Descriptive statistics (mean (SD) or count (%)) on 17 449 patients with type 1 diabetes by categories of BMI at first inclusion in the registry in 2002–2004
| Variable | All (n=17 449) | <18.5 (n=182) | 18.5–24.9 (n=9140) | 25.0–29.9 (n=6330) | 30.0–35.0 (n=1454) | >35.0 (n=343) |
| Age, years (SD) | 39.5 (13.2) | 39.0 (16.7) | 39.0 (13.6) | 40.0 (12.5) | 40.6 (12.3) | 39.3 (12.7) |
| Diabetes duration, years (SD) | 24.0 (13.7) | 23.2 (17.5) | 23.8 (14.1) | 24.5 (13.1) | 24.0 (13.2) | 20.7 (13.9) |
| BMI kg/m² (SD) | 25.2 (3.8) | 17.7 (0.8) | 22.6 (1.6) | 27.0 (1.4) | 31.8 (1.4) | 38.2 (3.7) |
| Smokers, n (%) | 2229 (13.5) | 40 (23.3) | 1319 (15.2) | 658 (11.0) | 183 (13.4) | 29 (9.3) |
| Hba1c mmol/mol (SD) | 64.8 (14.3) | 69.8 (18.8) | 64.3 (14.9) | 64.9 (13.2) | 66.6 (13.5) | 66.7 (15.1) |
| Systolic BP mm Hg (SD) | 128.4 (16.8) | 123.2 (20.8) | 126.5 (16.7) | 129.9 (16.3) | 133.4 (16.7) | 130.4 (17.4) |
| Diastolic BP mm Hg (SD) | 73.9 (8.8) | 71.1 (9.3) | 72.8 (8.7) | 74.8 (8.7) | 76.9 (9.0) | 76.6 (9.2) |
| LDL cholesterol mmol/L, (SD) | 2.8 (0.8) | 2.6 (0.8) | 2.7 (0.8) | 2.9 (0.8) | 3.0 (0.9) | 3.0 (0.9) |
| HDL cholesterol mmol/L, (SD) | 1.6 (0.5) | 1.7 (0.4) | 1.7 (0.5) | 1.6 (0.4) | 1.5 (0.4) | 1.3 (0.4) |
| Total cholesterol mmol/L, (SD) | 4.9 (0.9) | 4.8 (1.1) | 4.8 (0.9) | 5.0 (0.9) | 5.2 (1.0) | 5.1 (1.0) |
| Triglycerides mmol/L, (SD) | 1.2 (0.9) | 1.2 (0.7) | 1.0 (0.7) | 1.2 (0.9) | 1.5 (1.3) | 1.9 (1.7) |
| Creatinine µmol/L (SD) | 87.7 (49.8) | 94.3 (72.1) | 87.6 (52.9) | 87.6 (41.4) | 89.6 (60.2) | 83.6 (46.9) |
| Microalbuminuria, n (%) | 2127 (14.8) | 20 (14.9) | 1014 (13.4) | 822 (15.7) | 214 (18.3) | 57 (20.5) |
| Macroalbuminuria, n (%) | 1363 (8.1) | 22 (13.6) | 673 (7.6) | 484 (8.0) | 154 (11.2) | 30 (9.2) |
| Primary school, n (%) | 2494 (14.9) | 32 (20.4) | 1169 (13.3) | 986 (16.1) | 249 (18.0) | 58 (18.0) |
| High school, n (%) | 8449 (50.3) | 77 (49.0) | 4191 (47.7) | 3210 (52.4) | 770 (55.5) | 201 (62.2) |
| University, n (%) | 5844 (34.8) | 48 (30.6) | 3430 (39.0) | 1934 (31.5) | 368 (26.5) | 64 (19.8) |
| BP medication, n (%) | 5002 (29.4) | 38 (21.6) | 2336 (26.1) | 1940 (31.5) | 553 (39.4) | 135 (40.1) |
| Lipid medication, n (%) | 2733 (16.5) | 23 (13.5) | 1124 (12.9) | 1151 (19.1) | 355 (26.3) | 80 (24.6) |
BMI, body mass index; BP, blood pressure; HDL, high-density lipoprotein; LDL, low-density lipoprotein.