Incidence of symptoms of subjects after returning to Chongqing or Kunming after visiting high altitudes.

Data are given as the number (%). *P<0.05 relative to the Kunming group, #P<0.05, relative to 3rd day values, &P<0.05, relative to 50th day values.

数据以例数（百分比）形式给出。*P<0.05，与昆明组相比；#P<0.05，与第3天的观测值相比；&P<0.05，与第50天的观测值相比。