Table 6.

Descriptive statistics and 95% CIs for mean directionless errors calculated as the absolute value of the gold standard (all 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 the absolute values of 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	0.050	0.040	0.000	0.021	0.041	0.070	0.178	0.042	0.058	< 0.00000005	0.251
Facial angle	0.406	0.248	0.000	0.204	0.391	0.591	0.881	0.357	0.455	< 0.00000005	< 0.00000005
A-B plane	0.036	0.029	0.000	0.014	0.030	0.050	0.152	0.031	0.042	< 0.00000005	< 0.00000005
MP angle	0.126	0.080	0.000	0.058	0.115	0.190	0.306	0.110	0.142	< 0.00000005	< 0.00000005
NSG	0.568	0.311	0.010	0.325	0.551	0.835	1.079	0.506	0.629	< 0.00000005	< 0.00000005
OP cant	0.048	0.038	0.001	0.019	0.041	0.067	0.230	0.040	0.055	< 0.00000005	< 0.00000005
Interincisal angle	0.613	0.355	0.038	0.323	0.582	0.913	1.346	0.542	0.683	< 0.00000005	< 0.00000005
L1 ^ OP	0.582	0.332	0.017	0.283	0.565	0.900	1.128	0.516	0.648	< 0.00000005	< 0.00000005
L1 ^ MP	0.439	0.269	0.004	0.191	0.427	0.674	0.992	0.386	0.492	< 0.00000005	< 0.00000005
U1 protrusion	0.038	0.026	0.000	0.018	0.036	0.056	0.108	0.033	0.043	< 0.00000005	0.0000002
SNA	0.419	0.237	0.000	0.205	0.437	0.641	0.811	0.372	0.465	< 0.00000005	< 0.00000005
SNB	0.362	0.218	0.004	0.170	0.353	0.551	0.742	0.319	0.405	< 0.00000005	< 0.00000005
ANB	0.040	0.033	0.001	0.018	0.033	0.052	0.195	0.033	0.046	< 0.00000005	0.106
OP-S-N	0.088	0.062	0.001	0.036	0.072	0.136	0.250	0.075	0.100	< 0.00000005	< 0.00000005
MP-S-N	0.184	0.114	0.002	0.086	0.172	0.266	0.441	0.161	0.206	< 0.00000005	< 0.00000005
U1-N-A	0.107	0.082	0.000	0.046	0.093	0.155	0.396	0.091	0.124	< 0.00000005	< 0.00000005
L1-N-B	0.142	0.097	0.000	0.056	0.136	0.206	0.374	0.123	0.161	< 0.00000005	< 0.00000005

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.