualização dos padrões de variação da taxa de mortalidade infantil no Rio Grande do Sul, Brasil: comparação entre as abordagens Bayesiana Empírica e Totalmente Bayesiana / Patterns of variation in the infant mortality rate in Rio Grande do Sul State, Brazil: comparison of empirical Bayesian and fully Bayesian approaches

A mortalidade infantil é um sensível indicador de saúde. Conhecer o seu perfil geográfico auxilia na formulação de estratégias de saúde pública. O mapeamento de doenças tem por objetivo descrever a distribuição geográfica das taxas de mortalidade ou incidência de doenças por intermédio de mapas. Em razão da alta instabilidade das taxas brutas quando há pequenas áreas, utilizam-se os métodos de suavização bayesiana, que se valem de informações de toda a região ou da vizinhança para estimar as taxas. O artigo faz a comparação entre os métodos Bayesiano Empírico e Totalmente Bayesiano para as taxas de mortalidade infantil (dados acumulados de 2001 a 2004) no Rio Grande do Sul, Brasil. O trabalho aponta as vantagens do uso dos estimadores bayesianos na visualização espacial dos mapas. Os métodos Bayesianos Empíricos apresentaram resultados muito semelhantes aos dos métodos Totalmente Bayesianos e possuem a grande vantagem de ser de fácil utilização por profissionais da área de saúde, destacando igualmente os principais padrões espaciais da taxa de mortalidade no Rio Grande do Sul no período estudado.

Infant mortality is considered a sensitive health indicator, and knowledge of its geographical profile is essential for formulating appropriate public health policies. Disease mapping aims to describe the geographical distribution of disease incidence and mortality rates. Due to the heavy instability of crude rates in small areas, methods involving Bayesian smoothing of rates are used, drawing on information for the whole area or neighborhood to estimate the event rate. The current study compares empirical Bayesian (EB) and fully Bayesian (FB) methods for infant mortality rates (accumulated data from 2001 to 2004) in Rio Grande do Sul State, Brazil. This study highlights the advantages of Bayesian estimators for viewing and interpreting maps. For the problem at hand, EB and FB methods showed quite similar results and had the great advantage of easy use by health professionals, since they evenly highlight the main spatial patterns in the mortality rate in the State during the target period.

[Accuracy of the Mortality Information System team in the specification of underlying cause of death in a State capital in southern Brazil]. / Acurácia da equipe do Sistema de Informações sobre Mortalidade na seleção da causa básica do óbito em capital no Sul do Brasil.

This cross-sectional study aimed to investigate the quality of data on underlying cause of death as completed on the death certificate by the attending physician, as well as the accuracy of the Mortality Information System (MIS) team in Porto Alegre, Rio Grande do Sul State, Brazil, in specification of the cause. 950 hospital deaths were investigated, using systematic sampling. A new death certificate (DC) was completed with data collected from hospital files, and was compared to the original DC and the MIS DC for underlying cause of death. Disagreement between the original DC and new DC occurred in 16.1% of cases. Of the 103 original DCs containing errors, the MIS identified 64.1%. Among those correctly completed, 195 were identified by the MIS as containing problems. Among the 261 selected and investigated by the MIS, there was agreement in modification of the underlying cause of death between the MIS and the search in 76.8% of cases, and a loss of opportunity for qualification in 23.2%. Among the 198 non-modified DCs, 5.1% should have been modified, and 94.9% were correctly maintained. The sensitivity of the MIS in the identification of problems with underlying cause of death was 64.1%, and specificity was 75.5%.

