By ICD-10 chapter, the underlying causes of death as well as all-contributing factors in death, and cause-specific crude mortality rates per 100 000 person-years for pupils with and without intellectual disabilities
| ICD-10 chapter* | Underlying cause of death | All-contributing factors in death | ||||||||||
| Intellectual disabilities | Controls | Intellectual disabilities | Controls | |||||||||
| n (%) | CMR | 95% CI | n (%) | CMR | 95% CI | n | CMR | 95% CI | n | CMR | 95% CI | |
| Ch. 6. Diseases of the nervous system | 35 (33%) | 51.9 | 37.3 to 72.4 | 19 (4%) | 0.5U | 0.3 to 0.8 | 56 | 83.2 | 64.0 to 108.1 | 39 | 1.1 | 0.8 to 1.5 |
| Ch. 17. Congenital malformations, deformations and chromosomal abnormalities | 23 (22%) | 34.2 | 22.7 to 51.4 | 13 (3%) | 0.4U | 0.2 to 0.6 | 32 | 47.5 | 33.6 to 67.2 | 18 | 0.5U | 0.3 to 0.8 |
| Ch. 4. Endocrine, nutritional and metabolic diseases | 9 (8%) | 15 (3%) | 0.4U | 0.2 to 0.7 | 11 | 16.3U | 9.0 to 29.5 | 18 | 0.5U | 0.3 to 0.8 | ||
| Ch. 10. Diseases of the respiratory system | 8 (8%) | 17 (4%) | 0.5U | 0.3 to 0.7 | 55 | 81.7 | 62.7 to 106.4 | 51 | 1.4 | 1.1 to 1.8 | ||
| Ch. 2. Neoplasms | 7 (7%) | 92 (20%) | 2.5 | 2.0 to 3.1 | 8 | NA | 94 | 2.6 | 2.1 to 3.1 | |||
| Ch. 20. External causes of morbidity and mortality | 5 (5%) | 210 (46%) | 5.7 | 5.0 to 6.6 | 16 | 23.8U | 14.6 to 38.8 | 231 | 6.3 | 5.5 to 7.2 | ||
| Ch. 9. Diseases of the circulatory system | <5 (5%) | 24 (5%) | 0.7 | 0.4 to 1.0 | 15 | 22.3U | 13.4 to 37.0 | 54 | 1.5 | 1.1 to 1.9 | ||
| Ch. 11. Diseases of the digestive system | <5 (5%) | 6 (1%) | 13 | 19.3U | 11.2 to 33.3 | 11 | 0.3U | 0.2 to 0.5 | ||||
| Ch. 1. Certain infectious and parasite diseases | <5 (5%) | 12 (3%) | 0.3 | 0.2 to 0.6 | 8 | 29 | 0.8 | 0.5 to 1.1 | ||||
| Ch. 5. Mental and behavioural disorders | <5 (5%) | <5 (1%) | 6 | 17 | 0.5U | 0.3 to 0.7 | ||||||
| Ch. 3. Diseases of the blood, blood-forming organs and immune mechanism | <5 (5%) | <5 (1%) | <5 | 8 | ||||||||
| Ch.14. Diseases of the genitourinary system | <5 (5%) | <5 (1%) | <5 | <5 | ||||||||
| Ch. 13. Diseases of the musculoskeletal system and connective tissue | 0 | <5 (1%) | <5 | 7 | ||||||||
| Ch. 8. Diseases of the ear and mastoid process | <5 (5%) | 0 | <5 | 0 | ||||||||
| Ch. 15. Pregnancy, childbirth and puerperium | 0 | <5 (1%) | 0 | <5 | ||||||||
| Ch. 18. Symptoms, signs and abnormal clinical and laboratory findings | NA | NA | 28 | 76 | ||||||||
| Ch.19. Injury, poisoning and certain other consequences of external causes | NA | NA | 10 | 219 | ||||||||
| Unknown cause or error in underlying code | 5 (5%) | 39 (9%) | NA | NA | ||||||||
| TOTAL | 106 | 458 | NA | NA | ||||||||
U rates based on 10 to 20 deaths labelled ‘U’ for unreliable.
*n <5 repressed due to statistical disclosure.
CMR, crude mortality rate - reported for ≥10 deaths; ICD-10, International Classification of Diseases, tenth revision.