Table 3. Genotype of three SNPs within the EPAS1 gene and differences in Hb levels in different populations.

	Hb (g/L) SNP sites	Wild type	Heterozygous mutation	Homozygous mutation
Plain group	rs13419896	151.2 ± 12.2	147.6 ± 12.0	149.1 ± 9.8
	rs1868092	149.8 ± 12.3	147.5 ± 10.3	133.0 ± 0.0
	rs4953354	150.1 ± 11.2	148.0 ± 14.0	140.7 ± 12.4
Plateau (3 days)	rs13419896	173.7 ± 12.9	171.6 ± 10.5	170.4 ± 5.3
	rs1868092	172.6 ± 11.4	172.3 ± 10.1	164.0
	rs4953354	172.4 ± 10.1	172.3 ± 14.4	172.5 ± 12.0
Plateau (7 days)	rs13419896	174.9 ± 9.4	174.3 ± 12.7	169.7 ± 10.4
	rs1868092	170.5 ± 28.9	173.8 ± 10.7	150.0
	rs4953354	169.3 ± 30.1	175.8 ± 10.6	166.0 ± 22.6
Plateau (30 days)	rs13419896	177.7 ± 10.9	175.7 ± 9.5	170.8 ± 11.7
	rs1868092	177.7 ± 8.7	169.4 ± 14.8	165.0
	rs4953354	176.1 ± 7.4	175.9 ± 17.0	173.0 ± 11.3
Plateau (>10 years)	rs13419896	174.5 ± 11.3	171.1 ± 18.8	158.2 ± 19.8
	rs1868092	171.2 ± 16.3	171.3 ± 19.5	170.0 ± 6.0
	rs4953354	170.3 ± 16.1	169.4 ± 19.0	177.4 ± 11.0
Native Tibetans	rs13419896	172.0 ± 16.8	158.9 ± 31.5	153.8 ± 27.7
	rs1868092	189.7 ± 18.0	154.7 ± 29.4	150.1 ± 25.1
	rs4953354	160.7 ± 24.3	158.3 ± 32.1	152.9 ± 28.7