Table 2.
Instrumental Measurements Of Colour Parameters In Zone 2 (± Standard deviation) And Pearson Correlation Between Clinical Scoring And Colour Parameters Of Z2 In Caucasian Subjects, Calculated By Combining The Data From Subjects With And Without Dark Circles
| Instrument | Colour Parameter Z2 | Without Dark Circles | With Dark Circles | Pearson Correlation Coefficient Clinical Scoring vs Colour Measurements of Z2 |
|---|---|---|---|---|
| Chromameter | L* | 61.8±1.4 | 59.6±1.2 | r = −0.59 (p<0.05) |
| a* | 14.2±1.99 | 12.4±1.4 | ns | |
| b* | 14.2±1.6 | 15.4±1.3 | ns | |
| Spectrocolorimeter | L* | 62.4±1.1 | 60.4±1.5 | r = −0.53 (p<0.05) |
| a* | 12.3±1.1 | 11.6±1.0 | ns | |
| b* | 15.4±1.4 | 16.5±1.3 | r = 0.53 (p<0.05) | |
| VISIA Front Profile | L* | 58.6±5.2 | 49.9±6.5 | r = −0.62 (p<0.05) |
| a* | 11.5±2.9 | 14.6±2.8 | r = 0.57 (p<0.05) | |
| b* | 15.3±3.4 | 18.3±3.0 | r = 0.50 (p<0.05) |
Abbreviations: r, Pearson correlation coefficient; ns, not significant; L*, lightness; a*, red-green component; b*, yellow-blue component; Z2, Zone 2.