Table 1

Baseline characteristics of adults with T1D from the FinnDiane study cohort according to each AD

No AD (n = 3,671)Any AD (n = 1,087)Hypothyroidism (n = 859)Hyperthyroidism (n = 112)Addison disease (n = 18)Celiac disease (n = 207)Atrophic gastritis (n = 49)
Sex, female 42.1 65.7**** 68.9**** 71.4**** 66.7* 57.5**** 55.1 
Age (years) 37.5 (28.7–46.9) 39.4 (30.0–48.2)** 39.5 (30.4–48.3)*** 37.2 (28.8–46.5) 41.3 (35.6–44.9) 38.7 (28.9–47.5) 46.2 (36.6–55.3)**** 
Age at diabetes diagnosis (years) 14.2 (9.2–22.6) 14.0 (9.2–23.3)** 14.3 (9.5–24.1) 13.2 (8.4–21.2) 12.5 (6.0–20.1) 12.8 (7.1–20.9)* 17.7 (11.0–27.2)* 
Age at diagnosis of diabetes        
 0–14 years 52.8 57.3 52.4 58.0 55.6 59.9* 46.9 
 ≥15 years 47.2 42.7 47.6 42.0 44.4 40.1 53.1 
Duration of diabetes (years) 21.3 (11.6–30.9) 22.0 (13.9–31.5) 22.0 (13.5–31.3)* 22.1 (12.2–29.9) 27.6 (21.2–33.1) 22.8 (15.3–31.8)* 24.2 (18.0–37.8)** 
HbA1c (%) 8.4 ± 1.5 8.4 ± 1.5 8.5 ± 1.5 8.6 ± 1.6 8.4 ± 1.6 8.5 ± 1.4 8.4 ± 1.3 
HbA1c (mmol/mol) 68.4 ± 16.2 68.8 ± 16.0 69.0 ± 16.3 70.4 ± 17.0 68.3 ± 17.4 69.1 ± 15.4 68.0 ± 15.4 
Smoking history 47.1 46.9 46.7 58.2* 33.3 43.5 62.2* 
Height (cm) 171.9 ± 1.5 168.5 ± 9.2 168.2 ± 9.1 167.7 ± 9.0 167.3 ± 7.9 168.7 ± 8.9 170.1 ± 10.1 
Weight (kg) 74.1 ± 13.4 71.9 ± 13.3 72.0 ± 13.5* 71.1 ± 12.6 68.4 ± 11.0 69.6 ± 11.7* 74.1 ± 16.1 
BMI (kg/m2) 25.0 ± 3.6 25.2 ± 3.8* 25.4 ± 3.8** 25.2 ± 3.7 24.5 ± 4.0 24.4 ± 3.4* 25.5 ± 4.4 
Waist-to-hip ratio 0.88 ± 0.09 0.85 ± 0.08 0.85 ± 0.08 0.84 ± 0.07 0.84 ± 0.06 0.85 ± 0.08 0.88 ± 0.08 
Systolic blood pressure (mmHg) 135 ± 19 133.±18 NS 133 ± 18.6 130 ± 18 129 ± 19 132 ± 16 139 ± 19 
Diastolic blood pressure (mmHg) 80 ± 10 79 ± 10 NS 79 ± 10 78 ± 10 77 ± 7 78 ± 10 82 ± 9 
Total cholesterol (mmol/L) 4.93 ± 1.02 4.91 ± 0.90 4.93 ± 0.90 4.92 ± 0.79 5.32 ± 0.95 4.87 ± 0.94 4.86 ± 0.81 
LDL cholesterol (mmol/L) 3.05 ± 0.88 3.03 ± 0.81 3.05 ± 0.81 2.98 ± 0.73 3.44 ± 0.93 3.02 ± 0.84 3.05 ± 0.83 
HDL cholesterol (mmol/L) 1.33 ± 0.40 1.37 ± 0.39 1.37 ± 0.39 1.40 ± 0.38 1.17 ± 0.37* 1.31 ± 0.41 1.35 ± 0.38 
Triglycerides (mmol/L) 1.05 (0.79–1.51) 1.00 (0.74–1.42) 1.00 (0.75–1.42) 1.04 (0.74–1.54) 1.28 (0.96–1.78) 0.99 (0.72–1.50) 0.98 (0.73–1.34) 
No AD (n = 3,671)Any AD (n = 1,087)Hypothyroidism (n = 859)Hyperthyroidism (n = 112)Addison disease (n = 18)Celiac disease (n = 207)Atrophic gastritis (n = 49)
