Variable | Category | Cases n (%) | Controls n (%) |
---|---|---|---|
 |  | n = 62,019 | n = 276,580 |
Length of exposure period (years): median (IQR) | Â | 8.1 (5.5, 11.0) | 8.1 (5.5, 11.0) |
Year of diagnosis/index date: median (IQR) | Â | 2005 (2002, 2007) | 2005 (2002, 2007) |
Age at diagnosis/index date (years) | 0–39 | 1983 (3.2%) | 12,004 (4.3%) |
 | 40–59 | 15,087 (24.3%) | 86,385 (31.2%) |
 | 60–79 | 35,294 (56.9%) | 143,628 (51.9%) |
 | 80 + | 9655 (15.6%) | 34,563 (12.5%) |
Deprivation quintile | 1 (least deprived) | 3911 (6.3%) | 17,535 (6.3%) |
 | 2 | 12,427 (20.0%) | 55,723 (20.1%) |
 | 3 | 5811 (9.4%) | 26,166 (9.5%) |
 | 4 | 15,518 (25.0%) | 68,902 (24.9%) |
 | 5 (most deprived) | 16,558 (26.7%) | 73,319 (26.5%) |
 | Missing | 117 (0.0%) | 529 (0.19%) |
Gender | Male | 29,653 (47.8%) | 128,988 (46.6%) |
 | Female | 32,366 (52.2%) | 147,592 (53.4%) |
Smoking status* | Never smoked | 20,982 (33.8%) | 105,499 (38.1%) |
 | Ex-smoker | 12,792 (20.6%) | 50,731 (18.3%) |
 | Current smoker | 15,877 (25.6%) | 57,734 (20.9%) |
 | Missing | 12,368 (19.9%) | 62,616 (22.6%) |
Alcohol consumption* | Non-drinker | 9451 (15.2%) | 40,117 (14.5%) |
 | Light/moderate | 30,759 (49.6%) | 135,074 (48.8%) |
 | Heavy drinker | 2799 (4.5%) | 10,225 (3.7%) |
 | Missing | 19,010 (30.7%) | 91,164 (33.0%) |
Comorbidities diagnosed prior to or during the exposure period | |||
 Diabetes |  | 5428 (8.8%) | 20,750 (7.5%) |
 Myocardial infarction |  | 4001 (6.5%) | 15,045 (5.6%) |
 Coronary heart disease |  | 9984 (16.1%) | 37,739 (13.6%) |
 Heart failure |  | 2155 (3.5%) | 7625 (2.8%) |
 Peripheral vascular disease |  | 3225 (5.2%) | 10,475 (3.8%) |
 Dementia |  | 516 (0.8%) | 3353 (1.2%) |
 Cerebrovascular disease |  | 4372 (7.2%) | 16,875 (6.1%) |
 Chronic obstructive pulmonary disease |  | 6498 (10.4%) | 19,155 (6.9%) |
 Osteoporosis |  | 1866 (3.0%) | 7421 (2.7%) |
 Rheumatology |  | 1578 (2.5%) | 6268 (2.3%) |
 Renal disease |  | 2513 (4.1%) | 8719 (3.2%) |
 Liver disease |  | 683 (1.1%) | 1973 (0.7%) |
 Irritable bowel disease |  | 3533 (5.7%) | 15,360 (5.6%) |
 Human immunodeficiency virus |  | 17 (0.0%) | 41 (0.0%) |
 Hemiplegia/paraplegia |  | 307 (0.5%) | 1324 (0.5%) |