Table 2 Comparison of linear and non-linear fractional polynomial regression models for dental caries
Degree of freedom | Deviance | Res. SD | Deviance difference | p values | Powers | |
|---|---|---|---|---|---|---|
Prevalence of dental caries (% d3mft > 0) | ||||||
Linear | 1 | 2066.51 | 7.43 | 1.75 | 0.627 | 1 |
m = 1 | 2 | 2066.33 | 7.43 | 1.57 | 0.46 | 0.5 |
m = 2 | 4 | 2064.76 | 7.42 | – | – | − 2, − 1 |
Mean dmft score (Decayed, missing, filled teeth) | ||||||
Linear | 1 | 192.23 | 0.33 | 1.57 | 0.669 | 1 |
m = 1 | 2 | 192.23 | 0.33 | 1.57 | 0.461 | 1 |
m = 2 | 4 | 190.66 | 0.33 | – | – | − 2, − 1 |