Acurácia da equipe do Sistema de Informações sobre Mortalidade na seleção da causa básica do óbito em capital no Sul do Brasil / Accuracy of the Mortality Information System team in the specification of underlying cause of death in a State capital in southern Brazil

Estudo transversal com o objetivo de analisar a qualidade do preenchimento da causa básica do óbito pelo médico e a acurácia da equipe do Sistema de Informações sobre Mortalidade (SIM) de Porto Alegre, Rio Grande do Sul, Brasil, na sua seleção. Com amostragem sistemática, foram investigados 950 óbitos hospitalares. Uma Declaração de Óbito (DO) nova foi preenchida com dados coletados nos prontuários hospitalares e comparada com a DO original e DO do SIM quanto à causa básica. Houve discordância entre DO original e DO nova em 16,1 por cento: 12,4 por cento com troca de capítulo e 3,7 por cento com mudança dentro do mesmo capítulo/CID-10. Das 103 DO originais com erro, 64,1 por cento foram identificadas pelo SIM. Entre as corretamente preenchidas, 195 foram selecionadas pelo SIM como tendo problemas. Das 261 selecionadas e investigadas pelo SIM, houve concordância na modificação da causa básica entre SIM e pesquisa em 76,8 por cento dos casos e perda de oportunidade de qualificação em 23,2 por cento. Entre as 198 DO não modificadas, 5,1 por cento deveriam ter sido e 94,9 por cento foram mantidas corretamente. A sensibilidade do SIM na identificação de problemas com a causa básica foi de 64,1 por cento e a especificidade de 75,5 por cento.

This cross-sectional study aimed to investigate the quality of data on underlying cause of death as completed on the death certificate by the attending physician, as well as the accuracy of the Mortality Information System (MIS) team in Porto Alegre, Rio Grande do Sul State, Brazil, in specification of the cause. 950 hospital deaths were investigated, using systematic sampling. A new death certificate (DC) was completed with data collected from hospital files, and was compared to the original DC and the MIS DC for underlying cause of death. Disagreement between the original DC and new DC occurred in 16.1 percent of cases. Of the 103 original DCs containing errors, the MIS identified 64.1 percent. Among those correctly completed, 195 were identified by the MIS as containing problems. Among the 261 selected and investigated by the MIS, there was agreement in modification of the underlying cause of death between the MIS and the search in 76.8 percent of cases, and a loss of opportunity for qualification in 23.2 percent. Among the 198 non-modified DCs, 5.1 percent should have been modified, and 94.9 percent were correctly maintained. The sensitivity of the MIS in the identification of problems with underlying cause of death was 64.1 percent, and specificity was 75.5 percent.

Premature mortality due to cardiovascular disease and social inequalities in Porto Alegre: from evidence to action.

BACKGROUND: Two perspectives, the economic (disease causing impoverishment) and social (poverty causing illness), have internationally disputed the justification for public health policies. OBJECTIVE: To investigate the relationship between early mortality by cardiovascular disease (CVD) and socioeconomic (SE) conditions in the city of Porto Alegre (PA), and discuss bases and strategies for the prevention of CVD. METHODS: An ecological analysis of the association between mortality by CVD at 45-64 years of age and SE conditions of 73 districts/neighborhoods in PA. The relative risk (RR) and the fraction of risk (FRA) attributable to inequality among the districts grouped into 4 SE strata were estimated. RESULTS: Early mortality by CVD was 2.6 times higher in the districts classified in the worst compared to the best of the 4 SE strata. Among the extreme districts, the RR reached 3.3 for CVD and 3.9 for cerebrovascular disease. Compared to the mortality in the best stratum, 62% of the early deaths in the worst stratum and 45% of those in the city as a whole could be attributed to socioeconomic inequality. CONCLUSION: Almost half of the mortality by CVD before 65 years of age can be attributed to poverty. Disease, on the other hand, contributes towards poverty and reduces competitiveness of the country. It is necessary to reduce illness and recover the health of the poorest inhabitants with investments that result in national economic development and improvement of the social conditions of the population.

