Effects of preoperative magnetic resonance image on survival rates and surgical planning in breast cancer conservative surgery: randomized controlled trial (BREAST-MRI trial).

BACKGROUND: Breast magnetic resonance imaging (MRI) has high sensitivity in detecting invasive neoplasms. Controversy remains about its impact on the preoperative staging of breast cancer surgery. This study evaluated survival and surgical outcomes of preoperative MRI in conservative breast cancer surgery. METHODS: A phase III, randomized, open-label, single-center trial including female breast cancer participants, stage 0-III disease, and eligible for breast-conserving surgery. We compared the role of including MRI in preoperative evaluation versus radiologic exam routine with mammography and ultrasound in breast cancer conservative candidates. The primary outcome was local relapse-free survival (LRFS), and secondary outcomes were overall survival (OS), mastectomy rate, and reoperation rate. RESULTS: 524 were randomized to preoperative MRI group (n = 257) or control group (n = 267). The survival analysis showed a 5.9-years LRFS of 99.2% in MRI group versus 98.9% in control group (HR = 0.72; 95% CI 0.12-4.28; p = 0.7) and an OS of 95.3% in the MRI group versus 96.3% in the control group (HR = 1.37 95% CI 0.59-3.19; p = 0.8). Surgical management changed in 21 ipsilateral breasts in the MRI group; 21 (8.3%) had mastectomies versus one in the control group. No difference was found in reoperation rates, 22 (8.7%) in the MRI group versus 23 (8.7%) in the control group (RR = 1.002; 95% CI 0.57-1.75; p = 0.85). CONCLUSION: Preoperative MRI increased the mastectomy rates by 8%. The use of preoperative MRI did not influence local relapse-free survival, overall survival, or reoperation rates.

HIV testing inside Brazilian female prisons: results of a national survey.

This study aimed to identify the prevalence of women in prisons who have already had an HIV test inside prison and the factors associated with this test. A cross-sectional study was carried out with 1327 women in 15 prisons in 9 states in Brazil. Almost 60% (95% CI: 57.8-63.7) of women have already been tested for HIV in prison. The factors associated with this HIV test were age ≥41 years (OR = 1.9; 95% CI = 1.2-2.9), highest level of education (OR = 1.9; 95% CI = 1.3-2.8), having been arrested 3 or more times (OR = 1.9; 95% CI = 1.3-2.8), having received information about HIV/STI in the lifetime (OR = 1.4; 95% CI = 1.1-1.9) and perceived themselves to be at no risk for HIV infection (OR = 1.7; 95% CI = 1.2-2.5), black or mixed race (OR = 0.7; 95% CI = 0.5-0.9) and having a male sexual partner (OR = 0.6; 95% CI = 0.5-0.9). The routine HIV testing in prisons needs to be expanded to promote HIV prevention for a population with limited access to these services outside of prison.

Lipid parameters in obese and normal weight patients with or without chronic periodontitis.

OBJECTIVE: The aim of this study was to evaluate the serum levels of lipids in patients with normal weight (NW) or obesity with or without chronic periodontitis (ChP). MATERIALS AND METHODS: One hundred and sixty non-smoking patients without history of diabetes and/or cardiovascular events were allocated into one of the following groups: NW patients with periodontal health (NWH; n = 40), NW patients with ChP (NWChP; n = 40), obese patients with periodontal health (ObH; n = 40), and obese patients with ChP (ObChP; n = 40). Serum levels of total cholesterol (TC), low-density lipoprotein (LDL), high-density lipoprotein (HDL), and triglycerides (TRG) were estimated. RESULTS: After adjustments for gender and age, both NW groups presented lower levels of TRG than both obese groups (p < 0.05). The NWH group presented lower levels of LDL than both periodontitis groups (p < 0.05) and the lowest TC/HDL ratio when compared to the other groups (p < 0.05). Females from the NWH group exhibited higher levels of HDL and lower LDL/HDL ratio than females from the ObChP group (p < 0.05). Furthermore, individuals from the ObChP group were more likely to have levels of LDL ≥130 mg/dl and HDL ≤40 mg/dl, compared to those from the NWH group (p < 0.05). CONCLUSIONS: ChP and obesity, jointly or individually, are associated with undesirable pro-atherogenic lipid profiles. CLINICAL RELEVANCE: There is interest in identifying clinical conditions associated with dyslipidemia to improve preventive and treatment strategies. This study demonstrated that ChP, obesity, and the association of both conditions might be related to pro-atherogenic lipid profiles.

