This codelist was developed to identify patients receiving a thyroid-stimulating hormone (TSH) test

This codelist was developed to identify patients receiving a thyroid-stimulating hormone (TSH) test, with a numerical value.

Codes that indicate incident or history of transient ischaemic attack. This codelist include definite and probable transient ischaemic attack. Future studies which require codes denoting definite transient ischaemic attack need to derive another codelist.

This is a codelist of ICD-10 codes for TIA.

Codes that indicate an episode of transverse myelitis

This code list contains codes from the NHS dictionary of medicines and devices (dm+d) that are known as Tricyclic Antidepressants. All formulations of these medicines have been included, except for those that are presented in a combined formulation with other drugs. All tricyclic antidepressants are licensed for the treatment of depression and some of them are licensed for the treatment of anxiety disorders. Certain tricyclic antidepressants are licensed for unusual psychiatric conditions e.g. …

Codes explicitly indicating Type 1 Diabetes

Codes explicity indicating Type 1 Diabetes (secondary care)

Codes explicitly indicating Type 2 Diabetes

VTE codes classified into cvt, dvt, pe, hepatic, smv, unspecified and other.

Codes indicating incident/ history of valvular atrial fibrillation (codes indicating artificial valves and mitral stenosis).

DEFINITION: A history of venous thromboembolic disease

Variables:
(1) a binary variable denoting the presence of one of the codes at any point in the patient record.

ICD-10 codelist for any history of venous thromboembolism.

This differs from the [existing OpenSAFELY codelist incident VTE](https://codelists.opensafely.org/codelist/opensafely/incident-venous-thromboembolic-disease/2020-09-30/) by including codes that specify the event occured during pregnancy or post partum, and post thrombotic syndrome, and by further clarifying type (site) of VTE.

This codelist aims to identify formulations of oral colecalciferol or ergocalciferol that are not in combination with any other active ingredient.