Glossary

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D

data

Any observation or set of observations or measurements that represent attributes about an entity (also referred to as a data unit).

dataset

A collection of separate pieces of data related to a particular experiment, study, project or programme.

data unit

An entity for which observations or measurements can be made.

defined daily dose (DDD)

A unit of measurement of antimicrobial usage (AMU).

differential misclassification

Where the probability of an exposure being misclassified depends on outcome status. For example, a patient is more likely to remember whether they previously stopped taking antibiotics halfway through the prescribed course if they are diagnosed with a resistant infection. This is also known as ‘recall bias’.

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