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.
See also: History of the Hmong in Fresno, California and History of the Hmong in Merced, California. California has the largest Hmong population in the United States by state. As of 2010, there are 91,244 Hmong Americans in California, 0.3% of the state's population.