Singh Tajinder P, Evans Sarah
Department of Cardiology, Children's Hospital Boston, 300 Longwood Ave., Boston, MA 02115, USA.
Arch Pediatr Adolesc Med. 2010 May;164(5):479-84. doi: 10.1001/archpediatrics.2010.57.
To determine whether socioeconomic (SE) position is associated with first-minute (1-minute) heart rate (HR) recovery in healthy children and adolescents (hereafter referred to as children).
In a cross-sectional study, we compared 1-minute HR recovery in 3 groups of children (low, medium, and high SE) using multivariable analysis. The groups were based on neighborhood SE data extracted from the US 2000 census database.
Children's Hospital Boston.
Four hundred eighty children referred for exercise testing to exclude cardiac disease and discharged as showing normal results.
Socioeconomic position and body mass index (BMI).
Heart rate recovery after a maximal treadmill exercise test (Bruce protocol) following a consistent 1-minute cool-down period.
The low SE group had a higher proportion of children with a high BMI (> or =85th percentile) (P = .07) and exercised for a shorter duration, controlling for age, sex, and BMI (P < .001). After adjusting for age (P < .001) and sex (P < .001), a significant interaction of SE group with BMI was found (P = .04). There was no difference in HR recovery in the 3 SE groups in children with a normal BMI (<85th percentile). Among children with a high BMI, only those from low and middle SE neighborhoods had impaired 1-minute HR recovery.
Children with a high BMI in low and middle SE positions appear to have worse cardiovascular health compared with children with a high BMI in a high SE position.
确定社会经济（SE）地位是否与健康儿童及青少年（以下简称儿童）的第1分钟心率（HR）恢复情况相关。
在一项横断面研究中，我们采用多变量分析比较了3组儿童（低、中、高SE）的第1分钟HR恢复情况。这些分组基于从美国2000年人口普查数据库中提取的社区SE数据。
波士顿儿童医院。
480名因运动测试前来排除心脏病且测试结果正常后出院的儿童。
社会经济地位和体重指数（BMI）。
在进行一致的1分钟冷却期后，通过最大运动平板试验（布鲁斯方案）后的心率恢复情况。
低SE组中BMI较高（≥第85百分位数）的儿童比例更高（P = 0.07），且在控制年龄、性别和BMI后运动持续时间更短（P < 0.001）。在调整年龄（P < 0.001）和性别（P < 0.001）后，发现SE组与BMI之间存在显著交互作用（P = 0.04）。BMI正常（<第85百分位数）的儿童中，3个SE组的HR恢复情况无差异。在BMI较高的儿童中，只有来自低SE和中SE社区的儿童第1分钟HR恢复受损。
与高SE地位且BMI较高的儿童相比，低SE和中SE地位且BMI较高的儿童似乎心血管健康状况更差。
