Table 1

Overall baseline characteristics of patients with type 1 diabetes by BMI

Type 1 diabetes, overallBMI 18.5 to <25 kg/m2BMI 25 to <30 kg/m2BMI ≥30 kg/m2Missing variables, n (%)
Individuals, n26,12515,2888,6772,160
Women11,616 (44.5)6,949 (45.5)3,540 (40.8)1,127 (52.2)0 (0)
Age (years)33.3 (13.0)32.2 (13.1)34.9 (12.9)34.4 (12.6)0 (0)
Socioeconomic status
 Marital status
  Divorced1,657 (6.3)932 (6.1)574 (6.6)151 (7.0)1 (<0.1)
  Married7,307 (28.0)3,825 (25.0)2,832 (32.6)650 (30.1)1 (<0.1)
  Single16,974 (65.0)10,420 (68.2)5,216 (60.1)1,338 (61.9)1 (<0.1)
  Widowed186 (0.7)111 (0.7)54 (0.6)21 (1.0)1 (<0.1)
 Education
  10–12 years14,213 (54.9)8,139 (53.8)4,823 (56.1)1,251 (58.7)255 (1.0)
  ≤9 years5,108 (19.7)2,986 (19.7)1,643 (19.1)479 (22.5)255 (1.0)
  College or university6,549 (25.3)4,013 (26.5)2,134 (24.8)402 (18.9)255 (1.0)
 Income,* median (IQR)1,271.0 (844.0, 1,711.0)1,222.0 (771.0, 1,656.0)1,355.5 (954.0, 1,792.0)1,267.0 (894.5, 1,711.5)1 (1.0)
 Swedish born24,756 (96.2)14,503 (96.3)8,213 (96.0)2,040 (95.9)381 (1.5)
Variables from Swedish NDR
 Diabetes duration (years)18.5 (13.3)17.6 (13.3)20.0 (13.1)19.1 (13.0)0 (0)
 Debut age of diabetes (years)14.8 (7.5)14.6 (7.4)14.9 (7.6)15.3 (7.6)0 (0)
 HbA1c (mmol/mol)/(%)65.5 (15.4)/8.1 (1.4)65.1 (16.1)/8.1 (1.5)65.7 (14.2)/8.2 (1.3)68.0 (14.5)/8.4 (1.3)573 (2.2)
 Waist circumference (cm)86.6 (12.1)79.9 (8.0)92.1 (8.6)105.8 (10.4)23,117 (88.5)
 LDL cholesterol (mmol/L)2.6 (0.8)2.5 (0.8)2.8 (0.8)3.0 (0.9)16,622 (63.6)
 Total cholesterol (mmol/L)4.7 (1.0)4.6 (0.9)4.8 (1.0)5.0 (1.0)15,863 (60.7)
 Smoker3,279 (13.3)2,139 (14.7)892 (10.9)248 (12.3)1,398 (5.4)
 BMI (kg/m2)24.8 (3.6)22.5 (1.6)26.9 (1.3)32.8 (3.1)0 (0)
 Systolic BP (mmHg)125.2 (15.7)123.2 (15.4)127.5 (15.5)129.7 (16.3)979 (3.7)
 Diastolic BP (mmHg)73.2 (8.9)72.2 (8.8)74.4 (8.8)76.2 (9.1)979 (3.7)
Albuminuria
 No albuminuria18,419 (86.1)10,989 (87.9)6,047 (84.4)1,383 (80.4)4,730 (18.1)
 Microalbuminuria1,814 (8.5)927 (7.4)691 (9.6)196 (11.4)4,730 (18.1)
 Macroalbuminuria1,162 (5.4)592 (4.7)428 (6.0)142 (8.3)4,730 (18.1)
eGFR (mL/min/1.73 m2)100.2 (27.3)102.4 (27.6)97.1 (25.9)97.1 (28.5)14,801 (56.7)
Antihypertensives4,157 (16.6)2,001 (13.7)1,622 (19.4)534 (25.9)1,135 (4.3)
Statins1,890 (7.8)803 (5.7)794 (9.9)293 (14.9)2,031 (7.8)
Insulin treatment26,125 (100.0)15,288 (100.0)8,677 (100.0)2,160 (100.0)0 (0)
  • Data are n (%) for categorical variables and mean (SD) for continuous variables unless otherwise indicated. BP, blood pressure; IQR, interquartile range.

  • *Income is given in 100 Swedish kronor.