Table 2.
Standardised mortality ratios
| Variable | Groups | SMR (95% CI) |
| All participants | – | 2.24 (1.99 to 2.50) |
| Age group* | 15–25 years | 18.73 (0.37 to 37.09) |
| 26–35 years | 4.21 (1.29 to 7.13) | |
| 36–45 years | 3.86 (2.28 to 5.44) | |
| 46–55 years | 3.77 (2.90 to 4.74) | |
| >55 years | 1.86 (1.60 to 2.12) | |
| Sex | Male | 1.69 (1.42 to 1.95) |
| Female | 3.48 (2.90 to 4.06) | |
| Ability level | Mild ID | 1.60 (1.27 to 1.92) |
| Moderate ID | 2.10 (1.62 to 2.58) | |
| Severe ID | 2.78 (2.11 to 3.44) | |
| Profound ID | 4.14 (3.11 to 5.17) | |
| Down syndrome | No | 1.93 (1.68 to 2.18) |
| Yes | 5.28 (3.98 to 6.57) | |
| Underlying causes of death grouped by ICD-10 chapter† | Congenital malformations, deformations and chromosomal abnormalities | 17.26 (10.75 to 23.78) |
| Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism | 7.50 (-7.20 to 22.20) | |
| Diseases of the circulatory system | 5.55 (4.01 to 7.09) | |
| Diseases of the digestive system | 16.13 (8.23 to 24.04) | |
| Diseases of the genitourinary system | 3.65 (0.73 to 6.57) | |
| Diseases of the musculoskeletal system and connective tissue | 5.40 (-0.71 to 11.52) | |
| Diseases of the nervous system | 7.73 (5.13 to 10.32) | |
| Diseases of the respiratory system | 6.78 (5.02 to 8.54) | |
| Diseases of the skin and subcutaneous tissue | 2.75 (−2.64 to 8.15) | |
| Endocrine, nutritional and metabolic diseases | 3.43 (1.05 to 5.81) | |
| External causes of morbidity and mobility | 11.08 (3.40 to 18.76) | |
| Infectious and parasitic diseases | 8.93 (1.78 to 16.07) | |
| Mental and behavioural disorders | 12.64 (3.27 to 22.00) | |
| Neoplasms | 6.31 (4.19 to 8.43) | |
| Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified | 19.51 (0.39 to 38.63) |
*Data used for comparison with General Population (GG&C Health Board) provide data in 5-year age bands therefore 15+. Data on adults with ID are 16+.
†Negative Lower CI and wide CIs indicate low number of observed deaths in study population.
ICD-10, International Statistical Classification of Diseases and Related Health Problems, 10th Revision; ID, intellectual disabilities; SMR, standardised mortality ratios.