Table 2.
Descriptive statistics and 95% CIs for mean simple errors calculated as the gold standard (all procedures done on paper) minus semi digital (landmarking on paper but measurements done using the software). The p values are calculated once by comparing the mean errors with zero, and if significant, then once more by comparing them with 1/100 of the means of gold standard tracing values. All measurements were significantly smaller than 2 (all p values < 0.0005). The number of samples per row is 101 (n = 101).
| Measurement | Mean | SD | Min | Q1 | Med | Q3 | Max | 95% CI | P 0 | P g o l d/100 | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| N-A-Pog | 0.004 | 0.700 | −1.661 | −0.535 | −0.059 | 0.633 | 1.474 | −0.134 | 0.143 | 0.949 | — |
| Facial angle | 0.103 | 0.581 | −1.078 | −0.336 | 0.133 | 0.478 | 1.712 | −0.012 | 0.217 | 0.079 | — |
| A-B plane | −0.065 | 0.628 | −1.395 | −0.616 | −0.057 | 0.428 | 1.025 | −0.189 | 0.059 | 0.303 | — |
| MP angle | −0.037 | 0.450 | −1.388 | −0.339 | −0.051 | 0.321 | 1.059 | −0.126 | 0.052 | 0.408 | — |
| NSG | −0.072 | 0.709 | −1.436 | −0.634 | −0.166 | 0.466 | 1.742 | −0.212 | 0.068 | 0.312 | — |
| OP cant | −0.080 | 0.654 | −1.743 | −0.488 | −0.092 | 0.349 | 1.248 | −0.209 | 0.049 | 0.221 | — |
| Interincisal angle | −0.293 | 1.315 | −3.639 | −1.114 | −0.085 | 0.631 | 2.873 | −0.553 | −0.034 | 0.027 | < 0.00000005 |
| L1 ^ OP | 0.209 | 1.204 | −3.823 | −0.592 | 0.231 | 1.018 | 2.606 | −0.028 | 0.447 | 0.084 | — |
| L1 ^ MP | −0.180 | 1.207 | −3.243 | −0.898 | −0.220 | 0.519 | 3.693 | −0.418 | 0.058 | 0.137 | — |
| U1 protrusion | −0.703 | 0.434 | −1.679 | −0.996 | −0.693 | −0.422 | 0.512 | −0.789 | −0.617 | < 0.00000005 | < 0.00000005 |
| SNA | −0.019 | 0.663 | −1.653 | −0.478 | 0.067 | 0.470 | 1.623 | −0.150 | 0.112 | 0.770 | — |
| SNB | 0.054 | 0.539 | −1.223 | −0.381 | 0.085 | 0.375 | 1.655 | −0.053 | 0.160 | 0.318 | — |
| ANB | −0.003 | 0.349 | −0.616 | −0.279 | −0.005 | 0.265 | 0.830 | −0.072 | 0.066 | 0.930 | — |
| OP-S-N | −0.142 | 0.665 | −1.797 | −0.630 | −0.117 | 0.190 | 1.528 | −0.273 | −0.010 | 0.035 | 0.0000040 |
| MP-S-N | −0.097 | 0.510 | −1.481 | −0.485 | −0.065 | 0.303 | 0.910 | −0.197 | 0.004 | 0.059 | — |
| U1-N-A | 0.219 | 0.973 | −1.959 | −0.333 | 0.314 | 0.910 | 2.699 | 0.027 | 0.411 | 0.026 | 0.962 |
| L1-N-B | 0.131 | 1.097 | −3.972 | −0.439 | 0.176 | 0.777 | 2.567 | −0.085 | 0.348 | 0.231 | — |
Note: The reference values for comparisons for the second p value column are as follows: −0.055, 0.878, −0.064, 0.246, 1.100, 0.079, 1.263, 1.136, 0.834, 0.053, 0.796, 0.763, −0.034, 0.181, 0.351, 0.224, and 0.280, respectively, for N-A-Pog, facial angle, A-B plane, MP angle, NSG, the cant of OP, Interincisal Angle, L1 ^ OP, L1 ^ MP, U1 protrusion, SNA, SNB, ANB, OP-S-N, MP-S-N, U1-N-A, and L1-N-B.
Abbreviations: CI, confidence interval based on the t distribution; Max, maximum; Med, median; Min, minimum; OP, occlusal plane; Q1, first quartile; Q3, third quartile; SD, standard deviation.