van Sluijs Esther M F, Skidmore Paula M L, Mwanza Kim, Jones Andrew P, Callaghan Alison M, Ekelund Ulf, Harrison Flo, Harvey Ian, Panter Jenna, Wareham Nicolas J, Cassidy Aedin, Griffin Simon J
Medical Research Council Epidemiology Unit, Institute of Metabolic Science, Box 285, Addenbrookes Hospital, Hills Road, Cambridge, CB2 0QQ, UK.
BMC Public Health. 2008 Nov 14;8:388. doi: 10.1186/1471-2458-8-388.
The SPEEDY study was set up to quantify levels of physical activity (PA) and dietary habits and the association with potential correlates in 9-10 year old British school children. We present here the analyses of the PA, dietary and anthropometry data.
In a cross-sectional study of 2064 children (926 boys, 1138 girls) in Norfolk, England, we collected anthropometry data at school using standardised procedures. Body mass index (BMI) was used to define obesity status. PA was assessed with the Actigraph accelerometer over 7 days. A cut-off of > or = 2000 activity counts was used to define minutes of moderate-to-vigorous PA (MVPA). Dietary habits were assessed using the Health Behaviour in School Children food questionnaire. Weight status was defined using published international cut-offs (Cole, 2000). Differences between groups were assessed using independent t-tests for continuous data and chi-squared tests for categorical data.
Valid PA data (>500 minutes per day on > or = 3 days) was available for 1888 children. Mean (+/- SD) activity counts per minute among boys and girls were 716.5 +/- 220.2 and 635.6 +/- 210.6, respectively (p < 0.001). Boys spent an average of 84.1 +/- 25.9 minutes in MVPA per day compared to 66.1 +/- 20.8 among girls (p < 0.001), with an average of 69.1% of children accumulating 60 minutes each day. The proportion of children classified as overweight and obese was 15.0% and 4.1% for boys and 19.3% and 6.6% for girls, respectively (p = 0.001). Daily consumption of at least one portion of fruit and of vegetables was 56.8% and 49.9% respectively, with higher daily consumption in girls than boys and in children from higher socioeconomic backgrounds.
Results indicate that almost 70% of children meet national PA guidelines, indicating that a prevention of decline, rather than increasing physical activity levels, might be an appropriate intervention target. Promotion of daily fruit and vegetable intake in this age group is also warranted, possibly focussing on children from lower socioeconomic backgrounds.
开展SPEEDY研究旨在量化英国9至10岁学童的身体活动（PA）水平、饮食习惯及其与潜在相关因素的关联。我们在此呈现PA、饮食和人体测量数据的分析结果。
在对英国诺福克郡2064名儿童（926名男孩，1138名女孩）进行的横断面研究中，我们在学校采用标准化程序收集人体测量数据。使用体重指数（BMI）定义肥胖状况。使用Actigraph加速度计评估7天的PA情况。采用≥2000活动计数的阈值来定义中度至剧烈PA（MVPA）的分钟数。使用《学龄儿童健康行为》食物问卷评估饮食习惯。根据已发表的国际阈值（科尔，2000年）定义体重状况。使用独立t检验评估连续数据组间差异，使用卡方检验评估分类数据组间差异。
1888名儿童获得了有效的PA数据（≥3天每天>500分钟）。男孩和女孩每分钟的平均（±标准差）活动计数分别为716.5±220.2和635.6±210.6（p<0.001）。男孩每天平均进行MVPA的时间为84.1±25.9分钟，女孩为66.1±20.8分钟（p<0.001），平均69.