Mortalidade precoce por doenças cardiovasculares e desigualdades sociais em Porto Alegre: da evidência à ação / Premature mortality due to cardiovascular disease and social inequalities in Porto Alegre: from evidence to action

FUNDAMENTO: Duas perspectivas, a econômica (doença causando empobrecimento) e a social (pobreza causando adoecimento), têm disputado internacionalmente a justificação de políticas públicas de saúde. OBJETIVO: Investigar a relação entre mortalidade precoce por doenças cardiovasculares (DCV) e condições socioeconômicas (SE) em Porto Alegre (PA), e discutir fundamentos e estratégias para a prevenção das DCV. MÉTODOS: Análise ecológica da associação entre mortalidade por DCV aos 45-64 anos e condições SE de 73 bairros de PA. Estimou-se o risco relativo (RR) e a fração do risco atribuível (FRA) às desigualdades entre bairros agrupados em 4 estratos SE. RESULTADOS: A mortalidade precoce por DCV foi 2,6 vezes maior nos bairros classificados no pior comparado ao melhor de 4 estratos SE. Entre bairros extremos, o RR chegou a 3,3 para as DCV e 3,9 para as doenças cerebrovasculares. Comparada à mortalidade no melhor estrato, 62 por cento dos óbitos precoces do pior estrato e 45 por cento dos da cidade como um todo seriam atribuíveis à desigualdade socioeconômica. CONCLUSÃO: Quase a metade da mortalidade por DCV antes do 65 anos pode ser atribuída à pobreza. A doença, por sua vez, contribui para a pobreza e reduz a competitividade do país. É preciso reduzir o adoecimento e recuperar a saúde dos mais pobres com investimentos que resultem em desenvolvimento econômico-nacional e melhoria das condições sociais da população.

BACKGROUND: Two perspectives, the economic (disease causing impoverishment) and social (poverty causing illness), have internationally disputed the justification for public health policies. OBJECTIVE: To investigate the relationship between early mortality by cardiovascular disease (CVD) and socioeconomic (SE) conditions in the city of Porto Alegre (PA), and discuss bases and strategies for the prevention of CVD. METHODS: An ecological analysis of the association between mortality by CVD at 45-64 years of age and SE conditions of 73 districts/neighborhoods in PA. The relative risk (RR) and the fraction of risk (FRA) attributable to inequality among the districts grouped into 4 SE strata were estimated. RESULTS: Early mortality by CVD was 2.6 times higher in the districts classified in the worst compared to the best of the 4 SE strata. Among the extreme districts, the RR reached 3.3 for CVD and 3.9 for cerebrovascular disease. Compared to the mortality in the best stratum, 62 percent of the early deaths in the worst stratum and 45 percent of those in the city as a whole could be attributed to socioeconomic inequality. CONCLUSION: Almost half of the mortality by CVD before 65 years of age can be attributed to poverty. Disease, on the other hand, contributes towards poverty and reduces competitiveness of the country. It is necessary to reduce illness and recover the health of the poorest inhabitants with investments that result in national economic development and improvement of the social conditions of the population.

Risk factors for recurrence of tuberculosis.

OBJECTIVE: To identify risk factors for recurrence of tuberculosis. METHODS: We studied a cohort of 610 patients with active pulmonary tuberculosis who were enrolled for treatment between 1989 and 1994 and cured using a three-drug treatment regimen of rifampin, isoniazid and pyrazinamide (RHZ). The risk factors studied were age, gender, race, duration of symptoms, lesion cavitation, extent of disease, diabetes mellitus, alcoholism, HIV infection, delayed negative sputum conversion, treatment compliance, and medication doses. In order to detect recurrence, the patients were monitored through the Rio Grande do Sul State Healt Department Information System for 7.7 +/- 2.0 years after cure. Data were analyzed using the Student's t-test, the chi-square test or Fisher's exact test, and Cox regression models. RESULTS: There were 26 cases of recurrence (4.3%), which corresponds to 0.55/100 patients-year. The recurrence rate was 5.95 and 0.48/100 patients-year in HIV-positive and HIV-negative patients, respectively (p < 0.0001). In the multivariate analysis, HIV infection [RR = 8.04 (95% CI: 2.35-27.50); p = 0.001] and noncompliance [RR = 6.43 (95% CI: 2.02-20.44); p = 0.002] proved to be independently associated with recurrence of tuberculosis. CONCLUSIONS: Recurrence of tuberculosis was more common in HIV-positive patients and in patients who did not comply with the self-administered treatment (RHZ regimen). Patients presenting at least one of these risk factors can benefit from the implementation of a post-treatment surveillance system for early detection of recurrence. An alternative to prevent noncompliance with tuberculosis treatment would be the use of supervised treatment.

