Outcome-Based Quality Control by a Dental Reference Profile of a Population-Based Study (SHIP-0)
Table 3
Multivariable negative binomial regression model evaluating effects of dental practice and age (including interaction between both) on the number of missing teeth (dependent variable).
IRR (95% CI)
value
Age
2.16 (2.10; 2.22)
<0.001
Dental practice (reference SHIP)
Dental practice A
0.67 (0.59; 0.76)
<0.001
Dental practice B
0.43 (0.38; 0.50)
<0.001
Dental practice C
0.37 (0.32; 0.43)
<0.001
Dental practice D
0.47 (0.41; 0.54)
<0.001
Dental practice E
0.38 (0.33; 0.43)
<0.001
Dental practice F
0.47 (0.41; 0.53)
<0.001
Dental practice G
0.63 (0.55; 0.73)
<0.001
Interaction terms between age and dental practice
Age × dental practice A
1.12 (0.98; 1.28)
0.088
Age × dental practice B
1.30 (1.13; 1.50)
<0.001
Age × dental practice C
1.06 (0.92; 1.23)
0.428
Age × dental practice D
1.25 (1.09; 1.43)
0.001
Age × dental practice E
1.15 (1.00; 1.32)
0.053
Age × dental practice F
1.05 (0.91; 1.20)
0.530
Age × dental practice G
1.16 (1.00; 1.38)
0.053
Age was -standardized and modelled continuously. IRR: incidence-rate ratio; CI: confidence interval. Pseudo .
