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. 2012 Jun 8;9:50. doi: 10.1186/1743-7075-9-50

Table 1.

Main participant characteristics according to Tertiles of MSG intake

Characteristics  Total (n = 349) MSG intake
P
Tertile 1 (n = 116) Tertile 2 (n = 117) Tertile 3 (n = 116)
Median MSG intake (g/day)
3.6 (2.3–5.25)
1.9 (1.5–2.3)
3.6 (3.2–4.2)
6.0 (5.2–7.4)
 
Women
217 (62.2%)
72 (62.1%)
72 (61.5%)
73 (62.9%)
0.976 2
Age (years)
46.0 (40.0–50.0)
44.0 (40.0–49.0) 1
46.0 (40.0–51.0)
47.0 (42.0–50.0)
0.044 2
Family history of diabetes
102 (29.2%)
36 (31.0%)
31 (26.5%)
35 (30.2%)
0.721 2
Smoking status
 
 
 
 
 
 Never smoked
256 (73.3%)
84 (72.4%)
83 (71.0%)
89 (76.7%)
0.264 2
 Former
10 (2.9%)
3 (2.6%)
4 (3.4%)
3 (2.6%)
 
 Current
83 (23.8%)
29 (25.0%)
30 (25.6%)
24 (20.7%)
 
Physical activity/lifestyle
 
 
 
 
 
 Sedentary
48 (13.7%)
14 (12.1%)
17 (14.5%)
17 (14.7%)
0.721 2
 Moderately active
70 (20.1%)
27 (23.3%)
19 (16.3%)
24 (20.7%)
 
 Vigorously active
231 (66.2%)
75 (64.6%)
81 (69.2%)
75 (64.6%)
 
Daily nutrient intake
 
 
 
 
 
 Energy intake (Kcal)
2,032 (1,747–2,397)
2,051 (1,758–2,381) 1
2,029 (1,687–2,380)
2,017 (1,765–2,413)
0.905 2
 Carbohydrate (g)
333.8 (275.8–412.3)
342.2 (280.9–413.8) 1
328.1 (260.2–422.7)
341.2 (280.8–407.2)
0.569 2
 Fat (g)
33.1 (25.9–43.4)
34.1 (26.1–42.1) 1
32.8 (26.3–44.2)
31.7 (24.5–43.7)
0.739 2
 Total protein (g)
81.1 (68.8–96.9)
82.5 (70.7–97.6) 1
81.1 (67.6–93.0)
70.4 (67.5–95.3)
0.437 2
Metabolic parameters
 
 
 
 
 
 HOMA-IR
2.3 (1.7–3.3)
2.1 (1.6–2.8) 1
2.3 (1.6–3.3)
2.4 (1.9–3.5)
0.028 2
  % HOMA-IR >3
96 (27.5%)
24 (20.7%)
33 (28.2%)
39 (33.6%)
0.028 3
 Insulin (ng/dL)
9.1 (7.0–13.2)
8.5 (6.6–12.0) 1
9.0 (6.8–13.0)
9.9 (7.5–14.1)
0.041 2
 Glucose (mg/dL)
97.0 (92.0–104.0)
97.0 (92.0–104.0) 1
98.0 (91.5–103.5)
99.0 (92.0–105.0)
0.647 2
  % glucose >100 mg/dL
142 (40.7%)
40 (30.7%)
48 (40.9%)
54 (43.0%)
0.062 3
 Triglyceride (mg/dL)
137.7 (104.1–191.1)
139.1 (95.1–197.4) 1
139.0 (104.0–203.1)
134.2 (109.7–187.8)
0.729 2
  % Triglycerides ≥150 mg/dL
145 (41.5%)
48 (41.4%)
49 (41.9%)
48 (41.4%)
0.996 3
 HDL-C (mg/dL)
53.0 (44.0–63.0)
51.0 (41.0–62.8) 1
53.0 (45.0–65.0)
53.5 (45.0–64.0)
0.407 2
  % HDL-C <50 mg/dL F, <40 mg/dL M
112 (32.1%)
44 (37.9%)
34 (29.1%)
34 (29.3%)
0.160 3
 SBP (mmHg)
124.0 (116.0–136.0)
124.0 (116.0–133.8) 1
125.0 (116.0–135.5)
123.0 (115.3–136.8)
0.910 2
 DBP (mmHg)
79.0 (72.5–86.0)
78.0 (73.0–85.0) 1
80.0 (75.0–86.0)
80.0 (71.3–87.0)
0.503 2
  % SBP ≥ 130 and DBP ≥ 85 mmHg
77 (22.1%)
21 (18.1%)
27 (23.1%)
29 (25.0%)
0.206 3
 Waist circumference (cm)
79.0 (72.0–86.0)
78.5 (72.6–85.0) 1
77.0 (71.9–86.0)
81.0 (73.0–88.0)
0.207 2
  %WC >80 cm F, >90 cm M
124 (35.5%)
39 (33.6%)
35 (29.9%)
50 (43.1%)
0.132 3
 BMI (kg/m2)
23.7 (21.2–26.8)
23.5 (21.3–26.4) 1
23.1 (20.9–26.8)
24.6 (21.3–27.3)
0.308 2
  % BMI ≥ 25 kg/m2
130 (37.2%)
36 (31.0%)
41 (35.0%)
53 (45.7%)
0.021 3
Metabolic syndrome (ATP III criteria) 83 (23.8%) 20 (17.2%) 27 (23.1%) 36 (31.0%) 0.014 3

1 Continuous variables are expressed as median (interquartile range).

2P value comparing the characteristics of participants across tertiles of MSG intake using chi-square test for categorical variables and by Kruskal-Wallis test for continuous variables.

3P values comparing prevalence of each metabolic feature across tertiles of MSG intake using the Mantel-Haenszel chi-square test for trend.

HDL-C high density lipoprotein cholesterol, F female, M male, SBP systolic blood pressure DBP diastolic blood pressure, WC Waist circumference, BMI body mass index.

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