Demographic information in 2011* for adults with and without intellectual disabilities
| Demographic information* | Intellectual disabilities | Controls | P value† |
| Total, n (person-years) | 14 477 (113 043.63) | 506 207 (4 159 808.6) | |
| Male sex, n (%) | 7927 (54.8) | 238 036 (47.0) | <0.001 |
| Co-occurring autism | |||
| Total, n (%) | 1631 (11.3) | – | |
| Male sex, n (%) | 1017 (7.0) | – | |
| Age at the time of census, n (%) | |||
| 25–34 | 2974 (20.5) | 83 868 (16.6) | <0.001 |
| 35–44 | 3276 (22.6) | 97 881 (19.3) | |
| 45–54 | 3663 (25.3) | 108 048 (21.3) | |
| 55–64 | 2493 (17.2) | 92 693 (18.3) | |
| 65–74 | 1330 (9.2) | 67 519 (13.3) | |
| 75+ | 741 (5.1) | 56 198 (11.1) | |
| SIMD quintile at the time of census, n (%) | |||
| 1 (most deprived) | 4226 (29.2) | 91 378 (18.1) | <0.001 |
| 2 | 3781 (26.1) | 98 114 (19.4) | |
| 3 | 2950 (20.4) | 104 062 (20.6) | |
| 4 | 2209 (15.3) | 108 765 (21.5) | |
| 5 (least deprived) | 1311 (9.1) | 103 888 (20.5) | |
| Deaths, crude rate per 100 000 (CI)‡ | 3033.342 (2933.494 to 3136.588) | 1674.140 (1661.752 to 1686.62) | |
*Data taken from time of census.
†χ2 test for intellectual disabilities compared with control group (for age and SIMD, χ2 test was performed across all categories, overall p value).
‡58 individuals aged 25+ had a record of death which occurred before the date of the census and 13 individuals died on the day of the census; both groups were removed. 51 cases without intellectual disabilities or autism died during the study but had their cause of death recorded as a form of intellectual disability/autism and were subsequently removed from the study.
SIMD, Scottish Index of Multiple Deprivation.