Widespread nasal carriage of Mycobacterium lepraeamong a healthy population in a hyperendemic region of northeastern Brazil.

A case-control study was conducted to determine the presence ofMycobacterium lepraeDNA in nasal secretions of leprosy cases and nonleprosy individuals in Fortaleza, Brazil. It included 185 cases identified by physicians at the Dona Libânia National Reference Centre for Sanitary Dermatology (CDERM). A control group (Co) (n = 136) was identified among individuals from CDERM not diagnosed as leprosy cases. To augment the spatial analysis of M. leprae specific repetitive element (RLEP) positive prevalence, an external group (EG) (n = 121), a convenience sample of healthy students, were included. Polymerase chain reaction for the RLEP sequence was conducted for all participants. Prevalence of RLEP positivity for cases and Co were 69.2% and 66.9%, respectively, significantly higher than for EG (28.1%), and reported elsewhere. Male sex, belonging to a lower socioeconomic status (D/E), history of a previous contact with a case and being older, were associated with being a leprosy case. Our geographical analysis demonstrated that the bacillus is widespread among the healthy population, with clusters of RLEP positive multibacillary cases concentrated in distinct areas of the city. Our results suggest that in endemic areas, as in Fortaleza, surveillance for both nonhousehold leprosy contacts and members of the general population living in cluster areas should be implemented.

Ductus venosus versus cerebral transverse sinus Doppler velocimetry for predicting acidemia at birth in pregnancies complicated by placental insufficiency.

OBJECTIVES: The objectives of this study is to compare ductus venosus (DV) and cerebral transverse sinus (CTS) Doppler velocimetry for predicting acidemia at birth in pregnancies complicated by placental insufficiency. METHODS: A prospective cross-sectional study involving 69 cases. Doppler assessment of the DV and CTS was carried out in the last 24 hours prior to delivery. The sensitivity, specificity, positive and negative predictive values, and the accuracy and false-positive and false-negative rates were calculated for those parameters considered to be good predictors of acidemia. The McNemar test was used to compare the various parameters. RESULTS: The DV pulsatility index(PI), S/A, and (S - A)/S ratios as well as the CTS PI and the (S - A)/S ratio were good predictors of acidemia. The comparison between DV and CTS showed that for pulsatility index for veins, the sensitivity was 52.4% versus 66.7%, p = 0.508; the specificity was 81.2% versus 77.1%, p = 0.774; and the accuracy was 72.5% versus 73.9%, p = 1.00. For the (S - A)/S ratio the sensitivity was 52.4% versus 52.4%, p = 1.00; the specificity was 85.4% versus 79.2%, p = 0.508; and the accuracy was 75.4% versus 71%, p = 0.647. CONCLUSIONS: In pregnancies with placental insufficiency, the PI and the (S - A)/S ratio of both DV and CTS were equally effective in predicting acidemia at birth.

Differences in non-communicable diseases between women in prison and the general population in Brazil.

