Table 1.
Parent SNOMED-CT clinical codes used to define the caseness of complex mental health difficulties. All child codes of parent codes were searched, too. Also showing medication names used to indicate active caseness (i.e., ten years prior to the 31st December 2021). Medications were searched by name. The full codelist is available in supplementary material S2 Table.
Fig 1.
Visualisation of groups defined by information within electronic healthcare records.
Table 2.
Evaluation statistics and their descriptions.
Table 3.
Percentage of study-population records that contained the component diagnosis and medication criteria that defined caseness for complex mental health difficulties.
Fig 2.
Examples of the distributions of values for some component features.
Fig 3.
Examples of the distributions of values for some feature families.
Fig 4.
Scaled mutual information for all informative feature sets in rank order.
Rank is presented in log10 to illustrate how tightly packed the scaled mutual information scores were across orders of magnitude of rank (illustrated by the straight-line fit). A single, outstanding feature showed a scaled mutual information value greater than 8.2%: the count of psychological disorders.
Fig 5.
Scaled mutual information for all informative feature sets in rank order.
Rank is presented in log10. A) Rank of component feature sets. B) Rank of family feature sets. C) Rank of feature-family combinations.
Table 4.
Evaluation statistics for the five feature sets with the highest scaled mutual information, for each feature-set type.