Background Obesity is increasing in younger populations, and is associated with a high cardiovascular (CV) risk, however, it is not clear whether metabolically healthy obesity (MHO) may have a lower CV risk or if it is just an earlier stage of the disease. Objective To evaluate the prevalence and CV risk factors associated with MHO in a young population assisted by a Family Health Care unit in a large urban center in Brazil. Methods A cross-sectional population study for CV risk assessment in adults aged 20-50 years old from a FHC unit in Rio de Janeiro. Demographic, anthropometric data and CV risk factors were recorded. All underwent office blood pressure (OBP) measurements, laboratory evaluation (lipid and glycidic profile). Obesity was defined as a BMI ≥ 30 kg/m2 and MHO are those who have less than 3 of the following criteria: hypertension, diabetes, total cholesterol ≥ 200 mg/dL, HDL<40 mg/dL (men) and 50 mg/dL (women), triglycerides>150 mg/dL and increased waist circumference. Results A total of 632 individuals were evaluated (60% female; mean age 37 ± 9 years). The prevalence of obesity was 26%, of which 73% were classified as MHO. Obeses are older, with a higher prevalence of physical inactivity (51% vs 41%, p = 0.03), hypertension (44% vs 19%, p < 0.001), dyslipidemia (50% vs 36%, p = 0.002) and diabetes (7% vs 2%, p = 0.001) with higher systolic OBP. MHO compared to unhealthy ones are significantly younger and smoke less. Despite being obese, they have lower BMI (33.6 vs 35.2 kg/m2, p = 0.02) and abdominal circumference (102 vs 110 cm, p = 0.03), with lower diastolic BP. Conclusions MHO was more prevalent in this young population and seems to have a lower CV risk, however it is not clear whether these younger and less obese individuals are only at an earlier stage of the disease. Perhaps the CV diseases onset is postponed for a few years. Even so, these individuals should not be excluded from public health policies as a form of primary prevention. Key messages In this young population, MHO was more prevalent and presented a lower CV risk. The follow-up of MHO will show if they are really healthy or if they are at an early stage of the disease.

Background The new hypertension (HT) guidelines recommend the use of out-of-office blood pressure (BP) measures for its diagnosis however, in the scope of public health in Brazil, it is still based on office BP (OBP) for logistical and financial reasons. Furthermore, in our country, it is not yet clear whether the use of out-of-office BP would really be more reliable for the diagnosis. Objective To evaluate the importance of using Home Blood Pressure Monitoring (HBPM) in diagnosing HT in a young adult population in primary care in Brazil. Methods A cross-sectional population study enrolled adults between 20 and 50 years in a primary healthcare unit in Rio de Janeiro. Office BP was the mean value of 2 measures, while the HBPM followed a 7-day protocol. It was considered normal a Home BP < 135x85 mmHg and OBP <140x90 mmHg. Patients were classified into 4 phenotypes: normotension (controlled OBP and HBPM); white coat HT (uncontrolled OBP and controlled HBPM); masked HT (controlled OBP and uncontrolled HBPM) and sustained HT (uncontrolled OBP and HBPM). Results A total of 462 individuals were enrolled [38% males; mean age 36±9 years]. Sedentary lifestyle (43%), dyslipidemia (38%) and obesity (28%) were the main CV risk factors. OBP, the prevalence of HT was 13%, HBPM it was 19%, with low concordance between them (kappa=0.472). After HBPM, 17% changed the diagnosis, being 6% of them white-coat HT and 11% masked HT. The variables that were independently associated with HT diagnosed by OBP were male gender (OR 1.83,CI95%:1.01-3.33,p=0.04) and increased neck circumference (OR 3.77,CI95%:1.59-8.93,p=0.003), whilst by HBPM they were obesity (OR 2.18,CI95%:1.27-3.76,p=0.005) and increased neck circumference (OR 2.37,CI95%:1.05-5.33,p=0.04). Conclusions If the diagnosis was based only in the office BP values, 17% of the subjects would've had an erroneous diagnosis of hypertension, suggesting the importance of implementing out-of-office BP measurements in primary care. Key messages Home monitoring blood pressure corrected the diagnosis of hypertension of 17% of patients, allocating them correctly into white-coat HT and masked HT. Increased neck circumference was independently associated with the diagnosis of hypertension by both methods.