Table 1.

Sociodemographic characteristics.

Characteristic	Adult Group (>18 Years)		Child Group (≤18 Years)
	Frequency	Percent	Frequency	Percent
Number of clusters	12	60.0	8	40.0
Number of participants	565	43.6	730	56.4
Gender
Male	185	32.7	397	54.4
Female	380	67.3	333	45.6
Education level
Less than primary school	214	37.9	14	1.9
Primary school	310	23.0	405	55.5
Secondary school or above	221	39.1	311	42.6
Ethnicity
Han	55	9.7	93	12.7
Dai	105	18.6	82	11.2
Aini	125	22.1	102	14.0
Yi	157	27.8	144	19.7
Yao	102	18.1	154	21.1
Other	21	3.7	155	21.2
Occupation
Farmer	453	80.2	8	1.1
Student or other	112	19.8	722	98.9
Family size
≤3	127	22.5	70	9.6
4–5	258	45.7	441	60.4
≥6	180	31.9	219	30.0
Annually family income (CNY¥ per capita)
≤8000	193	34.2	123	16.8
8000–12,000	152	26.9	254	34.8
12,000–15,000	118	20.9	249	34.1
≥15,000	102	18.1	104	14.2