This value set includes codes based on the following rules:

• Include these codes as defined in http://dicom.nema.org/resources/ontology/DCM

  Code	Display	Definition
  121414	Standard deviation of population	Standard deviation of a measurement in a reference population.
  121417	2 Sigma deviation of population	2 Sigma deviation of a measurement in a reference population.
  130615	Interquartile Range to Median ratio of population	The interquartile range value of a population divided by the median value of the same population. IQR/M, which is one way to describe the variability of a set of measurements, is sometimes used as a metric of measurement quality.
  130614	Interquartile Range of population	The width of the center range within which 50% of the measured values in a reference population fall. The IQR may also be described as the first quartile value subtracted from the third quartile value, or equivalently the 25th percentile value subtracted from the 75th percentile value.

• Include these codes as defined in http://snomed.info/sct

  Code	Display
  371919006	1 Sigma Lower Value of population
  371918003	2 Sigma Lower Value of population
  371888009	5th Percentile Value of population
  371890005	10th Percentile Value of population
  371917008	1 Sigma Upper Value of population
  371920000	2 Sigma Upper Value of population
  373098007	Mean Value of population
  371889001	95th Percentile Value of population
  371887004	90th Percentile Value of population
  373099004	Median Value of population