March 2015 (Final data collection date for primary outcome measure)

Rehospitalization as a single outcome measure has too many problems to be used in isolation from other measures.

We were unable to demonstrate a significant difference using the revised outcome measure.

Most attention was given to the three trials that used hearing level as an outcome measure.

The primary outcome measure for the study was fatigue.

May 2011 (Final data collection date for primary outcome measure)

The main outcome measure was the event rate of heavy drinking days in the intent-to-treat population.

The incidence of coronary heart disease was the primary outcome measure in our analyses.

Other outcome measures, such as number of headache days, were not statistically significantly different between the groups.

It is important to develop outcome measures as tools for quality assessment.