Demographic information for pupils with and without intellectual disabilities
| Demographic information* | Intellectual disabilities | Controls | P value† | ||
| Total, n (person-years) | 18 278 | (67 342) | 777 912 | (3 672 224) | |
| Male sex, n (%) | 11 891 | (65%) | 389 160 | (50%) | p<0.001 |
| Age, person-years (%) | |||||
| <10 | 12 518 | (19%) | 995 297 | (27%) | |
| 10 to 14 | 28 297 | (42%) | 1 332 123 | (36%) | |
| 15 to 19 | 23 672 | (35%) | 1 178 608 | (32%) | |
| 19 to 24 | 2855 | (4%) | 166 196 | (5%) | |
| Disability adaptations, n (%) | |||||
| Physical adaptation, ever received | 1971 | (11%) | 1837 | (0.2%) | p<0.001 |
| Curriculum adaptation, ever received | 6623 | (36%) | 6341 | (0.8%) | p<0.001 |
| Communication adaptation, ever received | 3553 | (19%) | 1760 | (0.2%) | p<0.001 |
| SIMD quintile, n (%) at first census | |||||
| 1 (most deprived) | 5822 | (32%) | 169 038 | (22%) | |
| 2 | 3888 | (21%) | 149 290 | (19%) | |
| 3 | 3397 | (19%) | 152 415 | (20%) | |
| 4 | 2896 | (16%) | 158 228 | (20%) | |
| 5 (least deprived) | 2275 | (12%) | 148 941 | (19%) | p<0.001 |
| Ethnicity, n (%) | |||||
| White‡ | 16 553 | (91%) | 708 941 | (91%) | p<0.001 |
| Asian‡ | 514 | (3%) | 23 791 | (3%) | |
| Mixed or multiple ethnicities | 144 | (1%) | 8035 | (1%) | |
| African, Caribbean or black | 87 | (<1%) | 4710 | (<1%) | |
| Other ethnic groups | 92 | (<1%) | 4665 | (<1%) | |
| Not disclosed / or unknown | 888 | (5%) | 27 770 | (4%) | |
*Data taken from first census record, except for disability adaptation, which includes any record across census years.
†χ2 test for intellectual disabilities compared with control group (For SIMD, χ2 test was performed across all categories, overall p value).
‡(White: Scottish, British and other) (Asian: Indian/British/Scottish, Pakistani/British/Scottish, Bangladeshi/British/Scottish, and Chinese/British/Scottish).
SIMD, Scottish Index of Multiple Deprivation.