Table 1

Basic characteristics and dietary nutrient intake of case and control subjects
Variable Case subjects Control subjects
N = 123 N = 135
Frequency (%) Frequency (%) P-value1
Gender 0.90
Female 51 (41.4) 57 (42.2)
Male 72 (58.5) 78 (57.8)
Physical activity level 0.53
Heavy 15 (12.2) 21 (15.6)
Moderate 50 (40.7) 59 (43.7)
Light 58 (47.2) 55 (40.7)
Smoking status 0.03
Current smoker 52 (42.3) 40 (29.6)
Non-smoker 71 (57.7) 95 (70.4)
Mean ± Std Dev Mean ± Std Dev P-value2
Education level, years 14.4 (2.0) 15.3 (1.5) <0.0001
Age, years 54.0 (10.4) 53.7 (9.7) 0.89
SBP, mmHg 144 (16.0) 118 (14.4) <0.0001
DBP, mmHg 87 (9.3) 75 (9.5) <0.0001
BMI, kg/m2 28.2 (3.0) 23.3 (2.7) <0.0001
WC, cm 88.0 (9.6) 81.2 (8.2) <0.0001
TC, mmol/l 5.4 (1.1) 4.8 (0.8) <0.0001
TG, mmol/l 2.7 (1.8) 1.1 (0.9) <0.0001
HDL-c, mmol/l 1.3 (0.2) 1.4 (0.3) <0.0001
LDL-c, mmol/l 3.2 (0.8) 2.7 (0.7) <0.0001
FBG, mmol/l 6.9 (1.8) 5.5 (1.5) <0.0001
Uric acid, μmol/l 341.1 (52.4) 306.7 (58.1) <0.0001
Nutrients
Energy, kcal 2198.4 (596.5) 1966.0 (305.3) <0.0001
Protein, g 70.4 (20.5) 68.9 (14.5) 0.49
Total fat, g 81.5 (26.4) 71.8 (17.0) <0.05
Cholesterol, mg 498.7 (267.3) 430.7 (215.5) <0.05
Vitamin A , μg RE 600.3 (155.5) 629.4(360.0) 0.55
Thiamine, mg 0.9 (0.3) 1.9 (1.1) 0.32
Riboflavin, mg 0.9 (0.3) 1.6 (0.8) 0.34
Niacin, mg 15.0 (7.1) 15.3 (9.9) 0.83
Vitamin C, mg 101.9 (41.4) 106.0 (46.5) 0.58
Vitamin E, mg 27.5 (8.7) 29.9 (8.7) <0.05
Calcium, mg 457.5 (207.3) 489.1 (178.1) 0.19
Magnesium, mg 303.3 (78.6) 332.3 (77.8) <0.05
Iron, mg 23.0 (7.3) 23.3 (10.7) 0.82
Zinc, mg 12.5 (3.0) 11.9 (2.2) 0.10
Selenium, μg 58.9 (23.8) 57.9 (17.5) 0.72
Potassium, mg 1813.6 (377.3) 1836.0 (513.1) 0.69
Sodium, mg 3698.3 (868.2) 3377.6 (685.5) <0.0001
Copper, mg 2.0 (1.6) 1.9 (0.6) 0.41

1 P-value for chi-square test

2 P-value for independent-samples t test

Bian et al.

Bian et al. Nutrition Journal 2013 12:106   doi:10.1186/1475-2891-12-106

Open Data