The Mediating Role of Cognitive Function in the Relationship Between Acute High-Altitude Stress and Casualty Care Capability Following Rapid Ascent.

In 30 seconds

This multicenter, randomized, sham-controlled trial examined whether cognitive function mediates the relationship between acute high-altitude stress and casualty care capability after rapid ascent. It compared integrated cognitive-stress management training, sham training, and a sea-level control, with 92 participants per group. In the sham-trained high-altitude group, cognitive ability had a significant negative indirect effect on care capability at 24, 48, and 72 hours, but not 96 hours; the direct effect of stress became significantly negative at 72 hours. In the trained group, significant total and indirect effects were observed at 24 and 48 hours, with no statistically significant effects at 72 or 96 hours.

Key findings

• In the high-altitude group, cognitive ability mediated a negative indirect effect on casualty care capability at 24, 48, and 72 hours; this effect was absent by 96 hours.
• The direct effect of stress in the high-altitude group was not significant at 48 hours, became significantly negative at 72 hours, and the total effect was explained by stress at 96 hours.
• In the integrated-training group, total and indirect effects were significant at 24 and 48 hours, while no effects were statistically significant at 72 or 96 hours.

Why it matters

The findings suggest that cognitive function is one pathway linking acute high-altitude stress with casualty care capability early after rapid ascent, while stress may have a more direct negative relationship later. This time-dependent pattern highlights the potential importance of monitoring both cognitive performance and stress responses when evaluating medical personnel’s operational capability in high-altitude settings.

What to keep in mind

The abstract does not report effect sizes or confidence intervals for the mediation results, limiting assessment of their magnitude.