| Characteristic | Number (%) | Incidence per 100 000 (95% CI) | |
| Age group (years) | 0–4 | 1098 (31) | 4.5 (4.2 to 4.8) |
| 5–9 | 836 (24) | 3.2 (3.0 to 3.4) | |
| 10–14 | 1275 (36) | 4.7 (4.4 to 4.9) | |
| 15 | 354 (10) | 6.4 (4.6 to 8.5) | |
| Ethnicity* | White (420) | 574 (16) | 1.1 (1.0 to 1.2) |
| Black African (828) | 994 (28) | 87.6 (82.2 to 93.2) | |
| Pakistani (544) | 703 (20) | 48.9 (45.5 to 52.7) | |
| Indian (262) | 383 (11) | 29.7 (26.8 to 32.8) | |
| Bangladeshi (120) | 150 (4) | 24.0 (20.3 to 28.2) | |
| Black Caribbean (75) | 109 (3) | 14.1 (11.6 to 17.0) | |
| Other | 408 (12) | ||
| Unknown | 242 (7) | ||
| Gender | Male | 1717 (48) | 4.0 (3.8 to 4.2) |
| Female | 1840 (52) | 4.5 (4.5 to 4.7) | |
| Missing | 6 (0.2) | ||
| UK born | Yes | 2037 (57) | 2.5 (2.4 to 2.7) |
| No | 1107 (31) | 37.3 (35.2 to 39.6) | |
| Unknown | 419 (12) | ||
| Region | East Midlands | 286 (8) | 4.3 (3.8 to 4.8) |
| East of England | 137 (4) | 1.6 (1.3 to 1.9) | |
| London | 1543 (43) | 13.3 (12.7 to 14.0) | |
| North East | 90 (3) | 2.3 (1.8 to 2.8) | |
| North West | 283 (8) | 2.6 (2.3 to 2.9) | |
| South East | 173 (5) | 1.4 (1.2 to 1.6) | |
| South West | 58 (2) | 0.8 (0.6 to 1.0) | |
| Wales | 104 (3) | 2.2 (1.8 to 2.7) | |
| West Midlands | 512 (14) | 5.9 (5.4 to 6.4) | |
| Yorkshire and the Humber | 377 (11) | 4.7 (4.2 to 5.2) | |
| Year of notification | 1999 | 413 (12) | 3.9 (3.5 to 4.3) |
| 2000 | 397 (11) | 3.8 (3.4 to 4.1) | |
| 2001 | 530 (15) | 5.0 (4.6 to 5.5) | |
| 2002 | 450 (13) | 4.3 (3.9 to 4.7) | |
| 2003 | 387 (11) | 3.7 (3.4 to 4.1) | |
| 2004 | 452 (13) | 4.4 (4.0 to 4.8) | |
| 2005 | 502 (14) | 4.9 (4.5 to 5.3) | |
| 2006 | 432 (12) | 4.2 (3.8 to 4.6) | |
| Overall | 3563 (100) | 4.3 (4.1 to 4.4) | |
*Note data are for 2001 to 2006 only (number during that period). Labour Force Survey denominator values prior to 2001 are not comparable due to ethnicity classification change.