Table 2. Mean differences and correlation between FA-GALL and FA-GVL distances.
| Groups | Distance | n | Mean (mm) | SD | Mean difference (FA-GALL) - (FA-GVL)/GALL-GVL distance | SD of the mean difference | 95% Confidence Interval of the difference | P value | Spearman correlation coefficient | 95% Confidence Interval of the correlation | P value | |
| Total | FA-GALL | 129 | 0,09 | 4,78 | 0.54 | 1.14 | (0.34-0.74) | <0.001ⱡ | 0.983 | (0.976 -0.988) | <0.001* | |
| FA-GVL | 129 | -0,44 | 5.26 | |||||||||
| Sex | Female | FA-GALL | 67 | -0,28 | 5,08 | 0,64 | 1,25 | (0.33-0.94) | <0.001ⱡ | 0.981 | (0.969-0.988) | <0.001* |
| FA-GVL | 67 | -0,92 | 5,63 | |||||||||
| Male | FA-GALL | 62 | 0,5 | 4,43 | 0,44 | 0,99 | (0.18-0.70) | <0.001ⱡ | 0.993 | (0.972-0.990) | <0.001* | |
| FA-GVL | 62 | 0,86 | 4,83 | |||||||||
| Age groups | 18 to 21 years | FA-GALL | 87 | -0,3 | 4,81 | 0,56 | 1,13 | (0.31-0.80) | <0.001ⱡ | 0.980 | (0.969 -0.987) | <0.001* |
| FA-GVL | 87 | -0,86 | 5,3 | |||||||||
| 22 to 24 years | FA-GALL | 42 | 0,91 | 4,66 | 0.51 | 1,16 | (0.15-0.87) | 0.002ⱡ | 0.986 | (0.975 -0.993) | <0.001* | |
| FA-GVL | 42 | 0,4 | 5,16 | |||||||||
FA = facial axis of the central upper incisor; GALL = Goal anterior-limit line; GVL = glabellar vertical line; FA-GALL = distance from FA to GALL; FA-GVL = distance from FA to GVL; SD = standard deviation. ⱡWilcoxon signed-ranks test, significant at P <0.01. *Significant at P <0.01.