Index of Multiple Deprivation quintiles

The Index of Multiple Deprivation (IMD) is a valuable metric in research, as it provides a standardised measure of socioeconomic status across geographic areas.

The convention is to map the IMD data in the observation table using the concept ID 35812882. Since this is not a standard concept we will use standard_concept_id = 0 and source_concept_id = 35812882.

The IMD quintile value is stored in the value_as_number field using a number between 1 and 5. For the units, we use the concept ID 37524288, which represents quintiles.

For the observation date:

• If a measurement date is available in the source data, use that date.
• If no measurement date is available (and you have only one IMD record per person), use the individual’s observation_period_start_date.

In studies, if with multiple IMD records per person are present the record closest to the index date will be used.

An example IMD record in the observation table would look like:

…	observation_concept_id	…	value_as_number	…	unit_concept_id	…	observation_source_concept_id	…
…	0	…	2	…	37524288	…	35812882	…