These health-related causes and impacts of elevated hematocrit levels have been reported: 1  Fall in plasma levels. 2  Sleep apnea. 3  Dehydration. 4  In cases of dengue fever, a high hematocrit is a danger sign of an increased risk of dengue shock syndrome.
The Hmong traditionally farmed in the mountainous areas of China, Vietnam, Laos, and Thailand. Most of the Hmong were subsistence farmers who grew only enough food to feed their families, because farming was difficult in the mountainous regions where most of them lived.
Starting in mid-1600s the Chinese began limiting the freedom of the Hmong people. During the early 1800s the Hmong unified in rebellion against the Chinese and afterwards many Hmong families migrated out of China into the mountainous regions of Thailand, Burma, Laos, and Vietnam.