Table 1. Detailed definitions of attributes and levels.

Attribute	Level
Preventive service time	1. Workday (Non vacation)
	2. Vacation (Usually weekends and statutory holidays)
Preventive effectiveness	1. Low (The probability of reduction in caries following CPS participation is 60%-70%)
	2. General (The probability of reduction in caries following CPS participation is 70%-80%)
	3. High (The probability of reduction in caries following CPS participation is 80%-90%)
	4. Very high (The probability of reduction in caries following CPS participation is higher than 90%)
Distance (minute)	1. ≥50
	2. 25–50
	3. 10–25
	4. ≤10
OOP service cost (Chinese yuan, 2023)	1. 10
	2. 30
	3. 60
	4. 100

OOPout-of-pocket