Table 1 Baseline characteristics of Dutch diabetes outpatients in total and by year of care received

Age (years)

55.0 (1.0–97.0)

56.0 (4.0–94.0)

55.0 (1.0–97.0)

 >50 years (%)

58.0

60.3

57.9

 >65 years (%)

27.4

28.4

26.9

 >80 years (%)

3.2

3.3

2.9

Children (%)

7.0

5.0

7.3

Adults (%)

93.0

95.0

92.7

Male sex (%)

53.1

52.6

53.1

Diabetes duration (years)

11.0 (0.0–72.0)

12.0 (0.0–71.0)

7.0 (0.0–72.0)

unknown (%)

27.4

34.0

16.1

Smoking status

 smoker (%)

11.6

12.1

11.2

 non-smoker (%)

64.5

64.5

61.5

 unknown (%)

24.0

23.4

27.3

Diabetes type

 type 1 (%)

26.1

13.2

45.0

 type 2 (%)

25.3

22.1

36.4

 other/secondary (%)

0.2

0.1

0.4

 unspecified (%)

1.9

1.2

3.5

 unknown (%)

46.5

63.3

14.7

BMI (kg/m²)

27.3 (10.0–49.8)

27.8 (13.6–49.8)

26.8 (10.0–49.7)

 <20 (%)

7.0

4.9

7.9

 20–24 (%)

20.4

20.1

19.5

 25–29 (%)

24.0

24.6

22.8

 ≥30 (%)

26.6

29.2

23.3

unknown (%)

22.0

21.2

26.4

Cholesterol

 HDL-c (mmol/l)

1.3 (0.2–4.1)

1.3 (0.2–4.1)

1.3 (0.3–4.1)

 unknown (%)

16.6

16.0

17.8

 LDL-c (mmol/l)

2.4 (0.1–8.4)

2.4 (0.1–7.8)

2.3 (0.1–8.4)

 unknown (%)

31.2

32.4

33.5

Blood pressure

 systolic (mmHg)

134.0 (70.0–235.0)

136.0 (87.0–216.0)

132.0 (70.0–235.0)

 diastolic (mmHg)

76.0 (40. 0–126.0)

75.0 (40.0–118.0)

77.0 (40.0–126.0)

 unknown (%)

75.0

74.1

69.0

Kidney function

 eGFR (ml/min/1.73m²)

83.0 (2.0–100.0)

81.0 (2.0–100.0)

83.0 (3.0–100.0)

 unknown (%)

26.1

24.9

26.7

 albuminuria (mg/l)

10.0 (0.1 - 6175.0)

10.0 (0.1–5135.0)

10.0 (0.2–6175.0)

 unknown (%)

28.1

29.2

29.3

HbA1c (mmol/mol)

60.0 (25.0–148.0)

60.0 (25.0–148.0)

61.0 (25.0–148.0)

 ≤53 mmol/mol (%)

27.5

27.8

25.4

 ≤64 mmol/mol (%)

59.8

60.4

56.5

 ≤86 mmol/mol (%)

88.8

89.8

85.9

 unknown (%)

3.8

2.7

6.5