Table 1.
Cohort characteristics for young people with learning disabilities or autism spectrum disorders (overall and in cohorts with complete information on all risk factors).
| Risk factors | Young people with learning disability | Autistic young people (with no recorded learning disabilities) | ||
|---|---|---|---|---|
| Total | Whole cohort n = 51,291 | Complete case n = 49,155 (96%) | Whole cohort n = 46,270 | Complete case n = 45,743 (99%) |
| Sex | ||||
| Male | 27,694 (54%) | 26,826 (55%) | 34,283 (74%) | 33,911 (74%) |
| Female | 23,169 (45%) | 22,329 (45%) | 11,902 (26%) | 11,832 (26%) |
| Missing | 428 (1%) | 85 (0.2%) | ||
| IMD Quintile | ||||
| Q1: most deprived | 14,260 (28%) | 14,122 (29%) | 11,477 (25%) | 11,467 (25%) |
| Q2 | 10,510 (20%) | 10,399 (21%) | 9994 (22%) | 9957 (22%) |
| Q3 | 9011 (18%) | 8956 (18%) | 8881 (19%) | 8859 (19%) |
| Q4 | 8166 (16%) | 8098 (16%) | 7842 (17%) | 7833 (17%) |
| Q5: least deprived | 7631 (15%) | 7580 (15%) | 7634 (16%) | 7627 (17%) |
| Missing | 1713 (3%) | 442 (1%) | ||
| Presence of different groups of chronic conditions (out of 7 categories) | ||||
| None | 14,565 (28%) | 13,280 (27%) | 23,578 (51%) | 23,220 (51%) |
| 1 | 13,666 (27%) | 13,019 (26%) | 13,935 (30%) | 13,807 (30%) |
| 2 | 9747 (19%) | 9590 (20%) | 5785 (13%) | 5751 (13%) |
| 3+ | 13,313 (26%) | 13,266 (27%) | 2972 (6%) | 2965 (6%) |
| Year of birth | ||||
| 1998–2001 | 20,358 (40%) | 18,864 (38%) | 19,494 (42%) | 19,158 (42%) |
| 1994–1997 | 16,913 (33%) | 16,586 (34%) | 16,765 (36%) | 16,637 (36%) |
| 1990–1993 | 14,020 (27%) | 13,705 (28%) | 10,011 (22%) | 9948 (22%) |
IMD = Index of Multiple Deprivation.