Baseline characteristics among patients with type 1 diabetes by age at onset
| Patients, overall | 0–10 years | 11–15 years | 16–20 years | 21–25 years | 25–30 years | |
| Individuals, n | 32 005 | 10 242 | 8164 | 5385 | 4722 | 3492 |
| Women | 14 341 (44.8) | 5100 (49.8) | 3719 (45.6) | 2189 (40.6) | 1919 (40.6) | 1414 (40.5) |
| Age (years) | 33.7 (13.6) | 30.6 (12.7) | 32.0 (13.5) | 33.9 (14.3) | 37.3 (13.4) | 41.0 (12.2) |
| Diabetes duration (years) | 18.9 (13.9) | 24.3 (12.9) | 19.1 (13.5) | 16.0 (14.3) | 14.3 (13.3) | 13.6 (12.2) |
| Debut age of diabetes (years) | 14.7 (7.5) | 6.4 (2.7) | 12.9 (1.4) | 17.9 (1.4) | 23.0 (1.4) | 27.5 (1.1) |
| HbA1c (mmol/mol)/(%) | 65.8 (15.7)/8.2 (1.4) | 68.5 (15.0)/8.4 (1.4) | 66.8 (15.1)/8.3 (1.4) | 63.5 (15.8)/8.0 (1.5) | 62.9 (16.4)/7.9 (1.5) | 63.0 (16.3)/7.9 (1.5) |
| Total cholesterol (mmol/L) | 4.7 (1.0) | 4.7 (1.0) | 4.7 (1.0) | 4.6 (1.0) | 4.7 (1.0) | 4.8 (1.0) |
| LDL cholesterol (mmol/L) | 2.6 (0.8) | 2.6 (0.8) | 2.6 (0.8) | 2.6 (0.8) | 2.7 (0.8) | 2.8 (0.9) |
| Body mass index (kg/m2) | 24.8 (3.7) | 24.8 (3.6) | 24.7 (3.7) | 24.5 (3.8) | 24.9 (3.9) | 25.1 (3.8) |
| Systolic blood pressure (mm Hg) | 125.4 (16.0) | 124.5 (15.5) | 125.1 (15.8) | 125.4 (16.1) | 126.5 (16.4) | 127.1 (16.6) |
| Smokers | 3945 (13.4) | 1196 (12.6) | 1012 (13.4) | 610 (12.3) | 633 (14.5) | 494 (15.3) |
| Albuminuria | ||||||
| No albuminuria | 21 826 (85.2) | 6681 (81.7) | 5501 (84.7) | 3817 (88.1) | 3341 (87.9) | 2486 (88.7) |
| Microalbuminuria | 2298 (9.0) | 907 (11.1) | 586 (9.0) | 314 (7.2) | 284 (7.5) | 207 (7.4) |
| Macroalbuminuria | 1485 (5.8) | 592 (7.2) | 406 (6.3) | 202 (4.7) | 175 (4.6) | 110 (3.9) |
| eGFR (mL/min/1.73 m2) | 100.5 (28.3) | 100.9 (28.8) | 103.0 (29.1) | 101.3 (28.5) | 98.1 (26.8) | 94.9 (25.1) |
| Antihypertensives | 5630 (18.7) | 1944 (20.3) | 1442 (18.7) | 860 (17.0) | 774 (17.3) | 610 (18.4) |
| Statins | 2830 (9.7) | 792 (8.5) | 655 (8.8) | 475 (9.6) | 491 (11.3) | 417 (13.0) |
| Insulin pump | 2545 (17.4) | 1377 (27.3) | 775 (20.3) | 208 (8.5) | 108 (5.6) | 77 (5.6) |
Data are n (%) for categorical variables and mean (SD) for continuous variables unless otherwise indicated.
eGFR, estimated glomerular filtration rate; LDL, low-denisty lipoprotein.