Women in prison have high risk for non-communicable diseases both in relation to men in prison and in relation to women in the general population. This study documented the health disparities related to diseases among women in prison and in the general female population in Brazil. Women in prisons (WP) < 30 years old had a prevalence of hypertension (PR = 4.5; 95% CI 3.4-6.1), cardiovascular disease (PR = 4.4; 95% CI 2.4-7.9) and asthma (PR = 3.0; 95% CI 2.3-3.8) higher than general female population in Brazil in the same age group. Women in prison > 50 years old also presented asthma prevalence (PR = 4.3; 95% CI 2.9-6.3) higher than the general female population in Brazil in the same age group. These women in prison, overwhelmingly young, could be mistaken for an elderly population in Brazil. Actively responding to early disease in these women can reduce overall health costs and improve health care for this population that may have limited access to health care outside of prison.

[Hypertension in female prisoners in Brazil: far beyond the biological aspects]. / Hipertensão em mulheres presas no Brasil: muito além do biológico.

The scope was to estimate the prevalence of arterial hypertension (AHT) and associated risk factors among female prisoners. Data from the National Health Survey of the Female Prison Population and Prison Guards were used, investigating sociodemographic variables, prison characteristics, health behaviors and conditions. Information was collected through a self-administered questionnaire, and the magnitude of the association was estimated by the odds ratio and 95% confidence interval. Of the 1,327 prisoner participants, 24.4% were hypertensive, the majority were 31 years of age or older (54.6%), and 51.5% self-reported mixed race. After adjustment for associated risk factors in the bivariate analysis, a direct relationship between age and AHT was observed, in which age equal to/over 41 years was independently associated with a 7-fold greater chance of having AHT, compared to those under 25 years of age. Those who self-reported mixed race, had high cholesterol, were obese and were also independently associated with a higher prevalence of AHT. The greater the number of people with whom the inmate shares a cell was associated with a higher prevalence of AHT, but without a dose-response relationship. The conclusion drawn is that age, race, obesity, physical inactivity and stress are risk factors for AHT in female prisoners.

Objetivou-se estimar a prevalência de hipertensão arterial (HA) e os fatores de risco associados em mulheres presas. Utilizou-se dados do Inquérito Nacional de Saúde na População Penitenciária Feminina e em Servidoras Prisionais, investigando-se características sociodemográficas, fatores das prisões, comportamentos e condições de saúde. As informações foram coletadas por meio de questionário autoaplicado, sendo a magnitude da associação estimada por odds ratio e intervalo de confiança de 95%. Das 1.327 participantes, 24,4% eram hipertensas, a maioria tinha 31 anos ou mais (54,6%), 51,5% autorreferiram etnia/cor parda. Após mutual ajustamento pelos fatores de risco associados na análise bivariada, observou-se relação direta e com gradiente entre idade e HA, em que idade igual/maior a 41 anos foi associada independentemente com uma chance sete vezes maior de ter HA, se comparado a quem tem menos de 25 anos. Aquelas que autorreferiram etnia/cor negra apresentaram colesterol alto e estavam obesas, também foram associadas de forma independente com maior prevalência de HA. O maior número de pessoas com que a presa divide cela esteve associado à maior prevalência de há, sem uma relação dose-resposta. Conclui-se que idade, etnia/cor, obesidade, inatividade física e estresse são fatores de risco para HA em mulheres presas.

Pathological macroscopic evaluation of breast density versus mammographic breast density in breast cancer conserving surgery.

Correlation between imaging and anatomopathological breast density has been superficially explored and is heterogeneous in current medical literature. It is possible that mammographic and pathological findings are divergent. The aim of this study is to evaluate the association between breast density classified by mammography and breast density of pathological macroscopic examination in specimens of breast cancer conservative surgeries. Post-hoc, exploratory analysis of a prospective randomized clinical trial of patients with breast cancer candidates for breast conservative surgery. Breast mammographic density (MD) was analyzed according to ACR BI-RADS® criteria, and pathologic macroscopic evaluation of breast density (PMBD) was estimated by visually calculating the ratio between stromal and fatty tissue. From 412 patients, MD was A in 291 (70,6%), B in 80 (19,4%) B, C in 35 (8,5%), and D in 6 (1,5%). Ninety-nine percent (201/203) of patients classified as A+B in MD were correspondently classified in PMBD. Conversely, only 18.7% (39/209) of patients with MD C+D were classified correspondently in PMBD (p < 0.001). Binary logistic regression showed age (OR 1.06, 1.01-1.12 95% CI, p 0.013) and nulliparity (OR 0.39, 0.17-0.96 95% CI, p 0.039) as predictors of A+B PMBD. Conclusion: Mammographic and pathologic macroscopic breast density showed no association in our study for breast C or D in breast image. The fatty breast was associated with older patients and the nulliparity decreases the chance of fatty breasts nearby 60%.

