Table 3 Linear regressions with simplified plaque index or gingival index (both square root transformed) as dependent variable
Crude model | Adjusted model | |||||
|---|---|---|---|---|---|---|
Outcome | Factor | Group | b (95% CI) | P | b (95% CI) | P |
s-PlI* | Appliance | Brackets | Referent | Referent | ||
Aligners | − 1.11 (− 1.73 to − 0.48) | 0.001 | − 1.05 (− 1.55 to − 0.55) | < 0.001 | ||
Age (per year) | NT | − 0.09 (− 0.23 to 0.06) | 0.25 | |||
Gender | Female | NT | Referent | |||
Male | 0.56 (0.01 to 1.11) | 0.05 | ||||
Time | T0 | Referent | Referent | |||
T1 | − 0.59 (− 1.14 to − 0.05) | 0.03 | − 0.59 (− 1.14 to − 0.05) | 0.03 | ||
T2 | 0.04 (− 0.65 to 0.72) | 0.92 | 0.04 (− 0.65 to 0.72) | 0.92 | ||
s-PlI at T0 | NT | 0.35 (0.12 to 0.58) | 0.003 | |||
s-GI† | Appliance | Brackets | Referent | Referent | ||
Aligners | − 1.23 (− 2.01 to − 0.45) | 0.002 | − 1.16 (− 1.89 to − 0.43) | 0.002 | ||
Age (per year) | NT | NT | ||||
Gender | Female | Referent | Referent | |||
Male | NT | NT | ||||
Time | T0 | Referent | Referent | |||
T1 | − 0.09 (− 0.59 to 0.41) | 0.72 | − 0.09 (− 0.59 to 0.41) | 0.72 | ||
T2 | 0.36 (− 0.36 to 1.07) | 0.33 | 0.36 (− 0.36 to 1.07) | 0.33 | ||
s-PlI at T0 | NT | 0.34 (0.04 to 0.64) | 0.02 | |||