A randomized clinical experiment to compare two types of endotracheal tubes utilized a block design where each of the six participating anesthesiologists performed tube insertions for an equal number of patients for each type of tube. Five…
There are no well-designed placebo-controlled clinical trials in the recent era that precisely define the magnitude of the drug effect of antimicrobial therapy for mild community-acquired pneumonia (CAP). However, there is evidence that ineffective…
For repeated-measures trials with continuous outcomes in which one group is designated as control and the other treatment, it is sometimes advantageous to add the treatment to the control group in the last periods of the design rather than to…