Table 4.

Association between practice-specific parameters (predictors) and information quality. Generalized linear modelling was performed to assess associations. Practice-specific parameters were entered simultaneously. Overall and domain-specific information quality (as outcomes) are given in the left column. Regression coefficients and 95% confidence intervals (in parentheses) are shown. Statistically significant associations are highlighted in bold

Outcome	Model fit (likelihood, p-value)	Practice type (ref: single owner)	Area (ref. rural)	Age of owner (ref. <50)	Specialized (ref: yes)
Technical/ functional aspects	7.39, p = 0.29	0.18 (−6.93/7.28)	−8.30 (−22.6/6.00)	−5.05 (−12.30/2.19)	1.69 (−5.98/9.36)
Generic quality and risk of bias	5.78, p = 0.45	0.48 (−5.24/6.20)	−1.00 (−12.5/10.5)	−3.13 (−8.95/2.70)	2.07 (−4.10/8.25)
Etiologic factors for periodontitis	1.83, p = 0.94	8.08 (−5.81/21.9)	0.57 (−27.4/28.6)	2.48 (−11.7/16.7)	1.60 (−13.4/16.6)
Prognostic factors	5.79, p = 0.44	5.24 (−2.88/13.4)	7.11 (−9.24/23.5)	0.23 (−8.06/8.51)	−6.58 (−15.4/2.19)
Diagnostic process	16.6, p = 0.01	0.75 (0.44/1.06)	−0.19 (−0.82/0.44)	−0.05 (−0.31/0.21)	−0.35 (−0.61/−0.09)
Treatment stages	6.40, p = 0.38	6.44 (−14.4/27.1)	−15.9 (−57.7/25.9)	14.3 (−6.90/35.4)	−9.44 (−31.9/12.9)
Tooth retention or removal	5.57, p = 0.47	−0.65 (−2.13/0.82)	0.84 (−2.13/3.81)	−0.28 (−1.78/1.23)	−1.18 (−2.77/0.42)
Total	6.41; p = 0.38	3.46 (−2.34/9.27)	−1.77 (−13.4/9.92)	−0.53 (−6.44/5.39)	−2.19 (−8.46/4.08)