Differences in the clinical and radiological presentation of intrathoracic tuberculosis in the presence or absence of HIV infection.

OBJECTIVE: To describe the differences in the clinical and radiological presentation of tuberculosis in the presence or absence of HIV infection. METHODS: A sample of 231 consecutive adults with active pulmonary tuberculosis admitted to a tuberculosis hospital were studied, assessing HIV infection, AIDS, and associated factors, as well as re-evaluating chest X-rays. RESULTS: There were 113 HIV-positive patients (49%) Comparing the 113 HIV-positive patients (49%) to the 118 HIV-negative patients (51%), the former presented a higher frequency of atypical pulmonary tuberculosis (pulmonary lesions accompanied by intrathoracic lymph node enlargement), hematogenous tuberculosis, and pulmonary tuberculosis accompanied by superficial lymph node enlargement, as well as presenting less pulmonary cavitation. The same was found when HIV-positive patients with AIDS were compared to those without AIDS. There were no differences between the HIV-positive patients without AIDS and the HIV-negative patients. Median CD4 counts were lower in HIV-positive patients with intrathoracic lymph node enlargement and pulmonary lesions than in the HIV-positive patients with pulmonary lesions only (47 vs. 266 cells/mm3; p < 0.0001), in HIV-positive patients with AIDS than in those without AIDS (136 vs. 398 cells/mm3; p < 0.0001) and in patients with atypical pulmonary tuberculosis than in those with other forms of tuberculosis (31 vs. 258 cells/mm3; p < 0.01). CONCLUSION: Atypical forms and disseminated disease predominate among patients with advanced immunosuppression. In regions where TB prevalence is high, the presence of atypical pulmonary tuberculosis or pulmonary tuberculosis accompanied by superficial lymph node enlargement should be considered an AIDS-defining condition.

Fatores de risco para a recidiva da tuberculose / Risk factors for recurrence of tuberculosis

OBJETIVO: Identificar fatores de risco para a recidiva da tuberculose. MÉTODOS: Estudou-se uma coorte de 610 pacientes com tuberculose pulmonar bacilífera inscritos para tratamento entre 1989 e 1994 e curados com o esquema contendo rifampicina, isoniazida e pirazinamida (RHZ). Avaliaram-se os seguintes fatores de risco: idade, sexo, cor, duração dos sintomas, cavitação das lesões, extensão da doença, diabetes melito, alcoolismo, infecção pelo HIV, negativação tardia do escarro, adesão ao tratamento e doses dos fármacos. Para detecção das recidivas, os pacientes foram seguidos por 7,7 ± 2,0 anos, após a cura, pelo sistema de informação da Secretaria Estadual da Saúde do Rio Grande do Sul. Nas análises utilizaram-se os testes t de Student, qui-quadrado ou exato de Fisher e a regressão de Cox. RESULTADOS: Ocorreram 26 recidivas (4,3 por cento), correspondendo a 0,55/100 pessoas-ano. A taxa de recidiva foi de 5,95 e 0,48/100 pessoas-ano, respectivamente, nos pacientes HIV-positivos e nos HIV-negativos (p < 0,0001). Na análise multivariada, a infecção pelo HIV [RR = 8,04 (IC95 por cento: 2,35-27,50); p = 0,001] e o uso irregular da medicação [RR = 6,43 (IC95 por cento: 2,02-20,44); p = 0,002] mostraram-se independentemente associados às recidivas. CONCLUSÕES: A recidiva da tuberculose foi mais freqüente nos pacientes HIV-positivos e naqueles que não aderiram ao tratamento auto-administrado (esquema-RHZ). Pacientes com pelo menos um destes fatores de risco poderão se beneficiar com a implantação de um sistema de vigilância pós-tratamento para detecção precoce de recidivas. Para prevenir a não-adesão ao tratamento da tuberculose, a alternativa seria a utilização de tratamento supervisionado.

