通过研究座椅的尺寸参数变化对体压分布的影响,为日常办公座椅坐姿舒适性设计提供有力的参考依据.针对6个实验对象,采用XSensor X3 PRO V6.0压力分布测试系统,测试不同坐高情况下人体坐姿体压分布及坐姿舒适性的主观评价,并对压力分布...通过研究座椅的尺寸参数变化对体压分布的影响,为日常办公座椅坐姿舒适性设计提供有力的参考依据.针对6个实验对象,采用XSensor X3 PRO V6.0压力分布测试系统,测试不同坐高情况下人体坐姿体压分布及坐姿舒适性的主观评价,并对压力分布指标采用统计分析软件SPSS 16.0进行数据处理.获得了座面和靠背的最大压力、平均压力、接触面积以及纵向压力分布曲线随坐高的变化规律,确定了基于体压分布判断日常办公座椅舒适性的指标,并求解得到日常办公座椅最舒适的坐高为-2.14,cm.展开更多
To obtain age references for sitting height (SH), leg length (LL), and SH/H ratio in the Netherlands; to evaluate how SH standard deviation score (SDS), LL SDS, SH/H SDS, and SH/LL SDS are related to height SDS; and t...To obtain age references for sitting height (SH), leg length (LL), and SH/H ratio in the Netherlands; to evaluate how SH standard deviation score (SDS), LL SDS, SH/H SDS, and SH/LL SDS are related to height SDS; and to study the usefulness of height corrected SH/H cut-off lines to detect Marfan syndrome and hypochondroplasia. Methods: Crosssectional data on height and sitting height were collected from 14 500 children of Dutch origin in the age range 0- 21 years. Reference SD charts were constructed by the LMS method. Correlations were analysed in three age groups. SH/H data from patients with Marfan syndrome and genetically confirmed hypochondroplasia were compared with height corrected SH/H references. Results: A positive association was observed between H SDS, SH SDS, and LL SDS in all age groups. There was a negative correlation between SH/H SDS and height SDS. In short children with a height SDS <- 2 SDS, a cut-off limit of + 2.5 SD leads to a more acceptable percentage of false positive results. In exceptionally tall children, a cut-off limit of - 2.2SDS can be used. Alternatively, a nomogram of SH/H SDS versus H SDS can be helpful. The sensitivity of the height corrected cut-off lines for hypochondroplasia was 80% and for Marfan syndrome only 30% . Conclusions: In exceptionally short or tall children, the dependency of the SH/H ratio (SDS) on height SDS has to be taken into consideration in the evaluation of body proportions. The sensitivity of the cut-off lines for hypochondroplasia is fair.展开更多
文摘通过研究座椅的尺寸参数变化对体压分布的影响,为日常办公座椅坐姿舒适性设计提供有力的参考依据.针对6个实验对象,采用XSensor X3 PRO V6.0压力分布测试系统,测试不同坐高情况下人体坐姿体压分布及坐姿舒适性的主观评价,并对压力分布指标采用统计分析软件SPSS 16.0进行数据处理.获得了座面和靠背的最大压力、平均压力、接触面积以及纵向压力分布曲线随坐高的变化规律,确定了基于体压分布判断日常办公座椅舒适性的指标,并求解得到日常办公座椅最舒适的坐高为-2.14,cm.
文摘To obtain age references for sitting height (SH), leg length (LL), and SH/H ratio in the Netherlands; to evaluate how SH standard deviation score (SDS), LL SDS, SH/H SDS, and SH/LL SDS are related to height SDS; and to study the usefulness of height corrected SH/H cut-off lines to detect Marfan syndrome and hypochondroplasia. Methods: Crosssectional data on height and sitting height were collected from 14 500 children of Dutch origin in the age range 0- 21 years. Reference SD charts were constructed by the LMS method. Correlations were analysed in three age groups. SH/H data from patients with Marfan syndrome and genetically confirmed hypochondroplasia were compared with height corrected SH/H references. Results: A positive association was observed between H SDS, SH SDS, and LL SDS in all age groups. There was a negative correlation between SH/H SDS and height SDS. In short children with a height SDS <- 2 SDS, a cut-off limit of + 2.5 SD leads to a more acceptable percentage of false positive results. In exceptionally tall children, a cut-off limit of - 2.2SDS can be used. Alternatively, a nomogram of SH/H SDS versus H SDS can be helpful. The sensitivity of the height corrected cut-off lines for hypochondroplasia was 80% and for Marfan syndrome only 30% . Conclusions: In exceptionally short or tall children, the dependency of the SH/H ratio (SDS) on height SDS has to be taken into consideration in the evaluation of body proportions. The sensitivity of the cut-off lines for hypochondroplasia is fair.
