Table 5.

Association between practice-related factors and the overall quality score

Factor	Beta (mean quality score)	95% Confidence interval	p-value
Constant	15.3	12.8 to 18.0	< 0.001
Chained practice (ref.: multi- practice)	2.2	0.3 to 4.1	0.053
Single practice (ref.: multi- practice)	0.9	− 0.2 to 1.9
No information Specialization (ref.: Pediatric dentistry)	− 0.7	− 2.5 to 1.3	0.718
Any Specialization (ref.: Pediatric dentistry)	− 0.8	− 2.9 to 1.2
Rural (ref.: large city)	0.0	− 1.4 to 1.5	0.127
City (ref.: large city)	− 0.7	− 1.5 to 0.0
Age of dentists (cont., per year))	− 0.2	− 0.7 to 0.3	0.445
Number of dentists (cont.)	0.0	− 0.2 to 0.3	0.536

rural (≤ 5.000), city (> 5000- < 100.000), 3—large city (≥ 100.000)