Kwon Soyang, Mason Maryann, Welch Sarah
Stanley Manne Children's Research Institute, Ann and Robert H. Lurie Children's Hospital of Chicago, 225 E. Chicago Ave., Box 157, Chicago, IL 60611-2605.
J Sch Health. 2015 Jun;85(6):382-7. doi: 10.1111/josh.12262.
We compared moderate-to-vigorous intensity physical activity (MVPA) and inactivity levels among fifth and sixth graders during school hours according to school-level race/ethnicity and income attributes to inform school-based obesity interventions in Illinois Suburban Cook County (SCC).
Fifth- and sixth-grade students (N = 591) in 14 SCC public schools were asked to wear an accelerometer during school hours for 4 consecutive school days. School-level race/ethnicity was assigned based on the majority (≥ 70%) race/ethnicity of the student population: white (N = 4), black (N = 2), Hispanic (N = 5), or "mixed" (N = 3). All minority schools (N = 7) fell within a low-income category.
A total of 538 students (91%) had valid accelerometry data. Average MVPA time during school hours was 20 minutes/day for boys and 11 minutes/day for girls. Multilevel linear regression models showed that compared to peers in white schools, boys, and girls in Hispanic schools engaged in 14 and 10 minutes less MVPA, respectively (p < .01). Girls in black and Hispanic schools had greater inactivity time than girls in white schools (p < .01).
Objectively measured physical activity (PA) data support the need for school-level PA interventions during school hours, particularly in predominantly Hispanic schools.
我们根据学校层面的种族/族裔和收入属性，比较了伊利诺伊州库克县郊区（SCC）五、六年级学生在上课时间的中等至剧烈强度身体活动（MVPA）和不活动水平，以为该校的肥胖干预措施提供参考。
邀请了SCC 14所公立学校的五、六年级学生（N = 591）在上课时间连续4个上学日佩戴加速度计。学校层面的种族/族裔根据学生群体中的多数（≥70%）种族/族裔来划分：白人（N = 4）、黑人（N = 2）、西班牙裔（N = 5）或“混合”（N = 3）。所有少数族裔学校（N = 7）都属于低收入类别。
共有538名学生（91%）有有效的加速度计数据。男生上课时间的平均MVPA时间为每天20分钟，女生为每天11分钟。多层次线性回归模型显示，与白人学校的同龄人相比，西班牙裔学校的男生和女生的MVPA分别少14分钟和10分钟（p <.01）。黑人学校和西班牙裔学校的女生比白人学校女生的不活动时间更长（p <.01）。
客观测量的身体活动（PA）数据支持在上课时间进行学校层面的PA干预的必要性，特别是在以西班牙裔为主的学校。
