Table 2.
Characteristics of participants with childhood onset type 1 diabetes according to microalbuminuria status (see text for definitions). Figures are mean (SD) years unless stated otherwise
| Normoalbuminuria | Transient microalbuminuria | Intermittent microalbuminuria | Persistent microalbuminuria | P value* | |
|---|---|---|---|---|---|
| No (% of cohort) | 392 (74) | 53 (10) | 17 (3) | 65 (12) | — |
| Age at diagnosis of diabetes | 8.8 (4.1) | 9.0 (3.4) | 10.0 (3.2) | 8.6 (4.2) | 0.05 |
| Duration of diabetes | 9.6 (3.8) | 10.5 (3.1) | 10.2 (2.3) | 10.6 (3.8) | 0.04 |
| Current age | 18.4 (4.7) | 19.5 (3.4) | 20.3 (3.2) | 19.2 (4.6) | 0.01 |
| Smokers (%) | 97 (25) | 14 (26) | 6 (35) | 18 (28) | 0.24 |
| Mean HbA1c before microalbuminuria (%) | 9.5 (1.4) | 10.5 (1.7) | 11.2 (1.3) | 11.1 (1.7) | <0.001 |
| Mean HbA1c after microalbuminuria (%) | — | 9.9 (1.5) | 10.7 (1.7) | 11.1 (2.0) | <0.001 |
*For analysis of variance for comparison of four different groups.