Table 4 Multiple linear regression model followed by the stepwise method
From: The impact of COVID-19 pandemic on total treatment time of fixed appliances
Independent variables | Univariate model | Multiple Model | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Multiple | Stepwise | ||||||||||||
p-value | Adjusted p-value | CI 95% | Β value | R2 | Adjusted R2 | F test | p-value of multiple model | p-value of variables | R2 | AdjustedR2 | p-value of multiple model | ||
Lower | Upper | ||||||||||||
Absences/missed appointments | < 0.001** | – | – | – | – | – | – | – | |||||
Operator | < 0.001** | < 0.001** | 5.64 | 15.22 | 10.42 | < 0.001* | 0.24 | 0.23 | < 0.001** | ||||
Sex | 0.04* | 0.03* | 0.25 | 9.29 | 4.77 | 0.30 | 0.26 | 8.43 | < 0.001** | 0.04* | 0.30 | 0.27 | < 0.001** |
Treatment before/during the pandemic | 0.31 | 0.94 | − 4.76 | 4.45 | − 0.15 | 0.94 | 0.30 | 0.26 | < 0.001** | ||||
Months of treatment during the pandemic | 0.63 | ||||||||||||
Missing teeth | 0.67 | ||||||||||||
Age T0 | 0.81 | ||||||||||||
PAR T0 | 0.87 | ||||||||||||
Debonds/breakages | 0.71 | ||||||||||||