Chart 1. Variables (outcome and independent) used in the study.

Variable	Description of the variable	Categories	Data source
Outcome
Goal in the periodontics specialty	Number of months in which the goal was achieved in the periodontics specialty	Achieved the goal. Did not achieve the goal.	DATA-SUS
Independent variables of the 1st level: related to BDSC (institutional level).
Type of access	What type of demand determines access to Periodontics at the BDSC?	Referral only. Mixed (spontaneous and referral)	PMAQ-CEO
Quotas of procedures per oral health team in Primary Health Care	Are there predefined quotas set by the Basic Oral Health team for referring users to the BDSC in the specialty of Periodontics?	Yes No	PMAQ-CEO
Monitoring of established goals	Is monitoring and analysis of established goals carried out for each specialty offered at the BDSC?	Yes No	PMAQ-CEO
Sum of periodontics workload	What is the total weekly workload of the dentists working in the Periodontics specialty?	Description (Number)	PMAQ-CEO
Number of dentists working in periodontics	How many dentists work in the Periodontics specialty?	Description (Number)	PMAQ-CEO
Planning and periodic evaluation of actions	Are the actions carried out in this BDSC the result of periodic planning and evaluation?	Yes No	PMAQ-CEO
BDSC scope	Does this BDSC have only municipal coverage (is it a reference only for this municipality)?	Yes No	PMAQ-CEO
BDSC type	There are three types of BDSC, and each receives an incentive amount for implementation and funding provided by the Ministry of Health and the type of BDSC varies according to the number of dental chairs: Type I (with 3 dental chairs) Type II (with 4 to 6 dental chairs) Type III (with more than 7 dental chairs)	Type I Type II Type III	PMAQ-CEO

BDSC = Brazilian Dental Specialty Centers; PHC = Primary Health Care; PMAQ-CEO = National Access and Quality Improvement Program of Dental Specialty Centers.