Baseline characteristics of individuals included in risk estimation by version 2 of the QRISK cardiovascular disease risk algorithm (QRISK2)*
| Characteristics† | Dataset for QRISK2 estimation (n=1 046 736) | |
| Men (n=498 687, 47.6%) | Women (n=548 049, 52.4%) | |
| Mean (SD) age at baseline (years) | 55.2 (11.1) | 57.0 (12.1) |
| Mean (SD) systolic blood pressure (mm Hg) | 134.7 (15.5) | 131.6 (17.1) |
| Mean (SD) total cholesterol (mmol/L) | 5.5 (1.1) | 5.6 (1.1) |
| Mean (SD) high density lipoprotein cholesterol (mmol/L) | 1.4 (0.4) | 1.7 (0.4) |
| Mean (SD) total to high density lipoprotein cholesterol ratio | 4.3 (1.3) | 3.6 (1.1) |
| Mean (SD) body mass index | 27.5 (4.7) | 27.1 (5.8) |
| Current or ever smoker | 217 233 (43.6) | 232 116 (42.4) |
| Ethnic group: | ||
| White/not recorded | 490 492 (98.4) | 537 384 (98.1) |
| Indian | 1845 (0.4) | 2556 (0.5) |
| Pakistani | 598 (0.1) | 682 (0.1) |
| Chinese | 396 (0.1) | 591 (0.1) |
| Bangladeshi | 183 (<0.1) | 143 (<0.1) |
| Other Asian | 795 (0.2) | 1158 (0.2) |
| Black Caribbean | 1171 (0.2) | 1661 (0.3) |
| Black African | 891 (0.2) | 1076 (0.2) |
| Other | 2316 (0.5) | 2798 (0.5) |
| Prescription for antihypertensive drugs | 89 336 (17.9) | 156 893 (28.6) |
| Chronic renal disease | 720 (0.1) | 946 (0.2) |
| Atrial fibrillation | 6687 (1.3) | 5696 (1.0) |
| Rheumatoid arthritis | 3396 (0.7) | 9157 (1.7) |
| Family history of coronary heart disease | 15 606 (3.1) | 21 845 (4.0) |
Data are number (%) unless stated otherwise.
*Variables for age, sex, ethnic group, smoking status, systolic blood pressure, treatment for hypertension, total to high density lipoprotein cholesterol ratio, body mass index, diabetes status, chronic renal disease status, atrial fibrillation, rheumatoid arthritis, Townsend deprivation score (not shown), and family history of cardiovascular disease were used in QRISK2 risk estimation.
†Values for systolic blood pressure, total cholesterol, high density lipoprotein cholesterol, body mass index, and smoking status were estimated based on the pooled results from five imputed datasets.
SD, standard deviation.