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Correlation analysis between the ratio (495–550/550–610 nm) and the syndrome scores.
| Category | Palm of the left hand | Back of the left hand | Palm of the right hand | Back of the right hand |
|---|---|---|---|---|
| Correlation coefficient | −0.703 | −0.841 | −0.819 | −0.906 |
| p value | <0.001 | <0.001 | <0.001 | <0.001 |
