How many blood pressure measurements are enough? An application of generalizability theory to the study of blood pressure reliability.
How many blood pressure measurements are enough? An application of generalizability theory to the study of blood pressure reliability.
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DOI：
10.1111/j.1469-8986.1988.tb00967.x
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发表时间：
1988
期刊：
影响因子：
3.7
通讯作者：
M. Llabre;G. Ironson;S. Spitzer;M. Gellman;D. Weidler;N. Schneiderman
中科院分区：
文献类型：
--
作者：
M. Llabre;G. Ironson;S. Spitzer;M. Gellman;D. Weidler;N. Schneiderman
概化理论被应用于在不同设计下收集的血压测量，以确定获得可靠估计所需的读数数量。这些设计评估了实验室、家庭和工作中同一天内的差异；实验室中不同天的差异；以及不同测量设备的差异。两名血压正常的受试者(n=40和n=79)参与了这项研究。使用水银血压计、Dinamap成人/儿科监护仪或Spacelabs动态监护仪测量血压。结果表明，当在实验室中将概括限制在同一天时，只需要一次读数。家庭和工作场所至少需要6个收缩压读数，工作场所和家庭可能分别需要6到10个舒张压读数。为了概括几天的情况，可能需要从两天中的每一天读取一到两个收缩压的读数，并从三天以上的舒张压中读取一到两个读数。为了在实验室中推广使用不同的仪器，至少需要两种仪器各重复一次。
Generalizability theory was applied to blood pressure measurements collected under various designs in order to determine the number of readings needed to attain reliable estimates. The designs assessed variation within the same day in the laboratory, home, and work; variation across days in the laboratory; and variation across measuring devices. Two samples of normotensive (n=40 and n=79) subjects participated in the study. Blood pressure was measured using either a mercury sphygmomanometer, a Dinamap Adult/Pediatric monitor, or a Spacelabs Ambulatory monitor. The results showed that only one reading is necessary whenever generalizations are restricted to the same day in the laboratory. At least six readings of systolic blood pressure are needed at home and at work, and 6 to 10 diastolic blood pressure readings may be required from work and home, respectively. To generalize across days, one or two readings from each of two days for systolic blood pressure and from more than three days for diastolic blood pressure may be required. At least one replication with each of two instruments is necessary in order to generalize across instruments in the laboratory.