Correlation of acute mountain sickness risk with natural geographical factors of high altitude
Objective To understand the correlation between acute mountain sickness(AMS)and natural geographical factors at high altitude above 4 000 m.Methods Two groups of 292 individuals were tracked and investigated in April 2020,traveling from Yecheng(1 300 m)to Shiquan River(4 300 m)on the Xin-Zang Highway for a total of four days.Daily LLS-AMS self-assessment questionnaire was used to survey subjects'AMS,blood oxygen saturation and heart rate were measured by a pulse oximeter.The meteorological data were collected from the China Meteorological Data Sharing Service System,extracted and calculated the Normalized Difference Vegetation Index(NDVI)through Landsat satellite imagery.Results The overall incidence of AMS was 25.68％.The peak of AMS in both groups occurred on the third day after ascending to high altitude,which was significantly higher than other times(x2=60.03,P＜0.001),and the incidence on the fourth day was significantly lower(x2=27.06,P＜0.001).The comparison between groups showed that the incidence and score of AMS in Group A on the 1st,2nd and 3rd were significantly higher than Group B(P＜0.05).The results of multiple logistic regression showed a significant correlation between temperature and AMS(OR:0.842,95％CI:0.741-0.957).Conclusion The 4-day gradual acclimatization can effectively reduce the incidence of AMS when ascending to high altitude above 4 000 m.The temperature is an important influencing factor for AMS.
High altitudeAcute mountain sicknessNatural geographical factorsAir temperature
NETL
NSTL
万方数据
