Table 1
Characteristics of cases and matched controls. Values are numbers (percentages) unless stated otherwise
| Characteristic | Cases (n=9218) | Controls (n=86 349) |
|---|---|---|
| Female | 3405 (36.9) | 31 718 (36.7) |
| Male | 5813 (63.1) | 54 631 (63.3) |
| Median (interquartile range) Townsend score | -0.88 (-2.90-2.25) | -1.21 (-3.10-1.82) |
| Median No (interquartile range) of months of prior data | 87 (63-117) | 86 (63-117) |
| Age band (years) | ||
| 25-34 | 28 (0.3) | 263 (0.3) |
| 35-44 | 281 (3.0) | 2800 (3.2) |
| 45-54 | 957 (10.4) | 9468 (11.0) |
| 55-64 | 1812 (19.7) | 17 900 (20.7) |
| 65-74 | 2497 (27.1) | 24 448 (28.3) |
| 75-84 | 2525 (27.4) | 23 801 (27.6) |
| ≥85 | 1118 (12.1) | 7669 (8.9) |
| Body mass index (kg/m2) | ||
| <30 | 5444 (59.1) | 49 593 (57.4) |
| ≥30 | 1593 (17.3) | 11 903 (13.8) |
| Not recorded | 2181 (23.7) | 24 853 (28.8) |
| Smoking status | ||
| Non-smoker | 5457 (59.2) | 52 983 (61.4) |
| Smoker | 2550 (27.7) | 15 709 (18.2) |
| Not recorded | 1211 (13.1) | 17 657 (20.4) |
| Morbidity before index date | ||
| Ischaemic heart disease | 2639 (28.6) | 8216 (9.5) |
| Diabetes | 1225 (13.3) | 6188 (7.2) |
| Hypertension | 3582 (38.9) | 25 841 (29.9) |
| Osteoarthritis | 1593 (17.3) | 12 168 (14.1) |
| Rheumatoid arthritis | 216 (2.3) | 1185 (1.4) |
| Drugs in three years before index date | ||
| Statin | 1787 (19.4) | 8098 (9.4) |
| Tricyclic antidepressant | 1263 (13.7) | 8570 (9.9) |
| Selective serotonin reuptake inhibitor | 832 (9.0) | 5923 (6.9) |
| Aspirin | 3277 (35.6) | 17 693 (20.5) |
