Table 1.
Descriptive statistics for tracing measurements performed via the three methods. The number of samples per row is 101 (n = 101).
| Measurement | Everything on paper | Everything on screen | Landmarking on paper | |||
|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | Mean | SD | |
| N-A-Pog | −5.479 | 6.864 | −5.488 | 6.879 | −5.484 | 6.774 |
| Facial angle | 87.793 | 3.806 | 87.674 | 3.732 | 87.691 | 3.737 |
| A-B plane | −6.357 | 3.590 | −6.366 | 3.587 | −6.293 | 3.704 |
| MP angle | 24.552 | 5.109 | 24.556 | 5.100 | 24.590 | 5.151 |
| NSG | 110.021 | 3.979 | 110.123 | 3.886 | 110.092 | 3.915 |
| OP cant | 7.850 | 4.046 | 7.862 | 4.027 | 7.931 | 4.124 |
| Interincisal angle | 126.262 | 10.051 | 126.206 | 10.148 | 126.556 | 9.935 |
| L1 ^ OP | 113.563 | 7.318 | 113.543 | 7.342 | 113.354 | 7.520 |
| L1 ^ MP | 83.370 | 7.636 | 83.393 | 7.673 | 83.551 | 7.794 |
| U1 protrusion | 5.275 | 2.396 | 5.276 | 2.390 | 5.978 | 2.725 |
| SNA | 79.634 | 3.330 | 79.692 | 3.233 | 79.653 | 3.246 |
| SNB | 76.263 | 3.675 | 76.241 | 3.591 | 76.210 | 3.637 |
| ANB | −3.447 | 3.059 | −3.451 | 3.050 | −3.443 | 3.014 |
| OP-S-N | 18.121 | 4.457 | 18.144 | 4.473 | 18.262 | 4.599 |
| MP-S-N | 35.070 | 5.780 | 35.079 | 5.775 | 35.167 | 5.836 |
| U1-N-A | 22.394 | 7.167 | 22.416 | 7.185 | 22.175 | 7.102 |
| L1-N-B | 27.957 | 6.614 | 27.927 | 6.587 | 27.826 | 6.722 |
Note: Everything on paper refers to the fully conventional gold standard, where both landmarking and tracing have been performed conventionally on the tracing paper. Landmarking on paper refers to the semidigital method, in which landmarking is done on paper, and then, landmark coordinates are used by the program to calculate the measurements. Everything on screen refers to the fully digital method, in which the landmarking was done by the operator on the screen, and from their coordinates, the software calculated the measurements.
Abbreviations: OP, occlusal plane; SD, standard deviation.