Table 1 Baseline characteristics of study participants with peripheral artery disease (N = 90)

From: Nicotinamide riboside for peripheral artery disease: the NICE randomized clinical trial

Baseline variable

Trial assignment

NR+resveratrol

NR alone

Placebo

(N = 33)

(N = 28)

(N = 29)

Age (years), mean (SD)

70.73 (8.97)

73.21 (9.97)

69.72 (8.29)

Male, n (%)

19 (57.58)

16 (57.14)

13 (44.83)

Female, n (%)

14 (42.42)

12 (42.86)

16 (55.17)

African American, n (%)

19 (57.58)

8 (28.57)

16 (55.17)

Ankle brachial index, mean (SD)

0.67 (0.20)

0.72 (0.18)

0.64 (0.18)

Body mass index (kg/m2), mean (SD)

29.30 (6.66)

28.65 (3.61)

30.37 (6.39)

Current smoker, n (%)

9 (27.27)

7 (25.00)

10 (34.48)

Former smoker, n (%)

19 (57.58)

16 (57.14)

13 (44.83)

Myocardial infarction, n (%)

6 (18.18)

3 (10.71)

5 (17.24)

Heart failure, n (%)

3 (9.09)

3 (10.71)

5 (17.24)

Stroke, n (%)

9 (27.27)

1 (3.57)

8 (27.59)

Angina, n (%)

5 (15.15)

3 (10.71)

2 (6.90)

Pulmonary disease, n (%)

8 (24.24)

8 (28.57)

9 (31.03)

Diabetes, n (%)

15 (45.45)

12 (42.86)

16 (55.17)

Intermittent claudication, n (%)

4 (12.12)

4 (14.29)

6 (20.69)

Atypical leg symptoms other than intermittent claudication, n (%)

24 (72.73)

20 (71.43)

17 (58.62)

No exertional leg pain, n (%)

5 (15.15)

4 (14.29)

6 (20.69)

6-min walk distance (meters), mean (SD)

336.61 (80.75)

339.18 (103.07)

325.60 (112.51)

Total treadmill walking time (min), mean (SD)a

9.94 (5.26)

7.29 (4.08)

7.11 (3.44)

WIQ distance score, mean (SD)

40.83 (31.66)

45.12 (28.20)

43.47 (24.85)

WIQ speed score, mean (SD)

41.40 (25.52)

47.01 (27.16)

43.40 (20.50)

WIQ stair-climbing score, mean (SD)

57.70 (31.32)

56.10 (27.18)

52.30 (30.55)

  1. SD standard deviation.
  2. aSample sizes for treadmill walking time were 16 for NR alone, 17 for NR + resveratrol, and 14 for placebo. WIQ denotes walking impairment questionnaire and is scored on a 0–100 scale (100-best).