OBJECTIVE: To identify risk factors for recurrence of tuberculosis. METHODS: We studied a cohort of 610 patients with active pulmonary tuberculosis who were enrolled for treatment between 1989 and 1994 and cured using a three-drug treatment regimen of rifampin, isoniazid and pyrazinamide (RHZ). The risk factors studied were age, gender, race, duration of symptoms, lesion cavitation, extent of disease, diabetes mellitus, alcoholism, HIV infection, delayed negative sputum conversion, treatment compliance, and medication doses. In order to detect recurrence, the patients were monitored through the Rio Grande do Sul State Healt Department Information System for 7.7 ± 2.0 years after cure. Data were analyzed using the Student's t-test, the chi-square test or Fisher's exact test, and Cox regression models. RESULTS: There were 26 cases of recurrence (4.3 percent), which corresponds to 0.55/100 patients-year. The recurrence rate was 5.95 and 0.48/100 patients-year in HIV-positive and HIV-negative patients, respectively (p < 0.0001). In the multivariate analysis, HIV infection [RR = 8.04 (95 percent CI: 2.35-27.50); p = 0.001] and noncompliance [RR = 6.43 (95 percent CI: 2.02-20.44); p = 0.002] proved to be independently associated with recurrence of tuberculosis. CONCLUSIONS: Recurrence of tuberculosis was more common in HIV-positive patients and in patients who did not comply with the self-administered treatment (RHZ regimen). Patients presenting at least one of these risk factors can benefit from the implementation of a post-treatment surveillance system for early detection of recurrence. An alternative to prevent noncompliance with tuberculosis treatment would be the use of supervised treatment.

Diferenças na apresentação clínico-radiológica da tuberculose intratorácica segundo a presença ou não de infecção por HIV / Differences in the clinical and radiological presentation of intrathoracic tuberculosis in the presence or absence of HIV infection

OBJETIVO: Descrever as diferenças na apresentação clínico-radiológica da tuberculose segundo a presença ou não de infecção por HIV. MÉTODOS: Examinou-se uma amostra consecutiva de 231 adultos com tuberculose pulmonar bacilífera internados em hospital de tisiologia. A presença de infecção por HIV, AIDS e fatores associados foi avaliada e as radiografias de tórax foram reinterpretadas. RESULTADOS: Havia 113 pacientes HIV-positivos (49 por cento). Estes pacientes apresentavam maior freqüência de tuberculose pulmonar atípica (lesões pulmonares associadas a linfonodomegalias intratorácicas), tuberculose de disseminação hemática e tuberculose pulmonar associada a linfonodomegalias superficiais e menor freqüência de lesões pulmonares escavadas do que os pacientes HIV-negativos. Isto também ocorreu entre os pacientes HIV-positivos com AIDS e os HIV-positivos sem AIDS. Não se observaram diferenças entre os pacientes HIV-positivos sem AIDS e os HIV-negativos. Os valores medianos de CD4 foram menores nos pacientes HIV-positivos com linfonodomegalias intratorácicas e lesões pulmonares em comparação aos com lesões pulmonares exclusivas (47 vs. 266 células/mm³; p < 0,0001), nos pacientes HIV-positivos com AIDS em comparação aos HIV-positivos sem AIDS (136 vs. 398 células/mm³; p < 0,0001) e nos pacientes com tuberculose pulmonar atípica em comparação aos com outros tipos de tuberculose (31 vs. 258 células/mm³; p < 0,01). CONCLUSÃO: Há um predomínio de formas atípicas e doença disseminada entre pacientes com imunossupressão avançada. Em locais com alta prevalência de tuberculose, a presença de tuberculose pulmonar atípica ou de tuberculose pulmonar associada a linfonodomegalias superficiais é definidora de AIDS.

