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Table 4 The assessment test with the cutoff of HR or SaO2 for AMS

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

Cutoff AMS Non-AMS N Sensitivity (%) Specificity (%) PPV (%) NPV (%)
AEG
SaO2 < 88 % Yes 160 68 228 0.35 0.77 0.70 0.43
No 301 223 524
HR > 25 Yes 155 52 207 0.34 0.82 0.75 0.44
No 306 239 545
SaO2 < 88 % + HR >25 Yes 73 9 82 0.16 0.97 0.89 0.42
No 388 282 670
PAG
SaO2 < 86 % Yes 33 27 60 0.32 0.83 0.55 0.66
No 71 136 207
HR > 15 Yes 37 29 66 0.36 0.82 0.56 0.67
No 67 134 201
SaO2 < 86 % + HR > 15 Yes 17 3 20 0.16 0.98 0.85 0.65
No 87 160 247
  1. AEG Acute exposure group, PAG Pre-acclimatization group, HR The difference of HR between pre-exposure and post-exposure, PPV Positive predictive value, NPV Negative predictive value