Table 5 Parameters of regression models and the impact of unit changes in individual variables on the expected number of patients (%) for the compared EQ-5D models
Independent variables | P | NB | ZIP | ZINB | ||
|---|---|---|---|---|---|---|
e1: Y > 0 | e2: Y = 0 | e1: Y > 0 | e2: Y = 0 | |||
Gender | 0.256 (25.6%) | -0.258 (-22.7%) | -0.181 (16.5%) | - | - | - |
Age | 0.037 (3.7%) | 0.045 (4.6%) | 0.024 (2.4%) | -0.108 (-10.2%) | - | -0.365 (-30.6%) |
Living alone | 0.162 (16.2%) | - | - | -0.532 (-41.3%) | 0.133 (14.3%) | - |
Income | -0.318 (-31.7%) | -0.297 (-25.7%) | -0.302 (26.1%) | - | -0.348 (-29.4%) | - |
Diabetes | 0.360 (36.0%) | - | 0.276 (31.8%) | -1.023 (-64.1%) | 0.437 (54.9%) | - |
Myocardial infarction | 0.427 (42.7%) | 0.588 (80.1%) | 0.338 (40.3%) | - | 0.454 (57.7%) | - |
Heart failure | 0.351 (35.1%) | 0.322 (37.9%) | - | - | - | - |
Stroke | 0.618 (61.2%) | - | 0.459 (58.2%) | - | 0.543 (72.2%) | - |
Kidney diseases | 1.407 (140.7%) | 1.434 (319.6%) | 0.338 (40.3%) | - | 0.466 (59.4%) | - |
Hypothyroidism | 0.524 (52.4%) | - | - | - | - | - |
Number of missing teeth | 0.032 (3.2%) | 0.041 (4.2%) | - | - | - | - |
Oral dryness | 0.060 (6.0%) | - | - | - | - | - |
Likelihood ratio test | < 0.001 | 0.001 | < 0.001 | < 0.001 | ||
Sum of squared deviations | 1347 | 1460 | 1491 | 1339 | ||