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.
The main languages of the family are: Speakers: due to imprecisions in the last Chinese census data, which confuses ethnicity with language, it is impossible to estimate accurately the number of Hmong-Mien speakers. It might range from 7 to 10 million of which 85 % in China.