Association of whole blood copper, magnesium and zinc levels with metabolic syndrome components in 6–12-year-old rural Chinese children: 2010–2012 China National Nutrition and Health Survey

Table 2 Distribution of metabolic syndrome component indicators by tertiles (T1–T3) of blood copper (Cu), zinc (Zn), the Cu/Zn ratio and ³ã³ (Mg) levels

Indexes	Cu (mg/L)				Zn (mg/L)				Cu/Zn			Mg (mg/L)
Indexes	T1 < 0.94	T2 0.94- 1.06	T3 > 1.06	P value	T1 < 4.64	T2 4.64- 5.70	T3 > 5.70	P value	T1 < 0.17	T2 0.17- 0.21	T3 > 0.21	P value	T1 < 38.89	T2 38.89–43.66	T3 > 43.66	P value
N = 911	294	315	302		300	310	301		295	311	305		300	310	301
BMI (kg/m²)	16.16	16.23	16.85	0.004	16.21	16.45	16.58	0.250	16.45	16.48	16.31	0.733	16.25	16.56	16.42	0.388
Waist (cm)	55.91	55.21	56.78^*	0.046	55.52	55.98	56.36	0.430	55.96	56.36	55.54^*	0.444	55.13	56.10	56.64	0.060
TG (mmol/L)	0.86	0.78	0.74^#	0.011	0.74	0.82	0.82^*	0.063	0.91	0.75	0.72^#	0.001	0.73	0.85	0.79	0.010
HDL-C (mmol/L)	1.28	1.27	1.26	0.085	1.25	1.28	1.28	0.325	1.28	1.28	1.26	0.695	1.26	1.28	1.27	0.735
FG (mmol/L)	4.79	4.89	4.88	0.201	4.82	4.81	4.93^*	0.062	4.87	4.87	4.82	0.601	4.81	4.80	4.95	0.015
SBP (mmHg)	92.27	91.94	93.13	0.412	90.54	92.94	93.83^*	0.001	93.86	92.84	90.67^#	0.002	91.22	92.84	93.25	0.070
DBP (mmHg)	59.28	60.21	61.19^*	0.026	58.58	60.95	61.15^*	0.001	61.17	60.35	59.21^#	0.020	58.98	60.56	61.15^*	0.006

The bold numbers, P value was < 0.05, and the difference was statistically significant
BMI, body mass index; DBP, diastolic blood pressure; FG, fasting glucose; HDL-C, high density lipoprotein-cholesterol; SBP, systolic blood pressure; TG, triglycerides; *positive correlation; ^#negative correlation

ISSN: 1743-7075