Instituto Federal de Educação, Ciência e Tecnologia do Acre (Federal Institute of Education, Science and Technology of Acre; IFAC), Rio Branco (AC), Brazil.
Graduate Program in Collective Health, Federal University of Acre (UFAC), Rio Branco (AC), Brazil.
Am J Hypertens. 2020 Jan 1;33(1):77-83. doi: 10.1093/ajh/hpz129.
Evidence suggests that sleep duration is related to blood pressure (BP), but the findings are still inconsistent for adolescents.
To analyze the association between sleep duration and BP in Brazilian adolescents between 12 and 17 years of age.
This study is part of the Study of Cardiovascular Risk in Adolescents (ERICA), a multicenter, school-based, cross-sectional study in 273 municipalities in Brazil. The sample consisted of 65,643 adolescents. Sleep duration was measured by a subjective method, and BP was measured by the oscillometric method. Multiple linear regression analyses were performed to evaluate the association between sleep duration and BP.
The mean sleep duration was 8.14 hours (± 1.40), with significant difference between the groups according to BP levels (P < 0.0001). The mean systolic and diastolic BP were 110.59 (± 11.87) and 65.85 (± 7.94) mm Hg, respectively, in the group of adolescents. Sleep duration was significantly associated with BP. Each increase 1 hour in sleep was associated with BP reduction in both sexes combined (P < 0.0001). Considering the effects of covariates, each increase 1 hour in sleep was associated with systolic BP (SBP) reduction among boys (P = 0.004) and SBP elevation among girls (P = 0.009), after full adjustment.
The results suggest that each increase in sleep duration was associated with SBP elevation among girls. Such findings may have important implications for cardiovascular health in adolescence.
有证据表明，睡眠时间与血压（BP）有关，但青少年的研究结果仍不一致。
分析巴西 12 至 17 岁青少年的睡眠时间与血压之间的关系。
本研究是青少年心血管风险研究（ERICA）的一部分，这是一项在巴西 273 个城市进行的多中心、基于学校的横断面研究。该样本包括 65643 名青少年。睡眠时间通过主观方法测量，血压通过振荡法测量。进行多线性回归分析以评估睡眠时间与血压之间的关系。
平均睡眠时间为 8.14 小时（±1.40），根据血压水平，各组之间存在显著差异（P <0.0001）。组内青少年的平均收缩压和舒张压分别为 110.59（±11.87）和 65.85（±7.94）mmHg。睡眠时间与血压显著相关。睡眠时间每增加 1 小时，男女两性的血压均降低（P <0.0001）。考虑到协变量的影响，睡眠时间每增加 1 小时，男孩的收缩压（SBP）降低（P = 0.004），女孩的 SBP 升高（P = 0.009），经完全调整后。
结果表明，睡眠时间的增加与女孩的 SBP 升高有关。这些发现可能对青春期心血管健康具有重要意义。
