Variable | Levels (for categorical) | n | % |
Median age, years (IQR) | 62.3 | (57.3–66.0) | |
Age group, years | 40–49 | 7717 | 7.8 |
50–59 | 27 823 | 28.0 | |
60–69 | 63 928 | 64.3 | |
Gender | Female | 45 607 | 45.9 |
Male | 53 861 | 54.1 | |
Ethnic group | White | 92 385 | 92.9 |
Black | 2362 | 2.4 | |
S.Asian | 2118 | 2.1 | |
Mixed | 458 | 0.5 | |
Other | 1641 | 1.6 | |
Unanswered | 504 | 0.5 | |
Household income, GBP | Greater than 100 000 | 2529 | 2.5 |
52 000 to 1 00 000 | 11 039 | 11.1 | |
31 000 to 51 999 | 18 368 | 18.5 | |
18 000 to 30 999 | 23 956 | 24.1 | |
Less than 18 000 | 26 443 | 26.6 | |
Do not know | 5353 | 5.4 | |
Unanswered | 11 780 | 11.8 | |
Occupation category* | Professional and administrative | 33 464 | 33.6 |
Skilled trades | 4232 | 4.3 | |
Services | 5078 | 5.1 | |
Manual and industrial | 6443 | 6.5 | |
Other employment | 3118 | 3.1 | |
Retired | 37 081 | 37.3 | |
Unable to work because of sickness or disability | 5304 | 5.3 | |
Unemployed/unanswered | 4748 | 4.8 | |
Highest level of education (ISCED)† | 5: Tertiary | 38 924 | 39.1 |
4: Post-secondary non-tertiary | 12 224 | 12.3 | |
2–3: Secondary | 20 635 | 20.7 | |
1: Primary | 25 606 | 25.7 | |
Unanswered | 2079 | 2.1 | |
UK country of residence‡ | England | 88 122 | 88.6 |
Scotland | 7109 | 7.1 | |
Wales | 4237 | 4.3 | |
BMI (categorical)§ | Underweight | 197 | 0.2 |
Normal (ref) | 17 206 | 17.3 | |
Overweight | 41 574 | 41.8 | |
Obese | 39 887 | 40.1 | |
Unanswered | 604 | 0.6 | |
Smoking status | Never | 48 974 | 49.2 |
Previous | 40 595 | 40.8 | |
Current | 9254 | 9.3 | |
Unanswered | 645 | 0.6 | |
Median reported duration of hypertension, years (IQR) | 7.3 | (3.6–12.6) | |
No of antihypertensive medications | 1 | 48 501 | 48.8 |
2 | 33 678 | 33.9 | |
≥3 | 13 836 | 13.9 | |
Medication list unavailable | 3453 | 3.5 | |
Cardiovascular disease | No | 80 124 | 80.6 |
Yes | 19 344 | 19.4 | |
Diabetes | No | 84 040 | 84.5 |
Yes | 15 428 | 15.5 | |
No of comorbidities¶ | 0 | 44 968 | 45.2 |
1 | 36 901 | 37.1 | |
2 | 13 583 | 13.7 | |
≥3 | 4016 | 4.0 |
*Occupation categories have been condensed from those recorded in UKB. Professional and administrative: managers and senior officials, professional occupations, associate professional and technical occupations, administrative and secretarial occupations. Skilled trades: skilled trades occupations. Services: personal service occupations, sales and customer service occupations. Manual and industrial: process, pPlant and machine operatives, elementary occupations. Other employment: free text entry that was not coded by UKB.
†Self-reported highest education achieved was mapped to the ISCED categories.
‡The assessment centre the participant attended was used as a proxy for country of residence.
§BMI has been categorised as: underweight <18.5 kg/m2; normal 18.5–24.9 kg/m2; overweight 25.0–29.9 kg/m2; obese ≥30.0 kg/m2.
¶The conditions that counted towards the number of comorbidities were: cardiovascular disease, diabetes, arrhythmia (afib/flutter), asthma or COPD, migraines, epilepsy, anxiety, depression, osteoarthritis, other joint disorder.
BMI, body mass index; COPD, chronic obstructive pulmonary disease; ISCED, International Standard Classification of Education; UKB, UK Biobank.