Table 1.
Baseline Characteristics of Persons With Type 1 Diabetes and Controls.
| HbA1c categories at baseline (NGSP%/IFCC mmol/mol) | ||||||||
|---|---|---|---|---|---|---|---|---|
| Controls n = 169 249 | All type 1 diabetes n = 33 915 | ≤6.9% (≤52 mmol/mol) n = 6142 | 7.0-7.8% (53-62 mmol/mol) n = 7759 | 7.9-8.7% (63-72 mmol/mol) n = 8951 | 8.8-9.6% (73-82 mmol/mol) n = 5442 | ≥9.7% (≥83 mmol/mol) n = 4000 | Missing value n = 1621 | |
| Women | 76 382 (45.1%) | 15 302 (45.1%) | 2711 (44.1%) | 3470 (44.7%) | 3984 (44.5%) | 2451 (45.0%) | 1942 (48.6%) | 744 (45.9%) |
| Age (years) | 35.7 (14.6) | 35.8 (14.6) | 33.9 (14.2) | 37.2 (15.1) | 37.5 (14.8) | 36.1 (14.2) | 32.8 (13.4) | 32.6 (14.5) |
| Born in Sweden | 146 353 (86.5%) | 31 838 (93.9%) | 5732 (93.3%) | 7333 (94.5%) | 8462 (94.5%) | 5110 (93.9%) | 3728 (93.2%) | 1473 (90.9%) |
| Education category | ||||||||
| Low | 31 238 (18.7%) | 6503 (19.3%) | 859 (14.1%) | 1372 (17.8%) | 1704 (19.2%) | 1181 (21.9%) | 1028 (25.9%) | 359 (22.4%) |
| Mid | 80 436 (48.1%) | 16 890 (50.2%) | 2729 (44.8%) | 3688 (48.0%) | 4557 (51.2%) | 2926 (54.2%) | 2204 (55.6%) | 786 (49.1%) |
| High | 55 547 (33.2%) | 10 249 (30.5%) | 2507 (41.1%) | 2627 (34.2%) | 2631 (29.6%) | 1293 (23.9%) | 734 (18.5%) | 457 (28.5%) |
| Variables in the National Diabetes Registry only | ||||||||
| HbA1c (mmol/mol) | 65.8 (15.8) | 45.6 (5.5) | 57.3 (2.6) | 67.2 (2.8) | 76.9 (2.8) | 94.9 (11.3) | ||
| Diabetes duration (years) | 20.4 (14.8) | 16.4 (15.9) | 22.0 (15.0) | 22.8 (14.3) | 21.5 (13.6) | 18.3 (12.9) | 16.8 (14.8) | |
| BMI (kg/m2) | 25.1 (4.0) | 24.6 (4.0) | 25.0 (3.8) | 25.3 (3.8) | 25.4 (4.1) | 25.0 (4.7) | 24.7 (5.0) | |
| LDL (mmol/L) | 2.66 (0.83) | 2.53 (0.76) | 2.60 (0.79) | 2.68 (0.83) | 2.74 (0.86) | 2.87 (0.95) | 2.59 (0.81) | |
| Systolic BP (mmHg) | 126.9 (17.0) | 124.4 (15.9) | 126.8 (16.6) | 128.4 (17.1) | 127.8 (17.2) | 127.0 (18.1) | 123.7 (16.6) | |
| Diastolic BP (mmHg) | 73.6 (9.2) | 72.2 (8.9) | 73.0 (8.9) | 73.8 (9.0) | 74.4 (9.3) | 75.1 (9.6) | 72.9 (9.4) | |
| Smoking | 4277 (13.6%) | 515 (8.9%) | 770 (10.5%) | 1121 (13.3%) | 859 (16.9%) | 855 (23.4%) | 157 (13.1%) | |
| Registrations in the Inpatient Registry prior to baseline | ||||||||
| AMI (I21) | 967 (0.6%) | 745 (2.2%) | 78 (1.3%) | 181 (2.3%) | 221 (2.5%) | 140 (2.6%) | 95 (2.4%) | 30 (1.9%) |
| CHD (I20-I25) | 1826 (1.1%) | 1459 (4.3%) | 173 (2.8%) | 349 (4.5%) | 433 (4.8%) | 262 (4.8%) | 180 (4.5%) | 62 (3.8%) |
| AF (I48) | 938 (0.6%) | 242 (0.7%) | 46 (0.7%) | 58 (0.7%) | 72 (0.8%) | 31 (0.6%) | 25 (0.6%) | 10 (0.6%) |
| HF (I50) | 515 (0.3%) | 513 (1.5%) | 62 (1.0%) | 100 (1.3%) | 159 (1.8%) | 82 (1.5%) | 76 (1.9%) | 34 (2.1%) |
| Stroke (I61-I64) | 728 (0.4%) | 501 (1.5%) | 67 (1.1%) | 117 (1.5%) | 140 (1.6%) | 82 (1.5%) | 68 (1.7%) | 27 (1.7%) |
| Cancer (C00-C97) | 2506 (1.5%) | 607 (1.8%) | 105 (1.7%) | 155 (2.0%) | 170 (1.9%) | 90 (1.7%) | 53 (1.3%) | 34 (2.1%) |
For categorical variables n (%) is presented. For continuous variables, mean (SD) is presented.