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.

Codes which indicate that vitamin D deficiency exists.

Codes which indicate that vitamin D insufficiency exists.

Codelist created by Liang-Yu Lin using the SNOMED - BNF mapping tool provided by NHS for publication '"The Association between Vitamin D and Incident Herpes Zoster: A UK Biobank Study"

https://github.com/liang-yu12/ukb_vd_hz_publish/blob/376501dfbb670fe351337480024539fb0dd06877/code_lists/exposure_vitd_drug/vitd_drug_dmd.csv

A SNOMED CT codelist to identify people who have received a blood test to assess vitamin D deficiency status.

This codelist aims to identify formulations of oral colecalciferol or ergocalciferol that are in combination with other active ingredients supporting bone health (e.g. calcium or a bisphosphonate).

This is a codelist to identify all warfarin preparations in the [NHS dictionary of medicines and devices](https://ebmdatalab.net/what-is-the-dmd-the-nhs-dictionary-of-medicines-and-devices/).

Returns body weight measurements.

CTV3 (READ V3) codelist for Worms

All products containing zoledronic acid.

CTV3 codelist for chronic inflammatory demyelinating polyneuropathy (no corresponding ICD-10 codes found)

Codes for type 1 and type 2 diabetes.