Association between perceived racial discrimination and hypertension: findings from the ELSA-Brasil study

Towards the multileveled and processual conceptualisation of racialised individuals in biomedical research

In this paper, we discuss the processes of racialisation on the example of biomedical research. We argue that applying the concept of racialisation in biomedical research can be much more precise, informative and suitable than currently used categories, such as race and ethnicity. For this purpose, we construct a model of the different processes affecting and co-shaping the racialisation of an individual, and consider these in relation to biomedical research, particularly to studies on hypertension. We finish with a discussion on the potential application of our proposition to institutional guidelines on the use of racial categories in biomedical research.

Assessment by ABPM verified the presence of hypertension in patients with self-reported hypertension, pregnant women, as well as differences between ethnicities in women aged 39–39 years in the Ribeirão Preto cohort

Introduction: Arterial hypertension is a global health problem and one of the main risk factors for cardiovascular diseases (CVD), and therefore for morbidity and mortality among adult men and women. Factors related to obstetric history, family history, sociodemographic characteristics, and lifestyle habits are known determinants of arterial hypertension.

Methods: Case-control study of women belonging to the 1978/79 birth cohort conducted in the city of Ribeirão Preto/SP. Sociodemographic data, presence of comorbidities, maternal comorbidities, paternal comorbidities, comorbidities during pregnancy, and biometric and biophysical markers associated with blood pressure measured by 24-h ambulatory blood pressure monitoring (ABPM) were assessed in women aged 38–39 years. We want to study which variables of the previous sentence are related to the presence of hypertension measured by ABPM.

Results: Data from 281 women were analyzed. Our results showed that ethnicity, a history of hypertension, and gestational hypertension reported by the women were significantly associated with the presence of hypertension measured by ABPM. Other factors such as marital status, educational level, comorbidities of the woman, paternal or maternal comorbidities, anthropometric measurements or serum levels of cardiovascular markers were not associated with the presence of hypertension measured by ABPM.

Conclusion: We conclude that ethnicity, self-reported hypertension, and gestational hypertension are associated with arterial hypertension measured by ABPM.

Intersectional Discrimination Index: Initial stages of cross-cultural adaptation to Brazilian Portuguese

OBJECTIVE

To perform the cross-cultural adaptation of Intersectional Discrimination Index (InDI) into Brazilian Portuguese. InDI assesses the health impacts of intersectional experiences with anticipated (InDI-A), day-to-day (InDI-D), and major (InDI-M) discrimination.

METHODS

The following steps were taken: (1) independent translations; (2) synthesis of translations; (3) evaluation by an expert committee; (4) analysis by members of the target population; (5) back translation; and (6) pre-test. Based on the evaluation by the expert committee, the content validity coefficient (CVC) was calculated for each item and for the entire instrument. CVC helped identify which items needed adjustments according to the criteria of language clarity, theoretical relevance, and practical relevance.

RESULTS

Of the 31 items, 24 were considered adequate and seven required further language adjustments. CVC values were satisfactory for clarity (CVCt=0.86), practical relevance (CVCt=0.87), and theoretical pertinence (CVCt=0.87); a good level of understanding was reported by the target population (mean=4.44; standard deviation=1.36). The average response time was 15.5 minutes, and no additional difficulties in interpreting the items were reported. The back-translated InDI was approved by the original authors of the instrument.

CONCLUSION

The initial stages of the cross-cultural adaptation process showed that the use of InDI looks promising in Brazil. Further studies still need to examine the psychometric properties of the instrument to confirm the positive results of our work, as well as its usefulness for assessing the health impacts of intersectional experiences with discrimination.

Association between race/color and incidence of hypertension in the ELSA-Brasil population: investigating the mediation of racial discrimination and socioeconomic position

OBJECTIVE

To investigate the mediation effect of socioeconomic position and racial discrimination in the association between race/color and incidence of hypertension in 4-years follow up.

