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Table 2 Baseline characteristics of trial participants

From: Protocol for a randomized controlled trial to test the acceptability and adherence to 6-months of walnut supplementation in Chinese adults at high risk of cardiovascular disease

  Total (n = 210) Control (n = 70) Low dose (n = 70) High dose (n = 70)
Age (y), mean (SD) 65.4 (7.3) 64.4 (7.4) 64.7 (8.5) 67.0 (5.7)
Female (%) 46.7 47.1 50.0 42.9
Education
 Primary school or lower (%) 73.3 70.0 70.0 80.0
 Junior high school (%) 18.1 17.1 18.6 18.6
 Senior high school or above (%) 8.6 12.9 11.3 1.4
Past smoker (%) 44.3 44.3 40.0 48.6
Current smoker(%) 15.2 17.1 11.4 17.1
Past drinking (%) 34.3 35.7 34.3 32.9
Current drinking (%) 4.3 2.9 2.9 7.1
Body mass index (kg/m2), mean (SD) 26.4 (3.4) 26.5 (3.4) 25.8 (3.6) 26.3 (3.1)
Body weight (kg), mean (SD) 68.0 (11.1) 69.1 (11.6) 67.8 (12.5) 67.0 (9.0)
Waist hip ratio (SD) 0.94 (0.1) 0.96 (0.06) 0.94 (0.06) 0.93 (0.06)
 Male (SD) 0.95 (0.1) 0.97 (0.07) 0.93 (0.06) 0.93 (0.06)
 Female (SD) 0.93 (0.1) 0.93 (0.06) 0.94 (0.06) 0.93 (0.06)
Systolic blood pressure (mm Hg), mean (SD) 147.1 (19.9) 146.5 (19.9) 146.5 (21.8) 146.8 (18.1)
Diastolic blood pressure (mm Hg), mean (SD) 84.9 (12.0) 85.0 (12.9) 85.0 (12.3) 84.8 (10.9)
Medication use
 Lipid lowering agent (%) 67.1 55.7 78.6 67.1
 Blood pressure lowering agent (%) 85.2 84.3 80.0 91.4
Disease history
 CVDa(%) 95.2 92.9 98.6 94.3
 Stroke (%) 31.0 24.3 25.7 42.9
 Transient ischemic attack (%) 29.5 21.4 21.4 45.7
 Ischemic heart disease (%) 81.0 78.6 90.0 74.3
 Congestive heart failure (%) 10.5 8.6 8.6 14.3
 Peripheral arterial disease (%) 7.6 8.6 5.7 8.6
 Hypertension (%) 83.3 81.4 80.0 88.6
 Diabetes mellitus (%) 31.4 34.3 30.0 30.0
  1. aIncluded stroke, transient ischemic attack, ischemic heart disease, congestive heart disease and peripheral arterial disease