Table 3: Clinical characteristics of children.

ASD (N=359) DS (N=145) T1DM (N=155) Significant Between-group Differences *
Duration of Illness From First Diagnosis (mean ± SD) 6.1 ± 3.6 10.3 ±3.9 6.2 ± 3.2 DS > ASD and T1DM (p<0.001)
Current Treatment [N, (%)]
Pharmacotherapy 85 (23.7) 27 (18.6) 155 (100.0) not tested
Psychomotor Interventions 158 (44.0) 66 (45.5) 0 (0.0) not tested
Speech therapy 184 (51.3) 94 (64.8) 0 (0.0) not tested
Psychoeducation 132 (36.8) 31 (21.4) 1 (0.6) not tested
Occupational therapy 22 (6.1) 5 (3.4) 0 (0.0) not tested
Cognitive behavioural therapy 23 (6.4) 2 (1.4) 2 (1.3) not tested
Family therapy 18 (5.0) 1 (0.7) 1 (0.6) not tested
Alternative and complementary therapies 75 (20.9) 7 (4.8) 0 (0.0) not tested
CGI-S (mean ± SD) 4.2 ± 1.2 3.8 ± 0.8 3.2 ± 1.6 ASD > DS > T1DM (all p<0.001)
Intellectual disability [N, (%)]
Absent 92 (25.6) 1 (0.7) 155 (100.0) T1DM > ASD > DS (all p<0.001)
Mild 94 (26.2) 52 (35.9) 0 (0.0) ASD and DS > T1DM (p<0.001)
Moderate 107 (29.8) 75 (51.7) 0 (0.0) DS > ASD > T1DM (all p<0.001)
Severe 50 (13.9) 14 (9.7) 0 (0.0) ASD and DS > T1DM (p<0.001)
Profound 15 (4.2) 3 (2.1) 0 (0.0) ASD > T1DM (p<0.05)
CARS (mean ± SD) 36.5 ± 6.6 22.8 ± 4.2 ASD > DS (p<0.001)
ADOS Communication (mean ± SD) 5.8 ± 2.0 - -
ADOS Social (mean ± SD) 9.7 ± 2.8 - -
CGAS (mean ± SD) 45.5 ± 15.3 55.7 ± 13.1 89.9 ± 5.0 ASD > DS > T1DM (all p<0.001)
VABS age-equivalent scores (months)
Communication (mean ± SD) 51.2 ± 37.5 55.8 ± 29.9 132.3 ± 32.7 ASD < DS < T1DM (all p<0.001)
Daily living skills (mean ± SD) 49.6 ± 29.5 54.3 ± 25.5 144.44 ± 7.0 ASD < DS < T1DM (all p<0.001)
Socialization (mean ± SD) 34.2 ± 22.6 51.1 ± 24.7 149.0 ± 51.2 ASD < DS < T1DM (all p<0.001)
Motor skills (mean ± SD) 47.2 ± 14.0 42.6 ± 13.2 62.9 ± 5.4 DS < ASD (p<0.05) < T1DM (p<0.001)

ASD = Autism Spectrum Disorder; DS = Down’s syndrome; T1DM = Type 1 diabetes mellitus; CGI-S = Clinical Global Impression-Severity; ADOS = Autism Diagnostic Observation Schedule; CGAS = Children’s Global Assessment Scale; VABS = Vineland Adaptive Behavioural Scale.
Numbers may not sum to total due to missing data. Percentages are calculated as percentage of both available and missing data.
* after adjustment for age and sex