IJCS | Volume 32, Nº6, November / December 2019

617 Table 1 - Values obtained in the ABPM of 902 patients (January to December / 2016) Mean ± SD (95%CI) Minimum value Maximum value Age 57.47 ± 15.429 18 94 MASBP 129.12 ± 12.940 94 185 MADBP 81.56 ± 10.745 51 118 MRSBP 116.73 ± 14.643 82 174 MRDBP 68.81 ± 10.364 43 105 MAX SBP 163.95 ± 21.566 114 255 MIN SBP 102.72 ± 12.435 68 152 24HMSBP 126.14 ± 12.641 93 180 24HMDBP 78.54 ± 10.210 50 115 Systolic dipping 9.50 ± 7.766 -27 28 Diastolic dipping 15.52 ± 9.215 -16 42 Maximum temperature 23.929 ± 5.930 13.0 39.0 Minimum temperature 14.759 ± 5.191 3.0 25.4 Mean temperature 18.493 ± 5.281 8.0 29.0 Relative air humidity 77.149 ± 10.164 49.2 97.25 ABPM: ambulatory blood pressure monitoring; SD: standard deviation; CI: confidence interval; MASBP/MADBP: mean awake systolic and diastolic blood pressure; MRSBP/MRDBP: mean resting systolic and diastolic blood pressure; MAX SBP/MIN SBP: maximum and minimum systolic blood pressure; 24HMSBP/24HMDBP: 24H mean systolic and diastolic blood pressure. Escosteguy et al. Temperature variation in blood pressure Int J Cardiovasc Sci. 2019;32(6):615-622 Original Article ischemic and hemorrhagic strokes, and premature death. It should not be treated alone, and the approach should include lifestyle changes (LSC) for these patients and the use of antihypertensive medications. In Brazil, it is considered a public health problem, requiring public policy strategies aimed at preventing the development of AH. 1-3 In a study entitled ELSA-BRASIL - Longitudinal Study of Adult Health ( Estudo Longitudinal de Saúde do Adulto ) 6 carried out between 2008 and 2010, involving 15,105 individuals between the ages of 35 and 74, the authors found almost 36% of hypertensive individuals in the study population, corroborating the fact that AH is a serious problem, requiring early intervention and prevention measures. Guimarães et al., 7 in an ecological time-series study on mortality due to cardiovascular diseases in Brazil, observed that there was a reduction in mortality coefficients from ischemic heart disease and cerebrovascular disease in Brazil between 1980 and 2012, but the regions that showed the highest coefficients for both conditions were the southeast and south regions, which draws attention to the region in which the present study was carried out. Several studies have addressed and shown the association of risk factors such as age, 8-9 socioeconomic factor, 10 obesity, 11-14 sedentary lifestyle, 14 excessive intake of salt 13,15,16 and alcoholic beverages 17 with the development of AH. Moreira et al., 8 in a cohort study carried out in the city of Porto Alegre, involving 1,089 individuals aged 40 to 49 years, concluded that age and waist-to-height ratio are independent factors for hypertension and that the incidence of hypertension in Brazil tends to be higher than in developed countries. Picon et al., 9 in a meta-analysis, also reports that the prevalence of hypertension in the elderly in Brazil is quite high; therefore, both authors corroborate that the age factor has influence on blood pressure behavior. In the study by Bassanesi et al., 10 also carried out in Porto Alegre, premature mortality (between 45 and 64 years of age) from cardiovascular diseases was 163% higher in districts located in the worst socioeconomic quartile compared to those located in the best quartile. In this same study, almost half of the mortality from cardiovascular diseases before the age of 65 years was associated with poverty and socioeconomic factors. Regarding the association between obesity/sedentary lifestyle andAH, there aremany studies on this subject. 11-14 Galve et al., 14 reported that excess weight and sedentary lifestyle are among the leading causes of hypertension in both developed and developing countries. Salt intake is considered to be one of the main causes of elevated blood pressure according to Trieu et al., 15 and Frohlich et al., 16 and its restriction can prevent cardiovascular and renal injuries. Regarding alcohol abuse, Briassoulis et al., 17 concluded in a meta-analysis that its excessive intake, regardless of gender, also greatly increases the risk of AH. Regarding the influence of climate/temperature on blood pressure behavior, the studies, mainly in Brazil, are scarce. Worldwide, the vast majority of studies was carried out in China, with large population samples.