百分等级(percentile rank,PR),亦称“超前百分数”。相对位置量数。在一个按大小顺序排列的数列中,低于某分数的分数的次数与总次数的百分比,即为该分数的百分等级。用PR表示。如PR65=87.5,意指有87.5%的分数低于65分。计算公式:PR=100-(100R-50)/N,式中R为某分数在按大小排列的数列中的名次,N是分数的总次数或个数,适用于未分组的单项数列。
与北京城区老年人心理健康状况的百分等级常模进行比较处于中等水平。
The mental health of the elderly was at middle level compared with the normal standard of Beijing city's elderly.
所有患者的结果都合并成一份单一的分数报告,作为一个百分等级在所有条件相似的病例中并且跟单一的解释指引作对照。
All of the patient's results are merged into a single score reported as a percentile rank among all cases with the same condition and compared to uniform interpretation guidelines.
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