FACSM, Director, Walking Behavior Laboratory, Preventive Medicine and Healthy Aging, Pennington Biomedical Research Center, Baton Rouge, LA 70808.
J Gerontol A Biol Sci Med Sci. 2013 Nov;68(11):1426-32. doi: 10.1093/gerona/glt116. Epub 2013 Aug 2.
Pedometers are more likely than accelerometers to be used in walking interventions and other applications, including wide spread adoption by lay people. The purpose of this article is to provide older adults' sex-and-age-specific normative values for accelerometer-determined steps/day, adjusted to a pedometer-based scale.
The data source was accelerometer data collected over multiple valid days (defined as ≥ 10 h/day; mean 5.8 ± SE 0.1 valid days) from 1,196 60+ year olds participating in the 2005-2006 National Health and Nutrition Examination Survey. Accelerometer data were adjusted to a pedometer scale using an established process of censoring steps counted during those minutes where activity counts totaled <500. Quintile-defined categories of adjusted steps/day (lowest, below average, average, above average, and highest) for six age groups (60-64, 65-69, 70-74, 75-79, 80-84, and 85+ years) were computed for the entire sample and separately for each sex. LMSChartmakerPro was used to create smoothed percentile curves corresponding to the 5th, 25th, 50th, 75th, and 95th percentiles.
Men aged 65-69 years defined the highest single category (>9,126 steps/day) and women aged 85+ years of age defined the lowest single category (<276 steps/day). In general, steps/day tended to decrease within each quintile-defined category as age increased. Similar patterns were apparent in the more detailed LMSChartmakerPro percentiles.
These data represent the first presentation of a detailed population distribution of normative accelerometer-determined steps/day adjusted to pedometer scaling, an instrument more likely to be used in clinical and public health applications.
计步器比加速度计更有可能用于步行干预和其他应用，包括被非专业人士广泛采用。本文的目的是为老年人提供基于加速度计的计步器调整后的性别和年龄特定的正常步数/天值。
数据来源于参加 2005-2006 年国家健康和营养调查的 1196 名 60 岁以上老年人的加速度计多日（定义为≥10 小时/天；平均 5.8±SE0.1 个有效天数）数据。使用一种已建立的方法对计步器数据进行了调整，即在活动计数总计<500 的分钟内对计步器记录的步数进行删失。为整个样本和每个性别分别计算了六个年龄组（60-64 岁、65-69 岁、70-74 岁、75-79 岁、80-84 岁和 85 岁以上）的调整后步数/天（最低、低于平均、平均、高于平均和最高）五分位定义类别。使用 LMSChartmakerPro 为 5 分位、25 分位、50 分位、75 分位和 95 分位创建了平滑百分位数曲线。
65-69 岁的男性定义了最高的单一类别（>9126 步/天），而 85 岁以上的女性定义了最低的单一类别（<276 步/天）。一般来说，随着年龄的增长，在每个五分位定义的类别内，步数/天呈下降趋势。在更详细的 LMSChartmakerPro 百分位数中，也可以看到类似的模式。
这些数据代表了第一个详细的人群分布，这些数据是基于加速度计的调整后计步器正常步数/天值，这一仪器更有可能用于临床和公共卫生应用。
