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Table 1 General variables for this study

From: Development and validation of personalised risk prediction models for early detection and diagnosis of primary liver cancer among the English primary care population using the QResearch® database: research protocol and statistical analysis plan

Data source

Categories

Variables

GP record

Demographics

Age, sex, ethnicity, socioeconomic deprivation (Townsend quintile), geographical regions in England

 

Lifestyle

Body mass index (BMI, continuous variable), smoking and drinking status and intensity (with units)—longitudinal data available for all variables

HES

 

Diagnoses and treatments in the outpatient appointments and hospital admissions

Cancer registry (PHE)

 

Date of liver cancer diagnosis, route to diagnosis, stage at diagnosis, cancer grade and histology

HES

Treatments

Surgical resection of liver, liver transplantation, ablation of liver, transarterial chemoembolization (TACE), transarterial radioembolization (TARE)—OPCS codes

ONS death

 

Date of death, all causes of death (up to 15)

  1. HES hospital episode statistics, ONS Office for National Statistics, PHE Public Health England