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Table 1 Distribution of demographic data and clinical parameters between AMS and non-AMS

From: A specific objective supplemental factor in evaluating acute mountain sickness: ΔHR in combination with SaO2

Parameter AEG (n = 752) PAG (n = 267)
AMS (n = 461) Non-AMS (n = 291) P-value AMS (n = 104) Non-AMS (n = 163) P-value
Age (year) 23.0 ± 3.9 22.8 ± 3.9 0.475 22.2 ± 2.5 21.8 ± 2.3 0.162
BMI (kg/m2) 21.7 ± 2.2 21.8 ± 2.0 0.496 21.2 ± 1.8 21.4 ± 2.6 0.303
Han/ethnicity (%) 87.0 % 88.3 % 0.856 87.7 % 88.9 % 0.737
Medicine use (%) 0 % 0 %   0 % 0 %  
Smokers (%) 36.9 % 44.7 % 0.058 36.5 % 47.9 % 0.067
LLS 4.8 ± 1.7 1.6 ± 1.1 0.000 4.5 ± 1.6 1.2 ± 1.2 0.000
HR (pre-exposure) 65.7 ± 9.6 65.7 ± 9.6 0.978 75.6 ± 9.8 78.3 ± 10.6 0.091
HR (post-exposure) 86.5 ± 12.1a 82.2 ± 10.9a 0.003 86.8 ± 12.5a 85.1 ± 10.9a 0.487
HR (post-pre) 20.9 ± 11.7 16.6 ± 10.6 0.009 11.1 ± 12.0 6.9 ± 9.0 0.010
SaO2 (pre-exposure) 98.10 ± 1.00 98.12 ± 1.02 0.436 91.60 ± 2.31 91.82 ± 2.30 0.45
SaO2 (post-exposure) 88.35 ± 3.23a 89.38 ± 2.76a 0.008 86.52 ± 2.60a 87.67 ± 2.82a 0.007
SaO2 (pre-post) 9.75 ± 3.31 8.73 ± 2.89 0.008 5.08 ± 3.13 4.15 ± 2.86 0.010
  1. AMS Acute mountain sickness, AEG Acute exposure group, PAG Pre-acclimatization group, LLS Lake Louise Score, HR The difference of HR between pre-exposure and post-exposure, SaO 2 The difference of SaO2 between pre-exposure and post-exposure, Pre-post Pre-exposure minus post-exposure, Post-pre Post-exposure minus pre-exposure. a P < 0.01 compared with pre-exposure