Table 6 Parameters of regression models and the impact of unit changes in individual variables on the expected number of patients (%) for the compared OHIP-14 models
Independent variables | P | NB | ZIP | ZINB | ||
|---|---|---|---|---|---|---|
e1: Y > 0 | e2: Y = 0 | e1: Y > 0 | e2: Y = 0 | |||
Gender | - | - | 0.237 (26.8%) | - | 0.271 (31.1%) | - |
Age | - | - | -0.018 (-1.8%) | - | -0.025 (-2.5%) | - |
Income | - | - | 0.116 (12.3%) | - | - | - |
Number of comorbidities | 0.098 (10.3%) | - | - | - | - | - |
Asthma | 0.404 (49.8%) | - | 0.158 (17.2%) | -0.935 (60.7%) | - | -0.988 (-62.8%) |
Gastroesophageal reflux disease | 1.381 (298.3%) | - | 0.380 (46.3%) | -0.710 (50.8%) | - | -0.765 (-53.4%) |
Oral treatment need | 0.157 (16.9%) | - | 0.185 (20.4%) | - | 0.278 (32.0%) | |
Number of decayed teeth | 0.049 (5.0%) | 0.036 (3.6%) | - | - | - | |
Number of missing teeth | 0.048 (4.9%) | 0.041 (4.2%) | 0.050 (5.1%) | - | 0.053 (5.4%) | - |
Likelihood ratio test | < 0.001 | 0.002 | < 0.001 | < 0.001 | ||
Sum of squared deviations | 87,879 | 89,349 | 87,735 | 87,358 | ||