The role of numeracy in understanding the benefit of screening mammography
The role of numeracy in understanding the benefit of screening mammography
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DOI：
10.7326/0003-4819-127-11-199712010-00003
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发表时间：
1997-12-01
影响因子：
39.2
通讯作者：
Welch, HG
中科院分区：
文献类型：
--
作者：
Schwartz, LM;Woloshin, S;Welch, HG
背景资料：有关风险和收益的定量信息可能只对那些掌握基本概率和数字概念的患者才有意义，这种概念称为numeracy.Objective：评估numeracy.Objective之间的关系，并利用典型的风险降低表达对筛查性乳腺X射线摄影的益处。从新英格兰登记处抽取的500名女性退伍军人的简单随机样本。干预：四份问卷中的一份，不同之处仅在于如何呈现乳房X光检查平均降低风险的相同信息。测量：计算能力得分为三项简单任务的正确回答总数。参与者估计了他们在有和没有乳房X光检查的情况下死于乳腺癌的风险。准确性被判断为每个女人的能力，以调整她的感知风险，按照风险降低datapresented.Results：61%的合格妇女完成了问卷。这些女性的中位年龄为68岁（范围为27至88岁），96%为高中毕业生。应用减少风险信息的准确性和计算能力都很差（三分之一的受访者认为，抛1000次硬币会导致
Background: Quantitative information about risks and benefits may be meaningful only to patients who have some facility with basic probability and numerical concepts, a construct called numeracy.Objective: To assess the relation between numeracy and the ability to make use of typical risk reduction expressions about the benefit of screening mammography.Design: Randomized, cross-sectional surveySetting: A simple random sample of 500 female veterans drawn from a New England registry.Intervention: One of four questionnaires, which differed only in how the same information on average risk reduction with mammography was presented.Measurements: Numeracy was scored as the total number of correct responses to three simple tasks. Participants estimated their risk for death from breast cancer with and without mammography. Accuracy was judged as each woman's ability to adjust her perceived risk in accordance with the risk reduction data presented.Results: 61% of eligible women completed the questionnaire. The median age of these women was 68 years (range, 27 to 88 years), and 96% were high school graduates. Both accuracy in applying risk reduction information and numeracy were poor (one third of respondents thought that 1000 flips of a fair coin would result in