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Table 1 Baseline characteristic of 21,054 US male physicians according to nut consumption

From: Nut consumption and risk of atrial fibrillation in the Physicians' Health Study

Variables Categories of nut consumption
  Rarely/Never
N = 4,273
1-3/month
N = 7,654
1/week
N = 4,965
2-6/week
N = 3,617
≥ 7/week
N = 545
Age (years) 55.4 ± 9.9 54.3 ± 9.4 54.3 ± 9.3 54.5 ± 9.3 55.9 ± 9.8
Body mass index (kg/m 2 ) 24.8 ± 2.9 24.8 ± 2.8 24.9 ± 2.8 24.7 ± 2.6 24.1 ± 2.5
Randomized to ASA (%) 50.4 49.9 49.2 50.6 50.6
Randomized to Beta-Carotene (%) 50.6 49.9 50.2 49.2 50.5
Hypercholesterolemia (%) 12.4 11.6 12.2 12.0 12.6
Hypertension (%) 26.3 23.9 22.9 21.4 19.0
Physical activity 67.2 71.9 74.6 75.5 77.1
[exercise to sweat ≥ 1 per week] (%)      
Current smokers (%) 12.4 10.9 10.5 10.4 11.8
Cereal intake [servings per week]      
(%)      
≤ 1 59.5 55.1 51.6 50.8 50.6
2-6 19.9 23.9 26.5 27.0 18.5
≥ 7 20.6 20.9 22.0 22.2 30.8
Fruit/vegetable (servings/week) 16.4 ± 9.0 16.4 ± 8.6 16.9 ± 8.4 17.4 ± 8.4 18.8 ± 10.8
Peanut butter consumption (%)      
Rarely/Never 65.0 39.8 27.3 27.0 33.0
1-3/month 14.5 31.4 23.9 18.2 22.7
1/week 8.9 13.8 27.5 19.8 14.6
2-6/week 9.3 12.5 19.0 30.8 15.7
≥ 7/week 2.3 2.5 2.4 4.3 14.0
Current drinking (%) 83.0 86.0 86.0 85.0 80.7
Diabetes mellitus (%) 3.7 2.9 2.9 3.6 5.9
Congestive heart failure (%) 0.2 0.1 0.1 0.1 0.0
Coronary heart disease (%) 1.5 1.0 1.0 0.9 0.6
  1. Data are presented as mean ± standard deviation or percentages