Health and Use of Time Group, Sansom Institute, University of South Australia, Australia.
Prev Med. 2010 Sep-Oct;51(3-4):253-8. doi: 10.1016/j.ypmed.2010.07.001. Epub 2010 Jul 11.
Examine: (1) the anthropometric, socio-demographic and use-of-time characteristics of thin adolescents, and (2) compare these characteristics to other weight status categories.
Data were from the 2007 National Children's Nutrition and Physical Activity Survey which collected data on a random sample of 2200 9 to 16 year old Australians from February to August 2007. Seven socio-demographic variables, anthropometric data (height and weight were measured) and nine use-of-time variables were used, and compared across the weight status categories. Physical activity was measured using pedometers and the Multimedia Activity Recall for Children and Adults.
5.3% of adolescents were classified as thin, a percentage which did not significantly vary by age, sex, indigenous status, household income, education level or family structure. Relative to other adolescents, thin adolescents were shorter and lighter. Thin adolescents were less active than their normal weight peers, but walked further and accumulated significantly less screen and TV time than obese adolescents.
Thin adolescents were found in similar proportions across all socio-demographic bands. Thin adolescents recorded similar physical activity levels to their normal weight peers, but were more active than obese adolescents. The findings from the study support in part the theory of thinness related developmental delay.
探讨：（1）瘦青少年的人体测量学、社会人口统计学和时间利用特征；（2）将这些特征与其他体重状况类别进行比较。
数据来自 2007 年全国儿童营养与体力活动调查，该调查于 2007 年 2 月至 8 月期间对 2200 名 9 至 16 岁的澳大利亚人进行了随机抽样。使用了 7 个社会人口统计学变量、人体测量数据（身高和体重）和 9 个时间利用变量，并根据体重状况类别进行了比较。使用计步器和儿童及成人多媒体活动回忆法测量了身体活动。
5.3%的青少年被归类为消瘦，这一比例在年龄、性别、土著地位、家庭收入、教育水平或家庭结构方面没有显著差异。与其他青少年相比，消瘦青少年更矮、更轻。消瘦青少年的活动量低于正常体重的同龄人，但步行距离更远，屏幕和电视时间明显少于肥胖青少年。
消瘦青少年在所有社会人口统计学群体中的比例相似。消瘦青少年的身体活动水平与正常体重的同龄人相似，但比肥胖青少年更活跃。研究结果部分支持与消瘦相关的发育迟缓理论。
