Table 1.

Serum lipid profiles (mmol/L) in Chinese primary school children by gender and by living area

	Urban area				p-value * (between genders)	Rural area				p-value * (between genders)	p-value * (between urban and rural areas)
	Boys		Girls			Boys		Girls
	Mean	SD	Mean	SD		Mean	SD	Mean	SD
n	311		272			88		102
TC	3.96	0.62	3.96	0.63	0.9	3.43	0.54	3.58	0.69	0.09	<0.0001
TG	0.99	0.52	1.04	0.60	0.3	0.92	0.64	0.95	0.47	0.7	0.1
HDL-C	1.49	0.36	1.46	0.33	0.2	1.40	0.26	1.41	0.27	0.7	0.006
LDL-C	1.94	0.52	1.94	0.52	1	1.64	0.40	1.74	0.60	0.2	<0.0001

TC total cholesterol, TG triglyceride, HDL-C high density lipoprotein cholesterol, LDL-C low density lipoprotein cholesterol

*p-value was calculated by Student’s t-test.