Table 1.
Baseline Patient Characteristics
| Cohort 1 (1997–1998) N=299 | Cohort 2 (2002–2003) N=152 | p | |
|---|---|---|---|
| Age at entry (yrs) | 11.9 (2.5) | 12.9 (2.3) | <0.001 |
| Gender (% male) | 44% | 43% | 0.89 |
| Ethnicity (% Caucasian) | 92% | 90% | 0.52 |
| Developmental stage (%) | <0.001 | ||
| Prepubertal (Tanner stage I) | 41% | 21% | |
| Pubertal (Tanner stage II–IV) | 36% | 47% | |
| Postpubertal (Tanner stage V) | 23% | 32% | |
| Socioeconomic status (%)a | 0.32 | ||
| Major professional | 22% | 20% | |
| Minor professionals/skilled worker | 54% | 63% | |
| Semi-skilled worker | 17% | 14% | |
| Unskilled/unemployed/retired/student | 7% | 4% | |
| Family structure (% two-parent family) | 82% | 81% | 0.83 |
| BMI (kg/m2) | 21.1 (3.8) | 21.5 (3.8) | 0.19 |
| z-BMI | 0.72 (0.76) | 0.75 (0.73) | 0.50 |
| Duration of T1DM (yrs) | 5.2 (3.0) | 6.2 (3.5) | 0.001 |
| Insulin analog usage (%) | 45% | 82% | <0.001 |
| A1c (%) | 8.7 (1.4) | 8.4 (1.4) | 0.05 |
| A1c ≤ 8% (% of patients) | 32% | 48% | <0.001 |
a
Major professional = physician, lawyer, etc.; Minor professional = nurse, teacher, etc.; skilled worker = administrative personnel, etc.; semi-skilled worker = data entry personnel, etc.; unskilled worker = truck driver, etc.
Data reported as mean (SD) or percent.