Locally advanced breast cancer: breast-conserving surgery and other factors linked to overall survival after neoadjuvant treatment.

Background: Recent data suggest that breast-conserving surgery (BCS) may positively impact overall survival (OS) in early breast cancer. However, the role of BCS in locally advanced breast cancer (LABC) following neoadjuvant therapy (NAT) remains uncertain. Methods: We conducted a retrospective cohort study involving 530 LABC patients who underwent surgery after NAT between 2010 and 2015. Outcomes examined included OS, distant recurrence rates (DRR), and loco-regional recurrence rates (LRRs). Results: Among the 927 breast cancer patients who received NAT, 530 were eligible for our study. Of these, 24.6% underwent BCS, while 75.4% underwent mastectomy (MS). The median follow-up duration was 79 months. BCS patients exhibited a higher pathological complete response (PCR) rate compared to those who underwent MS (22.3% vs. 10%, p < 0.001). The 6-year OS rates for BCS and MS were 81.5% and 62%, respectively (p < 0.000). In multivariate OS analysis, MS was associated with worse outcomes (OR 1.678; 95% CI 1.069-2.635; p = 0.024), as was body mass index (BMI) (OR 1.031; 95% CI 1.006-1.058; p = 0.017), and stage IIIB or IIIC (OR 2.450; 95% CI 1.561-3.846; p < 0.000). Conversely, PCR (OR 0.42; 95% CI 0.220-0.801; p = 0.008) was associated with improved survival. DRR was significantly lower in BCS (15.4%) compared to MS (36.8%) (OR 0.298; 95% CI 0.177-0.504). LRRs were comparable between BCS (9.2%) and MS (9.5%) (OR 0.693; 95% CI 0.347-1.383). Conclusion: Our findings suggest that BCS is oncologically safe, even for patients with large lesions, and is associated with superior OS rates compared to MS. Additionally, lower BMI, lower pretreatment stage, and achieving PCR were associated with improved survival outcomes.

Leprosy among female prisoners in Brazil.

To estimate the prevalence of leprosy among Brazilian female prisoners and identify factors associated with the disease. Cross-sectional study conducted between 2014 and 2015 in 15 Brazilian female prisons. The data of 1,327 women were collected using Audio Computer-Assisted Self-Interviewing and dermatological and neurological examination to identify suspicious lesions of leprosy. The average age was 33.4 years. Suspicion of leprosy was identified in 5.1% of women in prison, and lifetime self-reported prevalence was 7.5%. The variables that were associated with lifetime self-reported leprosy were: women in prison once being twice as likely to have leprosy; white women were 1.4 time more likely to have leprosy than non-white women; women who knew someone with leprosy was 1.9 time more likely to have leprosy; and women who shared a cell with 11 or more women were 2.5 times more likely to have leprosy than women who shared a cell with two or fewer people. The leprosy prevalence among female prisoners in Brazil were greater than that found in a Brazilian woman of the general population and show the extremely high vulnerability of this population generated through pre-incarceration poverty, as well as potential transmission in prison.

Health of female prisoners in Brazil.

