Table 2.

Demographic characteristics of respondents.

Characteristics		N	Percent
Sex	Males Females	168 163	50.8 49.2
Age (years)	<25 25–50 >50	21 200 110	6.3 60.5 33.2
Average age		44 ± 12 (Min: 18; Max: 79)
Ethnic group	Kinh Minority	331 0	100.0 0.0
Place of residence	Mountain Rural or coastal area Urban	13 226 92	3.9 68.3 27.8
Total		331	100