Std Dev PEF
No Chronic Bronchitis
3.4 out of 3.4 points
A clinical trial is run to investigate the effectiveness of an experimental drug in
reducing preterm delivery to a drug considered standard care and to a placebo.
Pregnant women are enrolled and randomly assigned to receive either the
experimental drug, the standard drug or a placebo. Women are followed through
delivery and classified as delivering preterm (< 37 weeks) or not. The data are shown