Table 2

Hospital admissions due to epilepsy, status epilepticus or seizures* among pupils with epilepsy, with and without intellectual disabilities, including IRRs, Cox proportional hazards models for risk of admission and zero-truncated negative binomial regression for total length of stay

All acute admissions due to epilepsy*Intellectual disabilities and epilepsy†Controls and epilepsy†P value‡
Total pupils, n16086441
Total admissions, n11341256
Pupils admitted, n%39524.6%5819.0%<0.001
Males admitted, n%23024.2%28510.9%<0.001
Females admitted, n%16525.1%2967.7%<0.001
Mean admissions per person (SD)2.87(4.7)2.16(2.5)=0.003
N day cases, % admissions40135.4%38931.0%=0.023
Length of stay, days, median (IQR)2(1, 3)2(1, 3)<0.444
(excluding days cases)3(2, 4)2(2, 4)<0.028
Incidence of admission/1000 person years (95% CI) Rate per 1000 (95% CI) Rate per 1000 (95% CI)
 All pupils79.67(72.19, 87.93)32.40(29.87, 35.14)
 Males79.57(69.92, 90.54)36.91(32.86, 41.45)
 Females79.82(68.53, 92.98)28.99(25.87, 32.49)
Cox PH models HR (95% CI)
 Intellectual disabilities2.55(2.25, 2.90)
aHR§ (95% CI)
 Intellectual disabilities2.24(1.97, 2.55)
Length of stay models IRR (95% CI)
 All pupils admitted (n=2390)
  Intellectual disabilities1.28(0.84, 1.94)
Adjusted IRR§ (95% CI)
 All pupils admitted (n=2390)
  Intellectual disabilities1.32(0.92, 1.89)
  • t-test was used for mean admissions per person, Mann-Whitney U test was used for length of stay.

  • *ICD 10 codes G40, G41, R568.

  • †Pupils with anti-epileptic drug prescription.

  • ‡χ2 test was used for comparing n pupils admitted, n day cases.

  • §Adjusted for age at entry, sex and deprivation quintile Scottish Index of Multiple Deprivation.

  • aHR, adjusted Hazard Ratio; ICD, International Classification of Diseases; IRR, incidence rate ratio.