Effect estimates, 95% confidence intervals and p-values from the linear random effects model for the effect of retainer type on arch dimensions adjusted for time.
| Covariate . | Coef. . | 95% Conf. Interval . | P value . | Coef. . | 95% Conf. Interval . | P value . | Coef. . | 95% Conf. Interval . | P value . | Coef. . | 95% Conf. Interval . | P value . |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Irregularity Index . | 3–3 . | 4–4 buccal . | 4–4 lingual . | |||||||||
| Retainer | ||||||||||||
| RT | reference | reference | reference | reference | ||||||||
| RB | 0.11 | (−.04 to .26) | .15 | 0.13 | (−.45 to 0.72) | .65 | −.07 | (−.63 to .50) | .82 | −.03 | (−.59 to .53) | .924 |
| Time | ||||||||||||
| 1 | 0 | 0 | 0 | 0 | ||||||||
| 2 | 0.03 | (−.01 to .07) | .16 | −0.03 | (−.07 to .00) | .08 | −.08 | (−.16 to -.00) | .04 | −.14 | (−.22 to -.07) | <.001 |
| 3 | 0.03 | (−.01 to .07) | .17 | −0.07 | (−.11 to -.03) | <.001 | −.12 | (−.20 to −.04) | <.01 | −.18 | (−.25 to −.10) | <.001 |
| 4 | 0.01 | (−.02 to .05) | .46 | −0.11 | (−.15 to −.07) | <.001 | −.19 | (−.27 to −.11) | <.001 | −.25 | (−.32 to −.17) | <.001 |
| 5 | 0.01 | (−.03 to .05) | .53 | −0.12 | (−.16 to −.09) | <.001 | −.22 | (−.30 to −.13) | <.001 | −.27 | (−.35 to −.19) | <.001 |
| 6 | 0.01 | (−.03 to .05) | .69 | −0.15 | (−.18 to −.11) | <.001 | −.27 | (−.36 to −.19) | <.001 | −.31 | (−.39 to −.24) | <.001 |
| 6–6 buccal | 6–6 lingual | 1–6 right | 1–6 left | |||||||||
| Retainer | ||||||||||||
| RT | reference | reference | reference | reference | ||||||||
| RB | −0.27 | (−1.23 to .69) | 0.58 | −0.15 | (−1.05 to .74) | .74 | −.02 | (−.52 to .48) | .95 | −.03 | (−.53 to .46) | .90 |
| Time | ||||||||||||
| 1 | 0 | 0 | 0 | 0 | ||||||||
| 2 | −0.41 | (−.50 to −.31) | <.001 | −0.42 | (−.51 to −.32) | <.001 | .00 | (−.04 to .04) | .89 | −.05 | (−.15 to .06) | .37 |
| 3 | −0.47 | (−.57 to −.38) | <.001 | −0.50 | (−.59 to −.40) | <.001 | .00 | (−.04 to .05) | .82 | −.05 | (−.15 to .06) | .36 |
| 4 | −0.56 | (−.66 to −.46) | <.001 | −0.60 | (−.70 to −.51) | <.001 | −.01 | (−.05 to .04) | .72 | −.07 | (−.17 to .04) | .23 |
| 5 | −0.61 | (−.71 to −.51) | <.001 | −0.64 | (−.74 to −.54) | <.001 | −.02 | (−.07 to 0.02) | .33 | −.06 | (−.16 to .05) | .32 |
| 6 | −0.69 | (−.80 to −.59) | <.001 | −0.72 | (−.82 to −.62) | <.001 | −.07 | (−.12 to −.03) | .001 | −.19 | (−.30 to −.08) | .001 |
| Covariate . | Coef. . | 95% Conf. Interval . | P value . | Coef. . | 95% Conf. Interval . | P value . | Coef. . | 95% Conf. Interval . | P value . | Coef. . | 95% Conf. Interval . | P value . |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Irregularity Index . | 3–3 . | 4–4 buccal . | 4–4 lingual . | |||||||||
| Retainer | ||||||||||||
| RT | reference | reference | reference | reference | ||||||||
| RB | 0.11 | (−.04 to .26) | .15 | 0.13 | (−.45 to 0.72) | .65 | −.07 | (−.63 to .50) | .82 | −.03 | (−.59 to .53) | .924 |
| Time | ||||||||||||
| 1 | 0 | 0 | 0 | 0 | ||||||||
| 2 | 0.03 | (−.01 to .07) | .16 | −0.03 | (−.07 to .00) | .08 | −.08 | (−.16 to -.00) | .04 | −.14 | (−.22 to -.07) | <.001 |
