Table 2 Characteristics at baseline according to quartiles of perfusion index.

Perfusion index (%)

 ≤ 1.10

1.11–2.60

2.61–4.30

 ≥ 4.31

P-value

n

278

284

254

264

–

Sex (male/female)

188/90

196/88

176/78

214/50

0.002

Age (y)

75(68–80)

74.5(67–81)

74(68–78)

71(62–77)

 < .0001

Duration of diabetes (y)

8 (4–12)

7 (4–12)

8 (4–13)

6 (3–12)

0.14

BMI (kg/m²)

24.0 (21.4–27.8)

24.6 (21.6–27.5)

24.4 (22.1–27.4)

25.1 (23.1–27.3)

0.008

Average SBP (mmHg)

133 (117–147)

131 (118–143)

130 (116–141)

129 (117–141)

0.33

Heart rate (beat per minutes)

76 (68–90)

77.5 (68–86)

74 (67–85)

72.5 (61–84)

0.0002

Hemoglobin A1c (%)

6.8 (6.2–7.9)

7 (6.4–7.8)

6.6 (6.2–7.4)

6.9 (6.3–7.8)

0.11

T-CHO (mg/dl)

168 (146–199)

170 (143–204)

172 (149–207)

167 (150–201)

0.27

Triglycerides (mg/dl)

114 (89–149)

115 (83–170)

117 (88–154)

117 (84–181)

0.33

Uric acid (mg/dl)

5.6 (4.3–6.9)

5.4 (4.3–6.7)

5.4 (4.4–6.7)

5.7 (4.6–6.8)

0.41

Creatinine (mg/dl)

1.07 (0.84–3.24)

0.95 (0.76–1.26)

0.95 (0.79–1.25)

0.92 (0.75–1.27)

 < .0001

Smoking (%)

0.003

Never

45.3

40.1

44.1

36.4

Previous

25.2

23.2

14.7

23.5

Current

29.5

36.6

41.3

40.2

PI (%)

0.56 (0.25–0.84)

2.0 (1.5–2.2)

3.3 (3.0–3.8)

5.8 (5.0–7.0)

 < .0001