Table 1—

Clinical characteristics of subjects with type 1 diabetes

Onset age ≤7 yearsOnset age >7 yearsP
n2645
Age (years)5.2 ± 4.6 (23, 20–36)29.9 ± 5.6 (30, 20–44)<0.0001
Sex (male:female)13:1324:210.79
Secondary education (years)7.0 ± 2.0 (6, 4–10)7.1 ± 2.5 (6, 4–11)0.82
NART (premorbid intellectual ability)32.8 ± 5.4 (33, 21–41)31.8 ± 6.6 (32, 15–42)0.52
HbA1c (%)8.3 ± 1.18.7 ± 1.30.20
Blood pressure (mmHg)122/72 ± 11/10122/74 ± 14/100.94
Age at diagnosis of type 1 diabetes (years)5.0 ± 2.3 (5.5, 1–7)12.2 ± 2.4 (12, 8–17)<0.0001
Duration of diabetes (years)20.1 ± 5.2 (18.5, 13–31)17.7 ± 5.5 (16, 10–29)0.07
Background retinopathy (% with BDR)23420.10
Severe hypoglycemia
    Median total episodes (% exposed, range)7.0 (77, 0–200)4.0 (69, 0–100)0.48
    Median total coma episodes (% exposed, range)2.0 (65, 0–40)0.0 (49, 0–9)0.26
    Median total seizures (% exposed, range)0.0 (46, 0–30)0.0 (33, 0–6)0.25
  • Data are means ± SD (median, range) unless otherwise noted. The HbA1c nondiabetic range was 5.0–6.5% (by high-performance liquid chromatography). BDR, background diabetic retinopathy.