Table A1.

Pairwise comparisons of the demographic characteristics of the three groups.

	p Value of Three Groups Comparison	p Value of Pairwise Comparison
		Penglai vs. Huzhu	Penglai vs. Yushu	Huzhu vs. Yushu
Total	-
Gender
Male (%)	0.140	-	-	-
Female (%)
Age (years)	<0.001	<0.001	0.048	1.000
Race
Han (%)	<0.001	<0.001	<0.001	<0.001
Tibetan (%)	<0.001	<0.001	<0.001	<0.001
Tu (%)	<0.001	<0.001	0.095	0.015