The observer variation in the measurement of arterial blood pressure.
The observer variation in the measurement of arterial blood pressure.
复制标题
动脉血压测量中的观察者差异。
作者：
E. Eilertsen;S. Humerfelt
挪威卑尔根约 70,000 名受试者的血压调查由 19 名经过专门培训的护士在尽可能标准化的条件下进行，研究了观察者误差和观察者变异。在年龄和性别组的读数平均值方面，极端观察者之间存在显着差异，而大多数观察者仅表现出微不足道的差异。阅读特征被认为是个体观察者在不同年龄组中与其他性别的其他观察者保持相同排名位置的原因。然而，一些观察者对收缩压读数的排名与舒张压读数的排名不同。读数中末端数字偏好仅在很小程度上被发现，并且仅在少数观察者中存在。伦敦卫生学院的特殊装置被发现可以减少但不能消除这种错误。当用后一种设备获得的结果与标准设备的结果进行比较时，没有发现与受检查对象的性别、年龄和血压水平相关的读数特征的差异。
结论：即使观察者是经过精心挑选和彻底培训的，血压检查中的观察者差异也可能很大，并可能影响人口调查中发现的平均值。
Observer errors and observer variation have been studied in a survey of blood pressure covering about 70,000 subjects in Bergen, Norway, carried out by 19 specially trained nurses under conditions standardized as much as possible. Substantial differences were found between extreme observers concerning the mean values of the readings in age and sex groups, while the majority only showed insignificant differences. Reading characteristics were supposed to be the reason for individual observers keeping the same ranking position vis-a-vis the others from age group to age group in both sexes. A number of observers had, however, a different ranking in systolic from that in diastolic readings. Terminal digit preference in the readings was found only to a small degree, and only in a few of the observers. The special apparatus of the London School of Hygiene was found to reduce, but not to eliminate this error. When the results obtained with the latter apparatus were compared to standard apparatus results, no differences in the reading characteristics were found related to the sex, age and blood pressure level of the subjects examined.
Conclusion: observer variation in blood pressure examination may be substantial and may affect the mean values found in population surveys, even if the observers are carefully selected and thoroughly trained.