OBJECTIVE: To describe the differences in the clinical and radiological presentation of tuberculosis in the presence or absence of HIV infection. METHODS: A sample of 231 consecutive adults with active pulmonary tuberculosis admitted to a tuberculosis hospital were studied, assessing HIV infection, AIDS, and associated factors, as well as re-evaluating chest X-rays. RESULTS: There were 113 HIV-positive patients (49 percent) Comparing the 113 HIV-positive patients (49 percent) to the 118 HIV-negative patients (51 percent), the former presented a higher frequency of atypical pulmonary tuberculosis (pulmonary lesions accompanied by intrathoracic lymph node enlargement), hematogenous tuberculosis, and pulmonary tuberculosis accompanied by superficial lymph node enlargement, as well as presenting less pulmonary cavitation. The same was found when HIV-positive patients with AIDS were compared to those without AIDS. There were no differences between the HIV-positive patients without AIDS and the HIV-negative patients. Median CD4 counts were lower in HIV-positive patients with intrathoracic lymph node enlargement and pulmonary lesions than in the HIV-positive patients with pulmonary lesions only (47 vs. 266 cells/mm³; p < 0.0001), in HIV-positive patients with AIDS than in those without AIDS (136 vs. 398 cells/mm³; p < 0.0001) and in patients with atypical pulmonary tuberculosis than in those with other forms of tuberculosis (31 vs. 258 cells/mm³; p < 0.01). CONCLUSION: Atypical forms and disseminated disease predominate among patients with advanced immunosuppression. In regions where TB prevalence is high, the presence of atypical pulmonary tuberculosis or pulmonary tuberculosis accompanied by superficial lymph node enlargement should be considered an AIDS-defining condition.

Resultado do tratamento da tuberculose com estreptomicina, isoniazida e etambutol (esquema SHM) / Results of tuberculosis treatment with streptomycin, isoniazid, and ethambutol (scheme SHM)

Objetivo: Avaliar o desempenho do esquema SHM (estreptomicina, isoniazida e etambutol), na rotina de trabalho de uma unidade ambulatorial de tratamento da tuberculose. Método: Setenta e oito pacientes tuberculosos, cujo tratamento prévio com o esquema RHZ (seis meses de rifampicina, isoniazida e pirazinamida) teve de ser interrompido devido a efeitos adversos, ou que não puderam receber o esquema RHZ por serem de alto risco para hepatotoxicidade a esse esquema, foram tratados ambulatorialmente com o esquema de 12 meses de SHM, de 1986 a 1994, em Porto Alegre, Rio Grande do Sul, Brasil. Resultados: Em três pacientes houve necessidade de troca de esquema por toxicidade (3,8 por cento). Nos 75 restantes observaram-se 58 curas (77,3 por cento), oito abandonos (10,7 por cento), cinco falências (6,7 por cento) e quatro óbitos (5,3 por cento). A taxa teórica de cura, que é o percentual de cura entre os bacilíferos que fizeram tratamento regular, foi de 95,3 por cento. Reações adversas ocorreram em 32 pacientes (41 por cento), sendo as mais freqüentes as manifestações de dano vestibular, em 18 (23,1 por cento). Esses resultados foram comparados com os obtidos no mesmo ambulatório com o esquema de 12 meses de RHM (rifampicina, isoniazida e etambutol) e de seis meses de RHZ. Conclusão: O esquema SHM pode ser recomendado como alternativa para o tratamento da tuberculose quando o esquema RHZ não pode ser indicado

Mortalidade por doença isquêmica do coração no Estado do Rio Grande do Sul: aspectos geográficos e sócio-econômicos / Ischemic heart disease in Rio Grande do Sul, Brazil: socioeconomic and geographical aspects

Há importantes diferenças regionais na mortalidade por doença isquêmica do coração que estão relacionadas com processos históricos de ocupação do solo e com transformações na organização social derivadas da evolução dos meios de produção. A agricultura em larga escala e a industrialização levam às migrações, `a urbanização, ao aumento das desigualdades sociais. Estas transformações influem na distribuição dos fatores de risco para DIC, tanto dos fatores conhecidos quando de outros ainda não identificados. O perfil de distribuição desses fatores é especialmente desfavorável em populações migrantes de baixa renda. Assim como a mortalidade infantil está intimamente associada com a pobreza rural, a mortalidade por DIC está com a pobreza e as tensões da vida urbana. É através da pobreza que surge a associação entre ambas mortalidades...