Table 4. Coefficients of the MXL model.
| Mixed logit model (MXL) | ||||||||
|---|---|---|---|---|---|---|---|---|
| Posterior teeth | ||||||||
| Attributes (Ref. negative levels) | Levels | Coef. | Std. Err. | t-value (z) | p-value (P>|z|) | [95% Conf. interval] | Sig. | |
| Aesthetics | strongly visible–reference level | |||||||
| lightly visible | 0.687 | 0.103 | 6.680 | 0.000 | 0.485 | 0.888 | *** | |
| natural color | 1.290 | 0.113 | 11.410 | 0.000 | 1.068 | 1.512 | *** | |
| Compatibility | 1 out of 10,000 people with allergic or local toxic reaction–reference level | |||||||
| no risk | 0.465 | 0.086 | 5.400 | 0.000 | 0.296 | 0.634 | *** | |
| Durability | 5 years–reference level | |||||||
| 10 years | 0.159 | 0.121 | 1.310 | 0.189 | -0.078 | 0.395 | ||
| 15 years | 0.477 | 0.112 | 4.270 | 0.000 | 0.258 | 0.695 | *** | |
| 25 years | 1.540 | 0.140 | 11.000 | 0.000 | 1.266 | 1.815 | *** | |
| Out-of-pocket payment | 600 €–reference level | |||||||
| 450 € | 0.191 | 0.113 | 1.690 | 0.091 | -0.030 | 0.411 | * | |
| 150 € | 0.965 | 0.107 | 9.000 | 0.000 | 0.755 | 1.175 | *** | |
| 50 € | 0.776 | 0.130 | 5.960 | 0.000 | 0.521 | 1.031 | *** | |
| Log likelihood | -2,569.2494 (Iteration 8) | |||||||
| Prob > chi2 | 0.0 | |||||||
| LR chi2(9) | 459.8 | |||||||
| No. of observations | 9,039 | |||||||
AIC / BIC (Akaike’s & Schwarz’s Bayesian information criteria): 5,176 / 5,312
*** p < .01,
** p < .05,
* p < .1