Table 3.
Descriptive statistics and 95% CIs for mean simple errors calculated as the gold standard (all procedures done on paper) minus fully digital (both landmarking and measurements done manually on the computer). 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 | 0.009 | 0.064 | −0.169 | −0.036 | 0.007 | 0.048 | 0.178 | −0.004 | 0.021 | 0.165 | — |
| Facial Angle | 0.119 | 0.462 | −0.856 | −0.204 | 0.201 | 0.500 | 0.881 | 0.028 | 0.210 | 0.011 | < 0.00000005 |
| A-B Plane | 0.008 | 0.046 | −0.152 | −0.019 | 0.012 | 0.038 | 0.133 | −0.001 | 0.017 | 0.072 | — |
| MP Angle | −0.003 | 0.150 | −0.306 | −0.113 | 0.006 | 0.116 | 0.303 | −0.033 | 0.026 | 0.835 | — |
| NSG | −0.103 | 0.642 | −1.079 | −0.683 | −0.183 | 0.442 | 1.048 | −0.229 | 0.024 | 0.111 | — |
| OP cant | −0.011 | 0.060 | −0.230 | −0.051 | −0.015 | 0.026 | 0.123 | −0.023 | 0.001 | 0.064 | — |
| Interincisal Angle | 0.057 | 0.708 | −1.346 | −0.510 | 0.092 | 0.676 | 1.315 | −0.083 | 0.197 | 0.423 | — |
| L1 ^ OP | 0.020 | 0.672 | −1.104 | −0.622 | 0.078 | 0.515 | 1.128 | −0.112 | 0.153 | 0.763 | — |
| L1 ^ MP | −0.022 | 0.516 | −0.992 | −0.427 | −0.092 | 0.415 | 0.877 | −0.124 | 0.080 | 0.666 | — |
| U1 Protrusion | −0.001 | 0.046 | −0.095 | −0.037 | −0.001 | 0.032 | 0.108 | −0.010 | 0.008 | 0.861 | — |
| SNA | −0.058 | 0.479 | −0.772 | −0.488 | −0.075 | 0.299 | 0.811 | −0.153 | 0.036 | 0.224 | — |
| SNB | 0.023 | 0.424 | −0.732 | −0.353 | 0.004 | 0.336 | 0.742 | −0.061 | 0.106 | 0.591 | — |
| ANB | 0.005 | 0.051 | −0.133 | −0.030 | 0.001 | 0.037 | 0.195 | −0.005 | 0.015 | 0.348 | — |
| OP-S-N | −0.023 | 0.105 | −0.250 | −0.087 | −0.026 | 0.050 | 0.182 | −0.044 | −0.002 | 0.032 | < 0.00000005 |
| MP-S-N | −0.009 | 0.217 | −0.417 | −0.172 | −0.035 | 0.169 | 0.441 | −0.052 | 0.034 | 0.681 | — |
| U1-N-A | −0.022 | 0.134 | −0.396 | −0.105 | −0.012 | 0.070 | 0.290 | −0.048 | 0.005 | 0.108 | — |
| L1-N-B | 0.030 | 0.170 | −0.374 | −0.097 | 0.032 | 0.160 | 0.339 | −0.003 | 0.064 | 0.078 | — |
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.