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Table 1 Clinical patient characteristics

From: Machine learning profiles of cardiovascular risk in patients with diabetes mellitus: the Silesia Diabetes-Heart Project

Parameter

Patients without CVD

(n = 185)

Patients with CVD

(n = 53)

p-value

Demographic parameters

 Men, n%

88 (47.57%)

22 (41.51%)

0.435

Age (years)

48.32 ± 17.26

65.51 ± 8.51

 < 0.0001

Clinical parameters

 Diabetes-related

  BMI (kg/m2)

28.48 ± 6.17

30.86 ± 5.29

0.003

  Duration of diabetes (years)

10.76 ± 8.48

13.79 ± 10.93

0.078

  Type of diabetes (% of type 1)

1.63 ± 0.48

1.91 ± 0.30

 < 0.001

 Concomitant diseases

  Arterial hypertension

92 (49.73%)

48 (90.57%)

 < 0.001

  Chronic kidney disease

78 (42.16%)

32 (60.38%)

0.019

Healed foot ulceration

4 (2.16%)

3 (5.66%)

0.184

 Diabetic peripheral neuropathy

11 (5.95%)

3 (5.66%)

0.938

 Diabetic retinopathy

16 (8.65%)

7 (13.21%)

0.322

Laboratory parameters

 eGFR (ml/min/1.73m2)

91.52 ± 22.48

74.50 ± 19.56

 < 0.0001

 HbA1c (%)

8.66 ± 2.19

8.61 ± 2.06

0.958

 High density lipoprotein

1.50 ± 0.49

1.40 ± 0.47

0.196

 Total cholesterol (mmol/l)

4.72 ± 1.17

4.84 ± 1.51

0.989

 Triglycerides (mmol/l)

1.62 ± 1.08

1.78 ± 0.91

0.117

Pharmacotherapy

 ACEi

49 (26.49%)

31 (58.49%)

 < 0.001

 Alpha-lipoic acid

1 (0.54%)

2 (3.77%)

0.063

 Antidepressants

10 (5.41%)

6 (11.32%)

0.129

 Antiepileptic drugs

7 (3.78%)

5 (9.43%)

0.097

 ARB

23 (12.43%)

9 (16.98%)

0.392

 ASA

22 (11.89%)

34 (64.15%)

 < 0.0001

 Beta-blocker

46 (24.86%)

37 (69.81%)

 < 0.0001

 GLP-1 RA

10 (5.41%)

6 (11.32%)

0.129

 Insulin

122 (65.95%)

35 (66.04%)

0.990

 Metformin

96 (51.89%)

36 (67.92%)

0.038

 NOAC

0 (0.00%)

3 (5.66%)

0.001

 SGLT-2i

31 (16.76%)

12 (22.64%)

0.326

 Statin

53 (28.65%)

37 (69.81%)

 < 0.0001

 Type SGLT-2i

0.37 ± 0.86

0.49 ± 0.97

0.334

 VKA

0 (0.00%)

2 (3.77%)

0.008

Diabetic cardiovascular autonomic neuropathy

 Blood pressure analysis in the standing position

0.54 ± 0.72

0.90 ± 0.85

0.005

 Blood pressure analysis in the standing position after 1 min

0.50 ± 0.72

0.55 ± 0.78

0.829

 Blood pressure analysis in the standing position after 3 min

0.45 ± 0.71

0.55 ± 0.76

0.334

 Handgrip test

0.54 ± 0.81

0.50 ± 0.79

0.812

 Heart rate variation with deep breathing

0.82 ± 0.93

1.32 ± 0.89

0.001

 Test 30:15

0.36 ± 0.65

0.47 ± 0.67

0.166

 Valsalva test after 1 minutre

0.34 ± 0.54

0.51 ± 0.71

0.197

 Valsalva test after 20 s

0.36 ± 0.69

0.83 ± 0.96

0.002

 Ewing’s battery test result

1.79 ± 1.72

2.38 ± 1.50

0.017

Diagnostic parameters of peripheral neuropathy

 Achilles tendon reflex in the left foot

0.03 ± 0.15

0.02 ± 0.14

0.615

 Achilles tendon reflex in the right foot

0.02 ± 0.12

0.02 ± 0.14

0.913

 Left foot appearance

66 (35.68%)

31 (58.49%)

0.003

 Current left foot ulceration

2 (1.08%)

2 (3.77%)

0.179

 Right foot appearance

69 (37.30%)

31 (58.49%)

0.006

 Current right foot ulceration

4 (2.16%)

3 (5.66%)

0.184

 Vibration perception in the left foot

0.05 ± 0.20

0.12 ± 0.29

0.028

 Vibration perception in the right foot

0.04 ± 0.17

0.10 ± 0.25

0.013

 Peripheral neuropathy score

14 (7.57%)

11 (20.75%)

0.006

Quality of life questionnaire

 SF36 Emotional well being

60.37 ± 16.60

59.55 ± 16.37

0.629

 SF36 Energy fatigue

55.00 ± 17.81

52.74 ± 16.69

0.260

 SF36 General health

51.80 ± 17.25

46.04 ± 20.29

0.032

 SF36 Health change

41.94 ± 23.29

38.68 ± 22.77

0.235

 SF36 Pain

71.16 ± 29.17

58.87 ± 28.81

0.004

 SF36 Physical functioning

80.55 ± 23.74

59.43 ± 25.58

 < 0.0001

 SF36 Role limitation due to emotional problems

65.76 ± 39.45

62.26 ± 41.36

0.592

 SF36 Role limitation due to physical health

54.37 ± 41.70

42.45 ± 39.40

0.070

 SF36 Social functioning

75.34 ± 27.72

75.00 ± 29.32

0.941

 MNSI score

3.84 ± 2.86

5.19 ± 3.21

0.007

 PDN diagnosis according to MNSI score

37 (20.00%)

19 (35.85%)

0.016

  1. ACEi Angiotensin Converting Enzyme Inhibitor, ARB Angiotensin II Receptor Blocker, ASA Acetylsalicylic Acid, BMI Body Mass Index, GLP-1 RA Glucagon-like Peptide-1, HbA1c Hemoglobin A1c, HDL-C High Density Lipoprotein Cholesterol, PDN Peripheral Diabetic Neuropathy, SGLT-2i Sodium-Glucose Cotransporter-2, NOAC Novel Oral Anticoagulants, VKA Vitamin K Anticoagulant
  2. For each parameter (if applicable), we report its mean ± standard deviation (SD), whereas for each binary parameter, the total number of ones and the percentage of ones are given. The p-values were calculated using either Mann–Whitney U-test or χ2 test as appropriate.
  3. The most discriminative features are rendered in bold