The majority of the women in prisons comes from the poorest strata of society with limited access to education, income and health services. This contributes to the fact that female prisoners have a higher burden of adverse health events than both male prisoners and women in general population We objectived to estimate the prevalence of different morbidities and risk factors among female prisoners in Brazil. A total of 1,327 women were recruited in this cross-sectional study. Data were collected using a using audio computer-assisted self-interviewing questionnaire, rapid antibody tests and physical examination. The higher prevalences was of syphilis, infection sexually disease, arterial hypertense, asthma, common mental disorders and severe physical violence. Regarding risk factors, 36.3% have good knowledge about HIV, 55.8% were smokers, 72.3% had ever used any illicit drug, 92.1% are sedentary and 92.1% maintained an unhealthy diet. Female prisoners are disproportionately affected by various adverse health conditions. There is a need for an effective surveillance system inside prisons for early diagnosis and treatment.

Hypertension among women experiencing incarceration: A comparison with the general female population.

To compare the prevalence and characteristics of hypertension in women experiencing incarceration (WEI) to the general population in Brazil: (1) a prison survey conducted from January 2014 to December 2015 in 15 states, with 1,327 WEI; and (2) a household survey in the 26 states and the Federal District of Brazil administered to women in the general population (WGP). Data analysis used SPSS® version 20.0. The point estimates and the prevalence ratio with their respective confidence intervals were calculated using Poisson regression. Ages in the two populations differed, 27.9% of WGP were over 50, while 7.3% of WEI were. The overall prevalence of arterial hypertension was 31.3% (95% CI: 28.6-34.0) in the WEI and 38.9% (95% CI: 37.8-39.9) for WGP. For individuals under 30, hypertension was found in 22.4% of WEI and 13.4% of WGP. WEI have a higher prevalence of hypertension at an earlier age than the GP. Less education, obesity, using illegal drugs, previous pregnancy, and not using contraceptives were more frequent in this group, revealing the need to implement policies aimed at treating both their hypertension and other health issues in prison.

Impact of a computer system as a triage tool in the management of pulmonary tuberculosis in a HIV reference center in Brazil.

BACKGROUND: The Neural Clinical Score for tuberculosis (NCS-TB) is a computer system developed to improve the triage of presumed pulmonary TB (pPTB). METHODS: A study was performed with cohorts of pPTB patients cared for at a reference hospital in Northeast Brazil. RESULTS: The NCS-TB sensitivity was 76.5% for TB diagnosis, which shortened the time from triage to smear microscopy results (3.3 to 2.5 days; p<0.001) and therapy initiation (6.7 to 4.1 days; p=0.045). CONCLUSIONS: Although the NCS-TB was not suitable as a screening tool, it was able to optimize laboratory diagnosis and shorten the time to treatment initiation.

A social network approach for the study of leprosy transmission beyond the household.

BACKGROUND: Mycobacterium leprae was the first microorganism directly associated with a disease, however, there are still important gaps in our understanding of transmission. Although household contacts are prioritized, there is evidence of the importance of extrahousehold contacts. The goal of this article is to contribute to our understanding of the transmission of leprosy ex-household. METHODS: We compare co-location data of 397 leprosy cases and 211 controls drawn from the Centro de Dermatologia Sanitária D. Libânia in Fortaleza, Brazil. We collected lifetime geolocation data related to residence, school attendance and workplace and developed novel methods to establish a critical distance (Rc) for exposure and evaluated the potential for transmission for residence, school and workplace. RESULTS: Our methods provide different threshold values of distance for residence, school and workplace. Residence networks demonstrate an Rc of about 500 m. Cases cluster in workplaces as well. Schools do not cluster cases. CONCLUSIONS: Our novel network approach offers a promising opportunity to explore leprosy transmission. Our networks confirm the importance of coresidence, provide a boundary and suggest a role for transmission in workplaces. Schools, on the other hand, do not demonstrate a clustering of cases. Our findings may have programmatic relevance.