METHODS

We included 8,370 participants of the Longitudinal Study of Adult Health (ELSA-Brasil). A latent variable was constructed to represent socioeconomic position (SEP). The perception of discrimination was measured through an adaptation of the Lifetime Major Events Scale; and hypertension was defined using standard criteria. We investigated Body Mass Index (BMI) due to its role in proximal risk for hypertension. To investigate the mediating role of SEP and racial discrimination, we used structural equation modeling.

RESULTS

SEP had a direct and negative effect on HT incidence (HT incidence increased in worse SEP categories), while the effect of BMI on HT was direct and positive. We did not find significant direct effects of race/color and racial discrimination on HT. As for indirect effects, we observed associations between race/color and HT only through SEP mediation.

CONCLUSION

According to our results, race/color is indirectly related to HT incidence, mediated by SEP. Racial discrimination was not a mediator in the relationship between race/color and HT in the follow-up period.

Etapas iniciais da adaptação transcultural do Intersectional Discrimination Index para o português do Brasil

RESUMO Objetivo: O presente estudo realizou a adaptação transcultural do Intersectional Discrimination Index (InDI) para o português do Brasil. Trata-se de um instrumento composto de 31 itens, que visa mensurar os impactos para a saúde de experiências interseccionais com discriminação antecipada (InDI-A), cotidiana (InDI-D) e maior (InDI-M). Métodos: Foram percorridas as seguintes etapas: (1) traduções independentes; (2) síntese das traduções; (3) avaliação por comitê de especialistas; (4) análise por membros da população-alvo; (5) tradução reversa; e (6) pré-teste. Calculou-se igualmente o coeficiente de validade de conteúdo (CVC) de cada um dos itens e de todo o instrumento. O CVC foi empregado por permitir identificar quais itens necessitavam de ajustes de acordo com os critérios de clareza de linguagem, relevância teórica e pertinência prática. Resultados: Dos 31 itens do instrumento, 24 foram considerados adequados e sete necessitaram de ajustes de linguagem. Os valores dos CVC foram satisfatórios para os critérios de clareza de linguagem (CVCt=0,86), pertinência prática (CVCt=0,87) e relevância teórica (CVCt=0,87), e o público-alvo considerou satisfatória a compreensão do instrumento (média=4,44; desvio padrão=1,36). O tempo médio de resposta foi de 15,5 minutos e não foram registradas dúvidas adicionais. A tradução reversa foi aprovada pelos autores originais do instrumento. Conclusão: As etapas iniciais do processo de adaptação transcultural mostraram que o InDI parece promissor para uso no Brasil. Estudos futuros ainda precisam examinar as propriedades psicométricas do instrumento para confirmar os resultados positivos do presente trabalho, bem como sua utilidade para a avaliação dos impactos para a saúde de experiências interseccionais com discriminação.

Identifying patterns of diurnal blood pressure variation among ELSA-Brasil participants

Ambulatory blood pressure monitoring (ABPM) is the gold standard method for the diagnosis of hypertension. ABPM provides a set of repeated measurements for blood pressure (BP), usually over 24 h. Traditional approaches characterize diurnal BP variation by single ABPM parameters such as average and standard deviation, regardless of the temporal nature of the data. In this way, information about the pattern of diurnal BP variation and relationship between parameters is lost. The objective of this study was to identify and characterize daily BP patterns considering the set of repeated measures from 24-h ABPM. A total of 859 adult participants of the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil) performed a 24-h ABPM record. Hypertension, sex, age, race/color, education, marital status, smoking, alcohol, physical activity, and BMI were the covariables analyzed. Techniques for longitudinal clustering, multinomial models, and models with mixed effects were used. Three daily BP patterns were identified. Daily BP patterns with high BP presented higher standard deviation and morning surge and lower nocturnal dipping. They showed greater systolic BP variability and faster rise than fall in diastolic BP during sleep. Hypertensive, "pardos," and men had greater odds to present these patterns. Daily BP patterns with high BP presented the worst profile concerning ABPM parameters associated with cardiovascular risk. The daily BP patterns identified contribute to the characterization of diurnal BP variation.