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Table 1 Comparison of AMS and no-AMS (total n = 74) volunteers at an altitude of 3860 m

From: Systemic pro-inflammatory response facilitates the development of cerebral edema during short hypoxia

  day 1  day 2  day 3 
AMS 33/74 (44.6 %) 16/74 (21.6 %) 11/74 (14.9 %)
 Headache 33/33 (100 %) 16/16 (100 %) 11/11 (100 %)
No-AMS 41/74 (55.4 %) 58/74 (78.4 %) 63/74 (85.1 %)
 Headache only 8/41 (19.5 %) 7/58 (12.0 %) 6/63 (14.6 %)
 Headache + one symptom 9/41 (21.9 %) 9/58 (15.5 %) 3/63 (4.8 %)
Others (no-headache) 12/41 (29.2 %) 15/58 (25.9 %) 14/63 (22.2 %)
No symptom 12/41 (29.2 %) 27/58 (46.6 %) 40/63 (63.5 %)
  1. Note: % indicates the incidence of symptom