Sex, female 42.1 65.7**** 68.9**** 71.4**** 66.7* 57.5**** 55.1 
Age (years) 37.5 (28.7–46.9) 39.4 (30.0–48.2)** 39.5 (30.4–48.3)*** 37.2 (28.8–46.5) 41.3 (35.6–44.9) 38.7 (28.9–47.5) 46.2 (36.6–55.3)**** 
Age at diabetes diagnosis (years) 14.2 (9.2–22.6) 14.0 (9.2–23.3)** 14.3 (9.5–24.1) 13.2 (8.4–21.2) 12.5 (6.0–20.1) 12.8 (7.1–20.9)* 17.7 (11.0–27.2)* 
Age at diagnosis of diabetes        
 0–14 years 52.8 57.3 52.4 58.0 55.6 59.9* 46.9 
 ≥15 years 47.2 42.7 47.6 42.0 44.4 40.1 53.1 
Duration of diabetes (years) 21.3 (11.6–30.9) 22.0 (13.9–31.5) 22.0 (13.5–31.3)* 22.1 (12.2–29.9) 27.6 (21.2–33.1) 22.8 (15.3–31.8)* 24.2 (18.0–37.8)** 
HbA1c (%) 8.4 ± 1.5 8.4 ± 1.5 8.5 ± 1.5 8.6 ± 1.6 8.4 ± 1.6 8.5 ± 1.4 8.4 ± 1.3 
HbA1c (mmol/mol) 68.4 ± 16.2 68.8 ± 16.0 69.0 ± 16.3 70.4 ± 17.0 68.3 ± 17.4 69.1 ± 15.4 68.0 ± 15.4 
Smoking history 47.1 46.9 46.7 58.2* 33.3 43.5 62.2* 
Height (cm) 171.9 ± 1.5 168.5 ± 9.2 168.2 ± 9.1 167.7 ± 9.0 167.3 ± 7.9 168.7 ± 8.9 170.1 ± 10.1 
Weight (kg) 74.1 ± 13.4 71.9 ± 13.3 72.0 ± 13.5* 71.1 ± 12.6 68.4 ± 11.0 69.6 ± 11.7* 74.1 ± 16.1 
BMI (kg/m2) 25.0 ± 3.6 25.2 ± 3.8* 25.4 ± 3.8** 25.2 ± 3.7 24.5 ± 4.0 24.4 ± 3.4* 25.5 ± 4.4 
Waist-to-hip ratio 0.88 ± 0.09 0.85 ± 0.08 0.85 ± 0.08 0.84 ± 0.07 0.84 ± 0.06 0.85 ± 0.08 0.88 ± 0.08 
Systolic blood pressure (mmHg) 135 ± 19 133.±18 NS 133 ± 18.6 130 ± 18 129 ± 19 132 ± 16 139 ± 19 
Diastolic blood pressure (mmHg) 80 ± 10 79 ± 10 NS 79 ± 10 78 ± 10 77 ± 7 78 ± 10 82 ± 9 
Total cholesterol (mmol/L) 4.93 ± 1.02 4.91 ± 0.90 4.93 ± 0.90 4.92 ± 0.79 5.32 ± 0.95 4.87 ± 0.94 4.86 ± 0.81 
LDL cholesterol (mmol/L) 3.05 ± 0.88 3.03 ± 0.81 3.05 ± 0.81 2.98 ± 0.73 3.44 ± 0.93 3.02 ± 0.84 3.05 ± 0.83 
HDL cholesterol (mmol/L) 1.33 ± 0.40 1.37 ± 0.39 1.37 ± 0.39 1.40 ± 0.38 1.17 ± 0.37* 1.31 ± 0.41 1.35 ± 0.38 
Triglycerides (mmol/L) 1.05 (0.79–1.51) 1.00 (0.74–1.42) 1.00 (0.75–1.42) 1.04 (0.74–1.54) 1.28 (0.96–1.78) 0.99 (0.72–1.50) 0.98 (0.73–1.34) 

Data are mean ± SD, median (IQR), or percentage. P value refers to ANOVA, Kruskal-Wallis test, or χ2 test. NS, not significant.

*

P < 0.05;

**

P < 0.01;

***

P < 0.001;

****

P < 0.0001; comparison with the T1D individuals without additional AD.

Sex-adjusted.

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