Duncan Michael J, Eyre Emma L J, Bryant Elizabeth, Birch Samantha L
Sport and Exercise Applied Research Group, Faculty of Health and Life Sciences, Coventry University , Coventry , UK.
Ann Hum Biol. 2014 Sep-Oct;41(5):389-94. doi: 10.3109/03014460.2014.881919. Epub 2014 Feb 6.
Evidence-based pedometer cut-points for health have not been sufficiently examined in the context of ethnicity.
To (1) evaluate previously described steps/day cut-points in a sample of White and South Asian British primary school children and (2) use ROC analysis to generate alternative, ethnic specific, steps/day cut-offs for children.
Height, body mass and pedometer determined physical activity were assessed in 763 British children (357 boys and 406 girls) from White (n = 593) and South Asian (n = 170) ethnic groups, aged 8-11 years.
The Vincent and Pangrazi cut-points significantly predicted BMI in white (p = 0.006, Adjusted R(2 )= 0.08) and South Asian children (p = 0.039, Adjusted R(2 )= 0.078). The Tudor-Locke et al. cut-points significantly predicted BMI in White children (p = 0.0001, Adjusted R(2 )= 0.079) but not South Asian children (p < 0.05). ROC analysis indicated significant alternative cut-points in White and South Asian boys and girls (all p = 0.04 or better, Adjusted R(2 )= 0.091 for White and 0.09 for South Asian children). Subsequent cut-points associated with healthy weight, when translated to steps/day were 13,625 for White boys, 13,135 for White girls, 10,897 for South Asian boys and 10,161 for South Asian girls.
Previously published steps/day cut-points for healthy weight may not account for known ethnic variation in physical activity between White and South Asian children in the UK. Alternative, ethnic-specific, cut-points may be better placed to distinguish British children based on pedometer-determined physical activity.
基于证据的健康计步器切点在种族背景下尚未得到充分研究。
（1）在英国白人及南亚裔小学生样本中评估先前描述的每日步数切点；（2）使用ROC分析为儿童生成替代的、特定种族的每日步数临界值。
对来自白人（n = 593）和南亚裔（n = 170）种族群体、年龄在8 - 11岁的763名英国儿童（357名男孩和406名女孩）进行身高、体重及计步器测定的身体活动评估。
文森特和庞格拉齐切点在白人儿童（p = 0.006，调整后R² = 0.08）和南亚裔儿童（p = 0.039，调整后R² = 0.078）中显著预测了BMI。图德 - 洛克等人的切点在白人儿童中显著预测了BMI（p = 0.0001，调整后R² = 0.079），但在南亚裔儿童中未显著预测（p < 0.05）。ROC分析表明，在白人和南亚裔男孩及女孩中存在显著的替代切点（所有p = 0.04或更佳，白人儿童调整后R² = 0.091，南亚裔儿童调整后R² = 0.09）。与健康体重相关的后续切点，换算为每日步数时，白人男孩为13,625步，白人女孩为13,135步，南亚裔男孩为10,897步，南亚裔女孩为10,161步。
先前公布的健康体重每日步数切点可能未考虑到英国白人和南亚裔儿童在身体活动方面已知的种族差异。替代的、特定种族的切点可能更适合根据计步器测定的身体活动来区分英国儿童。
