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Table 1 Demographic data for the 192 subjects who reported on day of study

From: A new efficient trial design for assessing reliability of ankle-brachial index measures by three different observer groups

 

Group 1

Group 2

Group 3

Group 4

Group 5 Stand-bys

Total

p-values (global test of all 5 groups)*

Validation groups (Groups 1, 2 and 3)

Number of participants

36

36

36

36

48

192

 

108

Age: mean (± SD)

68.8 (1.4)

68.7 (1.5)

68.5 (1.5)

68.3 (1.5)

68.7 (2.4)

68.6 (1.7)

0.619

68.7 (1.5)

Sex: N (%)

      

0.530

 

   M

15 (41.7%)

20 (55.6%)

15 (41.7%)

19 (52.8%)

27 (56.3%)

96 (50%)

 

50 (46.3%)

   F

21 (58.3%)

16 (44.4%)

21 (58.3%)

17 (47.2%)

21 (43.7%)

96 (50%)

 

58 (53.7%)

BMI: mean (± SD)

28.5 (4.3)

29.2 (4.7)

29.2 (4.0)

29.0 (5.2)

29.3 (4.9)

29.1 (4.6)

0.956

29.0 (4.3)

< 25: N (%)

5 (13.9%)

7 (19.4%)

2 (5.6%)

5 (13.9%)

11 (22.9%)

30 (15.6%)

0.455

14 (13.0%)

25 – < 30: N (%)

19 (52.8%)

16 (44.4%)

19 (52.8%)

18 (50.0%)

16 (33.3%)

88 (45.8%)

 

54 (50.0%)

>= 30: N (%)

12 (33.3%)

13 (36.1%)

15 (41.7%)

13 (36.1%)

21 (43.8%)

74 (38.5%)

 

40 (37.0%)

WHR: mean (± SD)

0.91 (0.09)

0.93 (0.09)

0.91 (0.08)

0.95 (0.09)

0.92 (0.08)

0.92 (0.09)

0.408

0.92 (0.09)

   M

0.97 (0.05)

1.0 (0.04)

0.99 (0.07)

1.0 (0.06)

0.97 (0.07)

  

0.99 (0.05)

   F

0.86 (0.09)

0.84 (0.05)

0.86 (0.05)

0.89 (0.07)

0.87 (0.05)

  

0.86 (0.06)

Smoker status: N (%)

        

   Active smoker

3 (8.3%)

3 (8.3%)

4 (11.1%)

7 (19.4%)

6 (12.5%)

23 (12.0%)

0.538

10 (9.3%)

   Former smoker

17 (47.2%)

17 (47.2%)

10 (27.8%)

11 (30.6%)

19 (39.6%)

74 (38.5%)

 

44.(40.7%)

   Non-smoker

16 (44.4%)

16 (44.4%)

22 (61.1%)

18 (50.0%)

23 (47.9%)

95 (49.5%)

 

54 (50.0%)

Hypertension: N (%)

        

   Yes

20 (57.1%)

20 (57.1%)

21 (60.0%)

20 (55.6%)

34 (70.8%)

115 (60.8%)

0.571

61 (58.1%)

   No

15 (42.9%)

15 (42.9%)

14 (40.0%)

16 (44.4%)

14 (29.2%)

74 (39.2%)

 

44 (41.9%)

   Missing

1

1

1

0

0

3

 

3

Hypercholesterolemia: N (%)

        

   Yes

18 (52.9%)

16 (45.7%)

23 (65.7%)

16 (55.2%)

21 (48.8%)

94 (53.4%)

0.501

57 (54.8%)

   No

16 (47.1%)

19 (54.3%)

12 (34.3%)

13 (44.8%)

22 (51.2%)

82 (46.6%)

 

47 (45.2%)

   Missing

2

1

1

7

5

16

 

4

Diabetes: N (%)

        

   Yes

4 (11.1%)

7 (19.4%)

6 (16.7%)

5 (13.9%)

11 (22.9%)

33 (17.2%)

0.673

17 (15.7%)

   No

32 (88.9%)

29 (80.6%)

30 (83.3%)

31 (86.1%)

37 (77.1%)

159 (82.8%)

 

91 (84.3%)

Vascular-widening procedures (n): N (%)

        

   Yes

0 (0%)

1 (2.8%)

0 (0%)

2 (5.6%)

3 (6.5%)

6 (3.2%)

0.359

1 (0.9%)

   No

36 (100%)

35 (97.2%)

36 (100%)

34 (94.4%)

43 (93.5%)

184 (96.8%)

 

107 (99.1%)

   Missing

0

0

0

0

2

2

 

0

  1. * p-values: Chi square, Fisher's exact test or analysis of variance