Table 1.
Crude incidence rates and adjusted rate ratios for first ever eating disorder diagnosis derived from Poisson regression analysis
| First ever incidence | |||
| Individuals (n, %) | Crude incidence rate* (95% CI) |
Incidence rate ratio† (95% CI) |
|
| Sex | |||
| Male | 439 (9.2) | 17.7 (16.1 to 19.4) | - |
| Female | 4336 (90.8) | 189.2 (183.7 to 195) | 10.8 (9.7 to 12.0) |
| Age | |||
| 11 to 15 | 1425 (29.8) | 80.2 (76.1 to 84.5) | 0.6 (0.5 to 0.6) |
| 16 to 20 | 2348 (49.2) | 141.0 (135.4 to 146.9) | - |
| 21 to 24 | 1002 (21.0) | 75.3 (70.7 to 80.1) | 0.5 (0.5 to 0.6) |
| Deprivation | |||
| 1 (least) | 1203 (25.2) | 115.8 (109.3 to 122.5) | 1.5 (1.4 to 1.7) |
| 2 | 1044 (21.9) | 105.2 (98.9 to 111.8) | 1.4 (1.2 to 1.5) |
| 3 | 884 (18.5) | 97.5 (91.2 to 104.2) | 1.2 (1.1 to 1.4) |
| 4 | 953 (20.0) | 97.8 (91.7 to 104.2) | 1.2 (1.1 to 1.4) |
| 5 (most) | 691 (14.5) | 80.3 (74.4 to 86.5) | - |
| Year | |||
| 2004 | 475 (9.9) | 117.5 (107.1 to 128.5) | - |
| 2005 | 462 (9.7) | 107.6 (98 to 117.9) | 0.9 (0.8 to 1.0) |
| 2006 | 491 (10.3) | 110.7 (101.1 to 120.9) | 0.9 (0.8 to 1.1) |
| 2007 | 526 (11.0) | 114.4 (104.9 to 124.6) | 1.0 (0.9 to 1.1) |
| 2008 | 499 (10.5) | 106.8 (97.7 to 116.6) | 0.9 (0.8 to 1.0) |
| 2009 | 478 (10.0) | 101.3 (92.4 to 110.8) | 0.8 (0.8 to 1.0) |
| 2010 | 408 (8.5) | 87.3 (79.1 to 96.3) | 0.7 (0.6 to 0.8) |
| 2011 | 419 (8.8) | 92.6 (83.9 to 101.9) | 0.7 (0.6 to 0.9) |
| 2012 | 394 (8.3) | 89.6 (81 to 98.9) | 0.7 (0.7 to 0.8) |
| 2013 | 357 (7.5) | 88.9 (79.9 to 98.6) | 0.7 (0.6 to 0.9) |
| 2014 | 266 (5.6) | 79.3 (70 to 89.4) | 0.6 (0.5 to 0.8) |
Total study Population=1 135 038 individuals.
*Per 100 000 person years.
†Adjusted for calendar year, sex, age group and deprivation 1(least).