Table 3. Demographic characteristics of study participants in the resident convenience sample surveys before and after the intervention.

Factors	Category	Pre-intervention (n = 387)	Post-intervention (n = 385)	P 值
Women		49.9	51.7	0.614
Age	30~40 yrs	27.4	28.8	0.710
	41~50 yrs	27.9	28.8
	51~60 yrs	29.2	25.5
	>60 yrs	15.5	16.9
Occupation	Workera	25.8	28.3	0.294
	Farmerb	19.1	19.2
	Administrative staff c	13.7	13.8
	Self-employedd	22.5	25.5
	Unemployede	18.9	13.3
Education	Never attended school	7.5	5.2	0.195
	Primary school	16.5	13.3
	Junior middle school	40.3	38.4
	High school and equitable	25.1	31.2
	College and above	10.6	12.0

^aIncluding people who work in State-owned or Certain scale private enterprise with a stable income.

^b Including people mainly engaged in agricultural work.

^c Including people who work in state-run institutions with a stable income, such as doctors, teachers etc.

^dIcluding people without fixed work and fixed income, such as waiters, cleaners etc.

^eIncluding people who are unemployed and without any income, such as housewives, etc.