Psychological correlates of acute mountain sickness: a prospective study.

AMS-positive status significantly impaired overall mental health in mountaineers.

• Linear Mixed Models (LMM) were used to isolate effects of AMS status from environmental confounders.
• Overall mental health impairment was statistically significant at p = 0.009.
• Sample consisted of 15 mountaineers assessed across four time points: one week before ascent, upon arrival at high altitude, immediately post-climb, and one week after.
• Three expeditions were included covering altitudes ranging from 5276 m to 6621 m.

AMS led to significant elevations in multiple specific psychological symptom domains.

• Significant elevations were found in somatization, obsessive-compulsive symptoms, interpersonal sensitivity, depression, anxiety, and hostility (all p < 0.05).
• LMM analysis was used to identify these effects.
• These findings reflect pathological psychological distress rather than generalized mood fluctuations.
• AMS had no significant impact on general affect.

AMS specifically exacerbated mental fatigue but had no significant impact on physical fatigue or general affect.

• The effect of AMS on mental fatigue was statistically significant (p = 0.022).
• Physical fatigue was not significantly affected by AMS status.
• General affect was also not significantly impacted by AMS.
• This distinction suggests AMS drives mental exhaustion specifically rather than broadly affecting all fatigue or mood dimensions.

Headache was identified as a pervasive predictor of somatization and interpersonal sensitivity.

• GEE (Generalized Estimating Equations) scanning was used to identify symptom-specific drivers of psychological outcomes.
• Headache predicted both somatization and interpersonal sensitivity across timepoints.
• Headache is a cardinal symptom of AMS assessed in the study expeditions.
• Specific p-values for headache's effect on somatization and interpersonal sensitivity were not reported in the abstract.

Dizziness emerged as the most robust predictor of physical fatigue among AMS symptoms.

• The association between dizziness and physical fatigue was statistically significant at p = 0.002.
• GEE scanning was the method used to identify this symptom-level predictor.
• Dizziness was described as 'the most robust predictor of physical fatigue' among symptoms examined.
• This finding was identified through symptom-level GEE analysis rather than aggregate AMS status.

The study employed a prospective repeated-measures design with four assessment time points across three high-altitude expeditions.

• Fifteen mountaineers participated across three expeditions: Erfeng of Siguniang Mountain (5276 m, 4 days), Mount Wukuchu (5526 m, 6 days), and Mount Geladandong (6621 m, 9 days).
• Assessments occurred one week before ascent, upon arrival at high altitude, immediately post-climb, and one week after.
• LMM was employed to isolate AMS effects from environmental confounders.
• GEE was used to identify specific symptom-level predictors of psychological outcomes.