| 3 | 0.03 | (−.01 to .07) | .17 | −0.07 | (−.11 to -.03) | <.001 | −.12 | (−.20 to −.04) | <.01 | −.18 | (−.25 to −.10) | <.001 |
| 4 | 0.01 | (−.02 to .05) | .46 | −0.11 | (−.15 to −.07) | <.001 | −.19 | (−.27 to −.11) | <.001 | −.25 | (−.32 to −.17) | <.001 |
| 5 | 0.01 | (−.03 to .05) | .53 | −0.12 | (−.16 to −.09) | <.001 | −.22 | (−.30 to −.13) | <.001 | −.27 | (−.35 to −.19) | <.001 |
| 6 | 0.01 | (−.03 to .05) | .69 | −0.15 | (−.18 to −.11) | <.001 | −.27 | (−.36 to −.19) | <.001 | −.31 | (−.39 to −.24) | <.001 |
| 6–6 buccal | 6–6 lingual | 1–6 right | 1–6 left | |||||||||
| Retainer | ||||||||||||
| RT | reference | reference | reference | reference | ||||||||
| RB | −0.27 | (−1.23 to .69) | 0.58 | −0.15 | (−1.05 to .74) | .74 | −.02 | (−.52 to .48) | .95 | −.03 | (−.53 to .46) | .90 |
| Time | ||||||||||||
| 1 | 0 | 0 | 0 | 0 | ||||||||
| 2 | −0.41 | (−.50 to −.31) | <.001 | −0.42 | (−.51 to −.32) | <.001 | .00 | (−.04 to .04) | .89 | −.05 | (−.15 to .06) | .37 |
| 3 | −0.47 | (−.57 to −.38) | <.001 | −0.50 | (−.59 to −.40) | <.001 | .00 | (−.04 to .05) | .82 | −.05 | (−.15 to .06) | .36 |
| 4 | −0.56 | (−.66 to −.46) | <.001 | −0.60 | (−.70 to −.51) | <.001 | −.01 | (−.05 to .04) | .72 | −.07 | (−.17 to .04) | .23 |
| 5 | −0.61 | (−.71 to −.51) | <.001 | −0.64 | (−.74 to −.54) | <.001 | −.02 | (−.07 to 0.02) | .33 | −.06 | (−.16 to .05) | .32 |
| 6 | −0.69 | (−.80 to −.59) | <.001 | −0.72 | (−.82 to −.62) | <.001 | −.07 | (−.12 to −.03) | .001 | −.19 | (−.30 to −.08) | .001 |
Effect estimates, 95% confidence intervals and p-values from the linear random effects model for the effect of retainer type on arch dimensions adjusted for time.
| Covariate . | Coef. . | 95% Conf. Interval . | P value . | Coef. . | 95% Conf. Interval . | P value . | Coef. . | 95% Conf. Interval . | P value . | Coef. . | 95% Conf. Interval . | P value . |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Irregularity Index . | 3–3 . | 4–4 buccal . | 4–4 lingual . | |||||||||
| Retainer | ||||||||||||
| RT | reference | reference | reference | reference | ||||||||
| RB | 0.11 | (−.04 to .26) | .15 | 0.13 | (−.45 to 0.72) | .65 | −.07 | (−.63 to .50) | .82 | −.03 | (−.59 to .53) | .924 |
| Time | ||||||||||||
| 1 | 0 | 0 | 0 | 0 | ||||||||
| 2 | 0.03 | (−.01 to .07) | .16 | −0.03 | (−.07 to .00) | .08 | −.08 | (−.16 to -.00) | .04 | −.14 | (−.22 to -.07) | <.001 |
| 3 | 0.03 | (−.01 to .07) | .17 | −0.07 | (−.11 to -.03) | <.001 | −.12 | (−.20 to −.04) | <.01 | −.18 | (−.25 to −.10) | <.001 |
| 4 | 0.01 | (−.02 to .05) | .46 | −0.11 | (−.15 to −.07) | <.001 | −.19 | (−.27 to −.11) | <.001 | −.25 | (−.32 to −.17) | <.001 |
| 5 | 0.01 | (−.03 to .05) | .53 | −0.12 | (−.16 to −.09) | <.001 | −.22 | (−.30 to −.13) | <.001 | −.27 | (−.35 to −.19) | <.001 |
| 6 | 0.01 | (−.03 to .05) | .69 | −0.15 | (−.18 to −.11) | <.001 | −.27 | (−.36 to −.19) | <.001 | −.31 | (−.39 to −.24) | <.001 |
| 6–6 buccal | 6–6 lingual | 1–6 right | 1–6 left | |||||||||
| Retainer | ||||||||||||
| RT | reference | reference | reference | reference | ||||||||
