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Table 1 Baseline demographics and laboratory characteristics of participants

From: The renal tubular damage marker urinary N-acetyl-β-d-glucosaminidase may be more closely associated with early detection of atherosclerosis than the glomerular damage marker albuminuria in patients with type 2 diabetes

Baseline characteristics

Total (N = 343)

Group I

At or below mediana

NAG (N = 172)

Group II

Above median

NAG (N = 171)

p values

Demographics

 Age (years)

59.9 ± 11.7

57.2 ± 11.7

62.5 ± 11.0

<0.001

 Male sex [n (%)]

203 (59.2)

101 (58.7)

102 (59.6)

0.86

 BMI (kg/m2)

25.1 (23.1–27.2)

24.8 (23.1–27.1)

25.3 (23.0–27.3)

0.32

 Waist circumference (cm)

87.8 ± 8.95

86.9 ± 8.90

88.7 ± 8.98

0.07

 Currently smoking [n (%)]

53 (15.5)

30 (17.4)

23 (13.5)

0.31

 Hypertension [n (%)]

208 (60.6)

97 (56.4)

111 (64.9)

0.14

 Systolic blood pressure (mmHg)

125.0 (116.0–133.0)

125.0 (115.0–132.3)

124.0 (117.0–133.0)

0.54

 Diastolic blood pressure (mmHg)

74.4 ± 11.0

74.4 ± 11.2

74.6 ± 10.6

0.89

 Coronary artery disease [n (%)]

89 (25.9)

35 (20.3)

54 (31.6)

0.02

 Ischemic stroke [n (%)]

30 (8.75)

16 (9.30)

14 (8.19)

0.72

 Duration of diabetes (years)

9.25 (5.25–16.3)

7.25 (4.4213.3)

11.3 (6.2517.3)

0.001

Laboratory indices

    

 HbA1C (%)

6.80 (6.40–7.40)

6.70 (6.407.10)

7.00 (6.507.70)

0.001

 Glycated albumin (%)

17.1 (15.7–19.5)

16.6 (15.318.6)

18.1 (16.021.7)

<0.001

 Basal glucose (mg/dl)

128.0 (111.0–146.0)

124.0 (110.0140.0)

131.0 (114.0156.3)

0.001

 Stimulated glucose (mg/dl)

191.5 (154.8–236.3)

176.5 (140.3214.8)

208.5 (170.8255.8)

<0.001

 Total cholesterol (mg/dl)

156.0 (131.0–184.0)

155.0 (130.0–185.0)

157.5 (136.3–183.0)

0.48

 Triglyceride (mg/dl)

116.0 (80.0–161.0)

115.0 (78.0–157.0)

118.5 (85.8–175.0)

0.28

 HDL cholesterol (mg/dl)

44.0 (39.0–53.0)

44.0 (40.0–52.0)

42.0 (38.0–53.0)

0.17

 LDL cholesterol (mg/dl)

83.6 (61.3–106.7)

81.6 (59.8–107.0)

84.6 (63.7–102.3)

0.90

 White blood cell count (103/µl)

6.46 (5.38–8.03)

6.41 (5.47–7.63)

6.55 (5.36–8.43)

0.50

 Uric acid (mg/dl)

5.00 (4.20–5.90)

5.30 (4.30–5.90)

4.90 (4.00–5.93)

0.16

 Creatinine (mg/dl)

0.79 (0.66–0.93)

0.77 (0.66–0.89)

0.82 (0.66–0.97)

0.12

 eGFR CKD-EPI (ml/min/1.73 m2)

94.0 (82.0–101.0)

96.0 (88.0104.0)

91.0 (78.099.0)

<0.001

Indices of diabetes complications

    

 Urinary NAG (U/g creatinine)

7.21 (4.89–11.4)

4.89 (3.706.21)

11.4 (8.7216.7)

<0.001

 Urinary ACR (mg/g creatinine)

10.0 (5.58–22.6)

8.43 (4.9017.8)

12.8 (6.5434.6)

<0.001

 Mean carotid IMT (mm)

0.69 (0.60–0.80)

0.67 (0.580.77)

0.72 (0.600.84)

0.02

 Maximum carotid IMT (mm)

0.85 (0.73–1.01)

0.82 (0.700.97)

0.90 (0.741.06)

0.01

 Mean of maximum carotid IMT (mm)

0.81 (0.69–0.94)

0.78 (0.660.91)

0.83 (0.710.98)

0.01

 Presence of carotid plaques [n (%)]

248 (72.3)

114 (66.3)

136 (79.5)

0.01

  1. Continuous variables are described as mean ± SD for parametric variables and median (interquartile range) for nonparametric variables
  2. NAG N-acetyl-β-d-glucosaminidase, BMI body mass index, HDL high density lipoprotein, LDL low density lipoprotein, eGFR estimated glomerular filtration rate, CKD-EPI chronic kidney disease epidemiology collaboration, ACR albumin-to-creatinine ratio, IMT intima-media thickness, SD standard deviation
  3. Bolditalics denotes statistical significance at p < 0.05
  4. aMedian of NAG = 7.21 U/g creatinine