Chapter 1: Clinical Trials of Pain Treatment: Single Dose Trials

Question 3.2

If the standard analgesic morphine (also termed the "positive control") had been omitted to yield the results in the graph below, would this weaken the conclusion that Drug X has analgesic efficacy?

Treatments were placebo and drug X. The figure shows that Drug X gave a large amount of relief and was statistically superior to placebo.