Sharrack B, Hughes R A
Department of Neurology, United Medical School, Guy's Hospital, London.
BMJ. 1997;315(7123):1652-4. doi: 10.1136/bmj.315.7123.1652.
To assess the reliability and accuracy of distance estimated by doctors and patients.
Comparison between estimated and measured distances of six familiar sites around Guy's Hospital, London.
100 hospital consultants and 100 patients.
Median (range) of estimated distances, and mean (SD) of the difference between estimated and measured distances.
Both doctors and patients gave a wide range of estimates of distance. The estimates differed by up to 14.6-fold from the measured distances, and the difference between minimum and maximum estimates was up to 62.5-fold.
Doctors and patients were inaccurate at estimating distances, which implies that estimates of distances walked are not reliable indicators of a person's health.
评估医生和患者估计距离的可靠性和准确性。
对伦敦盖伊医院周围六个常见地点的估计距离和测量距离进行比较。
100名医院顾问医生和100名患者。
估计距离的中位数（范围），以及估计距离与测量距离之间差异的均值（标准差）。
医生和患者对距离的估计范围都很广。估计距离与测量距离相差高达14.6倍，最小估计值与最大估计值之间的差异高达62.5倍。
医生和患者在估计距离方面不准确，这意味着步行距离的估计不是一个人健康状况的可靠指标。
