Table 1

Demographic information for children and young people aged 5–24 years at baseline with and without intellectual disabilities

Demographic information*Intellectual disabilitiesControlsP value†
Total, n (person-years)724766 871.403156 4391 466 631.0
Male sex, n (%)446061.577 97949.8<0.001
Age, n (%)
 5–9143519.834 60722.1<0.001
 10–14187925.937 51424.0
 15–19206328.540 99026.2
 20–24187025.8433 32827.7
SIMD quintile, n (%) at time of census
 1 (most deprived)178124.630 86819.7<0.001
 2152221.029 76519.0
 3141719.630 74219.7
 4134318.531 38720.1
 5 (least deprived)118416.333 67721.5
Deaths, n, crude rate per 100 000 (CI)‡260388 (344–439)52836 (33–39)
  • *Data taken from time of census.

  • †X2 test for intellectual disabilities compared with control group. (For SIMD, X2 test (Pearson χ2 test for independence) was performed across all categories, overall p value.)

  • ‡Three individuals had a record of death which occurred before the date of the census so were removed.

  • SIMD, Scottish Index of Multiple Deprivation.