Table 5.

Latent class model

Attributes and levels	Class 1 coefficient (95% CI)	P-value	Class 2 coefficient (95% CI)	P-value
Probability of class	0.633 (0.565, 0.701)	<0.001	0.367 (0.299, 0.435)	<0.001
Tooth loss within next 10 years
No tooth loss (reference)
1 tooth lost	−2.271 (−2.762, −1.781)	<0.001	−0.673 (−0.907, −0.438)	<0.001
2 teeth lost	−4.980 (−5.812, −4.148)	<0.001	−1.482 (−1.757, −1.208)	<0.001
Own costs for treatment, follow-up care and re-treatment per year
Per 1€	0.001 (0.0003, 0.002)	0.005	−0.002 (−0.003, −0.002)	<0.001
Complaints and symptoms
No complaints (reference)
Occasional gum bleeding	−0.061 (−0.667, 0.544)	0.842	0.089 (−0.164, 0.345)	0.4914
“Long teeth” due to gum recession	−1.698 (−2.338, −1.058)	<0.001	−0.947 (−1.2117, −0.682)	<0.001
Sensitive tooth neck	−0.690 (−1.285, −0.094)	0.023	−0.222 (−0.464, 0.019)	0.071
Frequency of periodontist visits
None necessary (reference)
2× per year	−0.037 (−0.312, 0.238)	0.790	0.481 (0.276, 0.686)	<0.001
4× per year	−0.048 (−0.457, 0.362)	0.820	0.065 (−0.140, 0.269)	0.535

Note: Number of observations, that is, answered choice sets: 3,171; missing answers for choice sets: 33; Pseudo-R²: 0.4517, log likelihood: −1,204.99, Akaike Information Criterion: 2,444.0.

Abbreviation: CI, confidence interval.