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Table 1 Distribution of selected characteristics in the whole sample and by the presence of an abnormal ABI

From: Association between different measurements of blood pressure variability by ABP monitoring and ankle-brachial index

 

Total sample (n = 425)

Abnormal ABI* (n = 58)

Normal ABI (n = 367)

P**

Age (years)

57.4 ± 12.1

63.6 ± 10.6

56.4 ± 12.0

<0.001

Male

131 (30.8%)

21 (36.2%)

110 (30%)

0.34

Body mass index (kg/m2)

30.8 ± 5.8

29.7 ± 5.5

30.9 ± 5.9

0.12

White

280 (65.9%)

34 (58.6%)

246 (67%)

0.21

Alcohol abuse (> 30 g/day)

35 (8.2%)

6 (10.3%)

29 (7.9%)

0.53

Current Smoking

111 (26.1%)

16 (27.6%)

95 (25.9%)

0.44

(Years at school)

   

0.005

≤ 4 years

124 (29.2%)

26 (44.8%)

98 (26.7%)

 

> 4 years

301 (70.8%)

32 (55.2%)

269 (73.3%)

 

Diabetes mellitus

94 (22.1%)

20 (34.5%)

74 (20.2%)

0.01

Duration of hypertension (years)

   

0.01

≤ 10 years

212 (49,9%)

191 (53.5%)

21 (36.2%)

 

> 10 years

203 (47.8%)

166 (46.5%)

37 (63.8%)

 

Cardiovascular disease

119 (28%)

19 (32.8%)

100 (27.2%)

0.38

Office SBP (mmHg)

152.4 ± 25.9

156.9 ± 28.8

151.7 ± 25.5

0.16

Office DBP (mmHg)

88.7 ± 14.8

85.6 ± 14.7

89.2 ± 14.8

0.08

24-hour SBP (mmHg)

136.8 ± 17.3

141.0 ± 18.0

136.2 ± 17.1

0.04

24-hour DBP (mmHg)

80.9 ± 12.5.

78.8 ± 12.9

81.3 ± 12.5

0.13

Use of antihypertensive

316 (74.4%)

45 (77.6%)

271 (73.8%)

0.54

N° antihypertensive drugs (P25%-75%)

1 (1-1)

2 (1-3)

2 (0-3)

0.19

Time Rate SBP index (mmHg/min)

0.476 ± 0.124

0.516 ± 0.146

0.469 ± 0.119

0.007

SD SBP (mmHg)

12.7 ± 3.8

13.2 ± 4.7

12.6 ± 3.7

0.26

CV SBP (%)

9.3 ± 2.7

9.3 ± 2.6

9.3 ± 2.9

0.91