Syphilis Testing Among Female Prisoners in Brazil: Results of a National Cross-sectional Survey.

ABSTRACT: Brazil has the third largest prison population in the world and is also experiencing a high and rising rate of syphilis infection. To establish the gaps in syphilis testing, we examined data from a nationally representative sample of incarcerated women in Brazil. Data originated from a cross-sectional survey designed to represent all regions of Brazil (N = 1,327). Data were collected by Audio Computer-Assisted Self-Interview, including variables in several blocks or domains. 49.2% had a lifetime history of being tested for syphilis. Increased likelihood of syphilis testing was significantly associated with completed elementary education (odds ratio ajustado [AOR] 1.75, 95% confidence interval [CI] 1.28-2.40), completed high school or more (AOR 2.04, 95% CI 1.36-3.06), income below minimum wage (AOR 1.46, 95% CI 1.10-1.94), homelessness (AOR 1.83, 95% CI 1.21-2.76), having heard of the female condom (AOR 1.92, 95% CI 1.25-2.95), received a condom in prison (AOR 1.56, 95% CI 1.11-2.21) or in public health services (AOR 1.50, 95% CI 1.13-1.98), lifetime history of pregnancy (AOR 2.55, 95% CI 1.67-3.89), had a gynecological examination (AOR 1.73, 95% CI 1.05-2.83), and perceived they had some chance (AOR 1.61, 95% CI 1.17-2.20) or a big chance (AOR 1.89, 95% CI 1.31-2.73) that they were likely to have been infected with HIV before entering prison.

Prevalence of hypertension and associated factors in female prison correctional officers in a national sample in Brazil.

OBJECTIVES: To estimate hypertension prevalence and associated factors among female correctional officers (FCO) in female Brazilian prisons. METHODS: Cross-sectional, analytical study conducted in 15 female prisons in all five Brazilian regions between January 2014 and December 2015. The study population consisted of correctional officers with at least 6 months in the position. The sampling included 40% of FCO present in the prison during data collection, yielding 295 FCOs. Data were collected via Audio Computer-Assisted Self-Interview. A physical examination of participants was conducted including blood pressure, weight, and waist and hip circumference. The Odds Ratio and confidence intervals for independent factors were estimated. RESULTS: Hypertension prevalence in correctional officers was 37.9%, (95% CI 32.1-44.0). Hypertension was associated with obesity (95% CI = 1.884-9.947), cardiovascular disease (95% CI = 3.348-16.724), and participation in the specific training course for the relevant position (95% CI = 1.413-9.564). CONCLUSIONS: While findings, except for the last factor, are not novel, this is the first such study conducted in Brazil. Hypertension prevalence among this pool of all female correctional officers is higher than in the average population, and FCOs associate this with the prison environment. Current training does not appear to address this problem. Especially since prison populations are growing in Brazil, this problem needs to be addressed for the health of the FCOs and the prisoners in their care.

Impaired sleep reduces quality of life in chronic obstructive pulmonary disease.

Disturbed sleep is reportedly common in chronic obstructive pulmonary disease (COPD), but the impact of quality of sleep on health-related quality of life (HRQL) has not been previously investigated in these individuals. The purpose of this study was to assess the impact of quality of sleep on HRQL in patients with COPD. In 30 clinically stable patients with moderate to very severe COPD, we evaluated subjective sleep quality using the Pittsburgh Sleep Quality Index (PSQI) and HRQL using the Saint George's Respiratory Questionnaire. Additionally, lung function was assessed by spirometry, severity of dyspnea by the Modified Medical Research Council scale, and functional exercise capacity by the Six-Minute Walk Test. Twenty-one (70%) patients showed poor quality of sleep (PSQI > 5). HRQL was significantly correlated with quality of sleep (P = 0.02), post-bronchodilator FEV1 (P = 0.04), and severity of dyspnea (P < 0.01). Multiple regression analysis showed that quality of sleep was the best predictor of quality of life in our subjects. Our data suggest that quality of sleep is major determinant of HRQL in COPD. Increased efforts to diagnose and treat sleep problems, including measures to improve factors that adversely affect sleep should receive great attention in the daily management of these patients.

