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. 2019 Oct 28;7:e7943. doi: 10.7717/peerj.7943

Table 1. The baseline characteristics of each group.

No. Age BMI Smoking Altitude (m) First exposure?
Plains 190 24.12 ± 4.40 23.00 ± 1.12 No 500
Han entered plateau 3rd day 50 23.50 ± 4.42 23.07 ± 1.16 No 4200
Han entered plateau 7th day 50 19.48 ± 1.25 22.29 ± 1.35 No 4,200
Han entered plateau 30th day 44 22.70 ± 3.60 22.25 ± 1.50 No 3,700
The plateau Han population (living in plateau>10years) 24 41.50 ± 7.60 22.63 ± 1.39 No 3,700
Tibetan 155 35.31 ± 15.53 23.16 ± 1.76 No 3,700