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.
Members of the Hmong ethnic group have lived in the mountains and hills of Southern China and Southeast Asia for thousands of years, though the Hmong have never had their own country. In the 1970s, many Hmong were recruited by the United States to help them fight the Laotian and Vietnamese Communists.