masked monitoring

masked monitoring

The evaluation or ongoing assessment of patients in a blinded clinical trial without the physician or the monitor knowing which patient is receiving therapy or a placebo.
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The number of patients experiencing the composite outcome did not differ between those randomized to open or masked STAN fetal heart rate monitoring, with 79 of 5,532 in the open monitoring group (1.43%) and 70 of 5,576 in the masked monitoring group (1.26%) experiencing one or more events (relative risk, 1.14), said Dr.