Table 2 Patient characteristic of cases and matched controls
Cases | Controls | |||
|---|---|---|---|---|
N | % | N | % | |
Total study population | 224 | 2,193 | ||
History prior to index date | ||||
Between 1 and 2 years | 30 | 13.4 | 289 | 13.2 |
Between 2 and 3 years | 27 | 12.1 | 270 | 12.3 |
Between 3 and 4 years | 7 | 3.1 | 70 | 3.2 |
Between 4 and 5 years | 15 | 6.7 | 150 | 6.8 |
More than 5 years | 145 | 64.7 | 1,414 | 64.5 |
Gender | ||||
Male | 198 | 88.4 | 1,933 | 88.1 |
Female | 26 | 11.6 | 260 | 11.9 |
Age at index date | ||||
18 to 39 years | 80 | 35.7 | 788 | 35.9 |
40 to 49 years | 97 | 43.3 | 946 | 43.1 |
50 to 59 years | 32 | 14.3 | 309 | 14.1 |
60 years and older | 15 | 6.7 | 150 | 6.8 |
Urbanisation level | ||||
very high (>2,500 addresses per km2) | 76 | 33.9 | 633 | 28.9 |
high (1,500 - 2,500 addresses per km2) | 49 | 21.9 | 522 | 23.8 |
medium (1,000 - 1,500 addresses per km2) | 21 | 9.4 | 252 | 11.5 |
low (500 - 1,000 addresses per km2) | 9 | 4.0 | 113 | 5.2 |
not urban/rural (<500 addresses per km2) | 4 | 1.8 | 61 | 2.8 |
Missing | 65 | 29.0 | 612 | 27.9 |
Socially deprived area (on 4-digit postal code area) a | ||||
Yes | 26 | 11.6 | 226 | 10.3 |
No | 198 | 88.4 | 1,967 | 89.7 |