Table 1.
Random error (Dahlberg formula) and systematic error (t test)
| Variable | 1st Tracing | 2nd Tracing | Dahlberg | p |
|---|---|---|---|---|
| Mean ± SD | Mean ± SD | |||
| 1.NA | 24.62 ± 4.52 | 25.16 ± 4.20 | 1.410 | 0.518 |
| 1-NA | 5.32 ± 2.22 | 5.25 ± 2.14 | 0.510 | 0.583 |
| 1-Aperp | 6.35 ± 1.86 | 6.18 ± 1.73 | 0.422 | 0.240 |
| 1.NB | 26.36 ± 7.48 | 26.99 ± 8.09 | 0.956 | 0.032* |
| 1-NB | 5.24 ± 2.49 | 5.29 ± 2.46 | 0.347 | 0.593 |
| 1-AP | 3.47 ± 2.32 | 3.55 ± 2.34 | 0.208 | 0.258 |
| IMPA | 92.02 ± 7.94 | 92.52 ± 8.63 | 0.961 | 0.219 |
| I Line | -3.99 ± 2.52 | -4.24 ± 2.44 | 0.250 | 0.031* |
| 1.1 | 126.95 ± 10.35 | 125.81 ± 10.22 | 1.263 | 0.047* |
| Overjet | 2.82 ± 0.88 | 2.62 ± 0.72 | 0.272 | 0.011* |
| Overbite | 2.22 ± 1.26 | 2.05 ± 1.14 | 0.293 | 0.177 |
*
Significant for P < 0.05.