Table 4

Hospital admissions due to diabetes* among pupils with insulin-dependent diabetes, with and without intellectual disabilities, including incidence rates, Cox proportional hazards models for the risk of admission and zero-truncated negative binomial regression for total length of stay

All admissions due to diabetes*	Intellectual disabilities and diabetes†		Controls and diabetes†		P value‡
Total pupils, n	94		3924
Total admissions, n	54		3089
Pupils admitted, n%	24	25.5%	1227	31.3%	=0.235
Males admitted, n%	15	27.3%	532	26.6%	0.908
Females admitted, n%	9	23.1%	695	36.2%	0.092
Mean admissions per person (SD)	2.25	(2.3)	2.52	(3.4)	=0.704
N day cases, % admissions	16	29.6%	545	17.6%	=0.023
Length of stay, days, median (IQR)	2	1,3	3	2,4	=0.031
(Excluding days cases)	3	2,4	3	2,4	=0.371
Incidence of admission/1000 person years (95% CI)	Rate per 1000 (95% CI)		Rate per 1000 (95% CI)
All pupils	96.72	(64.83, 144.30)	95.76	(90.55, 10.27)
Male pupils	102.88	(62.02, 170.65)	79.00	(72.57, 86.01)
Female pupils	87.94	(45.76, 169.01)	114.33	(106.14, 123.16)
Cox PH models	HR (95% CI)
Intellectual disabilities	0.98	(0.65, 1.47)
	aHR§ (95%CI)
	0.94	(0.63, 1.41)
Length of stay models	IRR (95% CI)
All pupils admitted, (n=1251)
Intellectual disabilities	0.70	(0.51, 0.97)
	Adjusted IRR§ (95%)
All pupils admitted (n=1251)
Intellectual disabilities	0.71	(0.51, 0.99)

*ICD 10 codes E10–E14.
†Prescription for insulin.
‡χ² test was used for comparing n pupils admitted, n day cases; t-test was used for mean admissions per person, Mann-Whitney U test was used for length of stay.
§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.