Explanation Authors should give full details of how the primary and secondary outcomes were measured and whether any particular steps were taken to enhance the reliability of the measurements.
Some outcomes are easier to measure than others.
Some strategies can be used to enhance the quality of measurements. For example, assessment of blood pressure is more reliable if based on more than one reading, and digit preference can be avoided by using a random zero sphygmomanometer. If a trial requires taking unfamiliar measurements, then formal, standardized training of the people who will be taking the measurements can be beneficial.