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Table 1 Distribution of baseline characteristics across categories of fish consumption: the Tromsø Study

From: Fish consumption, fish oil supplements and risk of atherosclerosis in the Tromsø study

  Fish servings, times per week  
Baseline characteristics < 1
n = 258
1–1.9
n = 1325
2–2.9
n = 977
≥ 3
n = 1340
p-trend
Age, y 58.4 (0.4) 59.3 (0.2) 61.8 (0.2) 63.0 (0.2) < 0.0001
Male, % 40.8 46.6 54.1 55.0 < 0.0001
Higher education, %a 16.9 20.3 17.6 18.9 0.8
Physical active, % 19.8 23.0 24.5 23.4 0.4
BMI, kg/m2 26.4 (0.2) 25.9 (0.1) 25.9 (0.1) 26.1 (0.1) 0.9
Total cholesterol, mmol/L 6.83 (0.08) 6.77 (0.03) 6.79 (0.04) 6.78 (0.03) 0.9
LDL cholesterol, mmol/L 4.48 (0.07) 4.44 (0.03) 4.46 (0.04) 4.48 (0.03) 0.7
HDL cholesterol, mmol/L 1.50 (0.03) 1.56 (0.01) 1.57 (0.01) 1.57 (0.01) 0.07
LDL/HDL ratio 3.20 (0.07) 3.12 (0.03) 3.05 (0.04) 3.10 (0.03) 0.3
Triglycerides, mmol/L 1.85 (0.06) 1.68 (0.03) 1.66 (0.03) 1.61 (0.03) 0.002
Systolic blood pressure, mmHg 146.7 (1.3) 144.4 (0.6) 146.2 (0.7) 145.5 (0.6) 0.6
Diastolic blood pressure, mmHg 85.2 (0.8) 83.4 (0.3) 84.4 (0.4) 83.9 (0.3) 0.9
Hypertension, % 60.2 53.9 56.9 56.4 0.7
Current smoking, % 29.3 31.1 31.2 33.7 0.09
Diabetes, % 2.5 2.8 1.7 2.8 0.9
Fish oil supplements, %b 45.6 50.5 45.1 52.4 0.2
Antihypertensive medication, % 11.7 10.3 10.7 9.8 0.4
Lipid-lowering medication, %c 0.8 1.7 1.1 1.9 0.4
Leukocyte count, ×  109/L 6.76 (0.12) 6.84 (0.05) 6.95 (0.06) 6.95 (0.05) 0.048
Monocyte count, ×  109/L 0.59 (0.01) 0.58 (0.01) 0.59 (0.01) 0.59 (0.01) 0.2
Fibrinogen, g/L 3.39 (0.05) 3.38 (0.02) 3.37 (0.03) 3.40 (0.02) 0.7
LogCRP, mg/ml 0.31 (0.07) 0.26 (0.03) 0.22 (0.04) 0.26 (0.03) 0.6
  1. Age was sex-adjusted and sex was age-adjusted. All other variables were age- and sex-adjusted means (SE) or %
  2. BMI body mass index
  3. aCollege or university
  4. b610 (15.6%) participants had missing information on fish oil supplements
  5. cParticipants < 70 years