Response rate in the Study of Cardiovascular Risks in Adolescents – ERICA

Abstract

OBJECTIVE To describe the response rate and characteristics of people who either took part or not in from the Study of Cardiovascular Risks in Adolescents (ERICA) , according to information subsets.METHODS ERICA is a school-based, nation-wide investigation with a representative sample of 12 to 17-year-old adolescents attending public or private schools in municipalities with over 100,000 inhabitants in Brazil. Response rate of eligible subjects were calculated according to macro-regions, sex, age, and type of school (public or private). We also calculated the percentages of replacement schools in comparison with the ones originally selected as per the sample design, according to the types of schools in the macro-regions. The subjects and non-subjects were compared according to sex, age, and average body mass indices (kg/m2).RESULTS We had 102,327 eligible adolescents enrolled in the groups drawn. The highest percentage of complete information was obtained for the subset of the questionnaire (72.9%). Complete information regarding anthropometric measurements and the ones from the questionnaire were obtained for 72.0% of the adolescents, and the combination of these data with the 24-hour dietary recall were obtained for 70.3% of the adolescents. Complete information from the questionnaire plus biochemical blood evaluation data were obtained for 52.5% of the morning session adolescents (selected for blood tests). The response percentage in private schools was higher than the one in public schools for most of the combination of information. The ratio of older and male adolescents non-participants was higher than the ratio among participants.CONCLUSIONS The response rate for non-invasive procedures was high. The response rate for blood collection – an invasive procedure that requires a 12-hour fasting period and the informed consent form from legal guardians – was lower. The response rate observed in public schools was lower than in the private ones, and that may reflect lower school frequency of registered students.

Prevalence of type 2 diabetes among adolescents in Brazil: Findings from Study of Cardiovascular Risk in Adolescents (ERICA)

“…Although ERICA was a large school‐based study, it had a cross‐sectional design subjected to both temporal and survival biases (although in adolescents the latter bias is less likely to occur). Also, even though the large sample size of ERICA and the careful planning and execution of this study reinforce the findings, the response rate for completion of all procedures was 52% and this may influence our results . In addition, many characteristics included in this study were based on self‐report, which may have resulted in information bias and misclassification.…”

“…The response rate for completion of all procedures, including blood collection, was 52%. A thorough description of the response rate in the ERICA is available elsewhere …”

“…A thorough description of the response rate in the ERICA is available elsewhere. 17 All adolescents who agreed in participate in the study provided a written informed assent, and an informed consent signed by the parent or legal guardian. ERICA was approved by the Institutional Review Boards of all 27 federation units in Brazil.…”

Accuracy of self‐reported hypertension in Brazilian adolescents: Analysis of the Study of Cardiovascular Risk in Adolescents

“…Other studies provide additional details about the sampling process, losses, and refusals. [13][14][15] The study adolescents were 12-17 years old, had no temporary or permanent physical and/or mental disabilities, and were not pregnant. The data were collected in 2013 and 2014.…”

Profile of access and use of medicines in the Brazilian population – contributions and challenges of PNAUM – Household Survey

“…Gadelha et al 8 , when contextualizing the construction process of the PNAUM, also feature elements of public policy related to Science, Technology, and Innovation in Health that had been developed and implemented in Brazil at the time when this national survey was conducted. Opening the collection of articles, generated in the context of this research, the authors present conceptual aspects and prospects of development and consolidation of strategies for pharmaceutical policies by the Ministry of Health.…”