Change in sleep, gastrointestinal symptoms, and mood states at high altitude (4500m) for 6 months.

Purpose: This study aimed to investigate the alterations in sleep quality and sleep patterns among military personnel at altitudes ranging from 1500 to 4500 m, as well as the associated factors influencing their sleep.

Methods: This study employed a longitudinal prospective survey conducted over a period of six months, from November 2023 to June 2024. A total of 90 soldiers were recruited for participation.