Table 3 Major variables in the Korean National health examination baseline (KNHEB) cohort database

Cigarette smoking

Smoking status

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

Daily smoking amount for current smoker

(categorical)

O

O

O

O

O

O

O

Daily smoking amount for current smoker (continuous)

O

O

O

O

O

O

O

O

O

O

Smoking duration for current smoker (categorical)

O

O

O

O

O

O

O

Smoking duration for current smoker (continuous)

O

O

O

O

O

O

O

O

O

O

Smoking dose for past smoker

O

O

O

O

O

O

O

O

O

O

Smoking duration for past smoker

O

O

O

O

O

O

O

O

O

O

Year smoking started

O

O

O

O

Year smoking ended

O

O

O

Alcohol consumption

Frequency of alcohol consumption (categorial)

O

O

O

O

O

O

O

Amount of alcohol consumed (categorical)

O

O

O

O

O

O

O

Days of drinking per week

O

O

O

O

O

O

O

O

O

O

Number of drinks per day

O

O

O

O

O

O

O

O

O

O

Physical activity

Days of physical activity per week (categorical)

O

O

O

O

O

O

O

Days of vigorous activity per week

O

O

O

O

O

O

O

O

O

O

Days of moderate activity per week

O

O

O

O

O

O

O

O

O

O

Days of walking per week

O

O

O

O

O

O

O

O

O

O

Obesity

Body mass index

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

Waist circumstance

O

O

O

O

O

O

O

O

O

O

O

Health problems

Hypertension

Systolic blood pressure

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

Diastolic blood pressure

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

Diabetes mellitus

HbA1C

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

Fasting blood glucose

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

Dyslipidemia

Total cholesterol

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

Triglycerides (TG)

O

O

O

O

O

O

O

O

O

O

High-density lipoprotein (HDL)

O

O

O

O

O

O

O

O

O

O

Low-density lipoprotein (LDL)

O

O

O

O

O

O

O

O

O

O

Kidney/urinary disease

Serum creatinine

O

O

O

O

O

O

O

O

O

O

Glomerular filtration rate (GFR)

O

O

O

O

O

O

O

O

Urine glucose

O

O

O

O

O

O

O

Urine protein

Occult haematuria

O

O

O

O

O

O

O

Urine pH

O

O

O

O

O

O

O

Liver disease

Aspartate aminotransferase (AST)

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

Alanine aminotransferase (ALT)

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

Gamma-glutamyl transpeptidase (ϒ-GTP)

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

Antibody to hepatitis B

O

O

O

O

O

O

O

Mental health

Cognitive impairment based on the Korean Dementia Screening Questionnaire-Cognition (KDSQ-C)

O

O

O

O

O

O

O

Stress (categorical)

O

O

O

O

O

O

O

O

O

O

Others

Trauma and aftereffect

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

Death

Vital statistics including dates and cause of deaths (ICD-10 codes)

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

Medical history and family history

Medical history

Presence of a condition (open question): liver disease, hypertension, stroke, heart disease, diabetes mellitus, cancer, etc.

O

O

O

O

O

O

O

Presence of a condition: stroke, heart disease (myocardial infarction/angina), hypertension, diabetes mellitus, dyslipidemia, pulmonary tuberculosis, etc.

O

O

O

O

O

O

O

O

O

O

Year of onset

O

O

O

O

O

O

O

Full recovery or not

O

O

O

O

O

O

O

Drug treatment or not

O

O

O

O

O

O

O

O

O

O

Family history

Family history of disease: liver disease, cancer

O

O

O

O

O

O

O

Family history of disease: hypertension, stroke, heart disease, diabetes mellitus

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

Family history of disease: others (including cancer)

O

O

O

O

O

O

O

O

O

O

Hospital examination

Height

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

Weight

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

Visual acuity

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

Auditory acuity

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

Chest X-ray result

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

EKG result

O

O

O

O

O

O

O

Health facility usage

Date of visit, type of medical institution (clinic/hospital/tertiary hospital/public health centre), type of visit (inpatient/outpatient/emergency/intensive care), length of stay, medical costs (insurer/patient), five diagnostic codes including main diagnosis and sub-diagnosis

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

Socioeconomic and demographic factors

Sex, age, area of residence, insurance type, insurance contributions (proxy for income), type and grade of disability

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O