Risk factors for death among patients with Chikungunya virus infection during the outbreak in northeast Brazil, 2016-2017.

BACKGROUND: Chikungunya virus (CHIKV) infection is a current public health problem. The aim of this study was to investigate risk factors for death among patients with CHIKV infection during a large epidemic in northeast Brazil. METHODS: This is a cross-sectional study with all registered cases of CHIKV in Ceara, Brazil, during 2016-2017. Data from notification reports were collected, and we have compared non-survivors and survivors. RESULTS: A total of 182 731 cases were reported, with a mean age of 38±19 years, and the majority was female (62%). There were 383 deaths. Non-survivors were elderly, with a predominance of males, and with a lower educational level. Conditions that were significantly more frequent in the non-survivor group were systemic arterial hypertension, diabetes mellitus and chronic kidney disease (p<0.0001). Independent risk factors for death were advanced age (OR 7.35, p<0.0001), male gender (OR 2.05, p<0.0001), leukopenia (OR 3.18, p<0.0001) and vomiting (OR 2.19, p<0.0001), and comorbidities like hypertension (OR 3.74, p<0.0001), diabetes (OR 3.29, p<0.0001) and chronic kidney disease (OR 3.14, p<0.0001). CONCLUSION: Advanced age and low educational level were associated with higher risk of mortality in CHIKV. Leukopenia and vomiting were signs of severity, as well as the presence of comorbidities, especially hypertension, diabetes and kidney disease.

Clinical profile and factors associated with hospitalization during a Chikungunya epidemic in Ceará, Brazil.

INTRODUCTION: The aim of this study was to characterize the clinical-epidemiological profile of Chikungunya virus infection and the factors associated with hospitalization during the peak of the most recent epidemic period in Brazil (2016-2017). METHODS: Two official databases of the State Health Secretariat of Ceará were used, and a total of 182,731 notifications were analyzed. RESULTS: Independent factors associated with hospital admission were chronic kidney disease (OR 4.56, 95% CI 3.36-6.17), hypertension (OR 1.90, 95% CI 1.69-2.14), leukopenia (OR 1.89, 95% CI 1.56-2.30) and diabetes mellitus (OR 1.70, 95% CI 1.44-1.99). CONCLUSIONS: The pre-existing comorbidities have shown the potential to destabilize the patients' clinical status.

Discrimination based on sexual orientation against MSM in Brazil: a latent class analysis.

INTRODUCTION: Discrimination based on sexual orientation can influence vulnerability to HIV, increasing exposure to risky sexual behavior among men who have sex with men (MSM). OBJECTIVES: To analyze data using latent class analysis (LCA) to identify groups of individuals with specific patterns of discrimination based on sexual orientation (DSO). METHODS: Cross-sectional study using respondent-driven sampling in 12 Brazilian cities in 2016. LCA was used to characterize discrimination among MSM based on 13 variables in the survey questionnaire. The proportions of men reporting DSO and other variables of interest were estimated using Gile's Successive Sampling estimator. RESULTS: Most MSM were young, single, had a religion, had a high school or college degree, black or brown skin color, and socioeconomic status classified as average. More than half of the participants reported that they had been discriminated against during the last 12 months due to their sexual orientation (65%), more than a third said they had felt afraid of walking in public places during the past 12 months, and about one-fifth of participants reported having been victims of physical or sexual assault due to DSO. DSO was classified into four latent classes: "very high", "high", "moderate" and "low", with estimates of 2.2%, 16.4%, 35.1%, and 46.19%, respectively. CONCLUSION: We observed a high proportion of discrimination against MSM in this study. The use of LCA differentiated parsimoniously classes of discrimination.