| RB | −0.27 | (−1.23 to .69) | 0.58 | −0.15 | (−1.05 to .74) | .74 | −.02 | (−.52 to .48) | .95 | −.03 | (−.53 to .46) | .90 |
| Time | ||||||||||||
| 1 | 0 | 0 | 0 | 0 | ||||||||
| 2 | −0.41 | (−.50 to −.31) | <.001 | −0.42 | (−.51 to −.32) | <.001 | .00 | (−.04 to .04) | .89 | −.05 | (−.15 to .06) | .37 |
| 3 | −0.47 | (−.57 to −.38) | <.001 | −0.50 | (−.59 to −.40) | <.001 | .00 | (−.04 to .05) | .82 | −.05 | (−.15 to .06) | .36 |
| 4 | −0.56 | (−.66 to −.46) | <.001 | −0.60 | (−.70 to −.51) | <.001 | −.01 | (−.05 to .04) | .72 | −.07 | (−.17 to .04) | .23 |
| 5 | −0.61 | (−.71 to −.51) | <.001 | −0.64 | (−.74 to −.54) | <.001 | −.02 | (−.07 to 0.02) | .33 | −.06 | (−.16 to .05) | .32 |
| 6 | −0.69 | (−.80 to −.59) | <.001 | −0.72 | (−.82 to −.62) | <.001 | −.07 | (−.12 to −.03) | .001 | −.19 | (−.30 to −.08) | .001 |
| Covariate . | Coef. . | 95% Conf. Interval . | P value . | Coef. . | 95% Conf. Interval . | P value . | Coef. . | 95% Conf. Interval . | P value . | Coef. . | 95% Conf. Interval . | P value . |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Irregularity Index . | 3–3 . | 4–4 buccal . | 4–4 lingual . | |||||||||
| Retainer | ||||||||||||
| RT | reference | reference | reference | reference | ||||||||
| RB | 0.11 | (−.04 to .26) | .15 | 0.13 | (−.45 to 0.72) | .65 | −.07 | (−.63 to .50) | .82 | −.03 | (−.59 to .53) | .924 |
| Time | ||||||||||||
| 1 | 0 | 0 | 0 | 0 | ||||||||
| 2 | 0.03 | (−.01 to .07) | .16 | −0.03 | (−.07 to .00) | .08 | −.08 | (−.16 to -.00) | .04 | −.14 | (−.22 to -.07) | <.001 |
| 3 | 0.03 | (−.01 to .07) | .17 | −0.07 | (−.11 to -.03) | <.001 | −.12 | (−.20 to −.04) | <.01 | −.18 | (−.25 to −.10) | <.001 |
| 4 | 0.01 | (−.02 to .05) | .46 | −0.11 | (−.15 to −.07) | <.001 | −.19 | (−.27 to −.11) | <.001 | −.25 | (−.32 to −.17) | <.001 |
| 5 | 0.01 | (−.03 to .05) | .53 | −0.12 | (−.16 to −.09) | <.001 | −.22 | (−.30 to −.13) | <.001 | −.27 | (−.35 to −.19) | <.001 |
| 6 | 0.01 | (−.03 to .05) | .69 | −0.15 | (−.18 to −.11) | <.001 | −.27 | (−.36 to −.19) | <.001 | −.31 | (−.39 to −.24) | <.001 |
| 6–6 buccal | 6–6 lingual | 1–6 right | 1–6 left | |||||||||
| Retainer | ||||||||||||
| RT | reference | reference | reference | reference | ||||||||
| RB | −0.27 | (−1.23 to .69) | 0.58 | −0.15 | (−1.05 to .74) | .74 | −.02 | (−.52 to .48) | .95 | −.03 | (−.53 to .46) | .90 |
| Time | ||||||||||||
| 1 | 0 | 0 | 0 | 0 | ||||||||
| 2 | −0.41 | (−.50 to −.31) | <.001 | −0.42 | (−.51 to −.32) | <.001 | .00 | (−.04 to .04) | .89 | −.05 | (−.15 to .06) | .37 |
| 3 | −0.47 | (−.57 to −.38) | <.001 | −0.50 | (−.59 to −.40) | <.001 | .00 | (−.04 to .05) | .82 | −.05 | (−.15 to .06) | .36 |
| 4 | −0.56 | (−.66 to −.46) | <.001 | −0.60 | (−.70 to −.51) | <.001 | −.01 | (−.05 to .04) | .72 | −.07 | (−.17 to .04) | .23 |
| 5 | −0.61 | (−.71 to −.51) | <.001 | −0.64 | (−.74 to −.54) | <.001 | −.02 | (−.07 to 0.02) | .33 | −.06 | (−.16 to .05) | .32 |
| 6 | −0.69 | (−.80 to −.59) | <.001 | −0.72 | (−.82 to −.62) | <.001 | −.07 | (−.12 to −.03) | .001 | −.19 | (−.30 to −.08) | .001 |
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