Autofluorescence of Human Skin is Age-Related After Correction for Skin Pigmentation and Redness  Renhua Na, Ida-Marie Stender, Mette Henriksen, Hans Christian Wulf  Journal of Investigative Dermatology  Volume 116, Issue 4, Pages 536-540 (April 2001) DOI: 10.1046/j.1523-1747.2001.01285.x Copyright © 2001 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 1 Fluorescence intensities plotted against skin pigmentation to show the correction of the fluorescence for pigmentation and redness. The regression lines indicate the trends of the fluorescence changing with pigmentation, the dotted lines indicate the 95% confidence interval of the regression lines. The fluorescence decrease with pigmentation before the corrections (○), and became independent of pigmentation after the corrections, indicating that pigmentation has no influence on the corrected fluorescence (•). Journal of Investigative Dermatology 2001 116, 536-540DOI: (10.1046/j.1523-1747.2001.01285.x) Copyright © 2001 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 2 Fluorescence intensities plotted against skin redness to show the correction of the fluorescence for pigmentation and redness. The regression lines indicate the trends of the fluorescence changing with redness, the dotted lines indicate the 95% confidence interval of the regression lines. The fluorescence decrease with redness before the corrections (○), and became independent of redness after the corrections, indicating that redness has no influence on the corrected fluorescence (•). Journal of Investigative Dermatology 2001 116, 536-540DOI: (10.1046/j.1523-1747.2001.01285.x) Copyright © 2001 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 3 The relations of the fluorescence intensities with age before and after the correction for skin pigmentation and redness. ○, before; •, after. The regression lines indicate the trends of the fluorescence changing with age, the dotted lines indicate the 95% confident interval of the regression lines. Im, measured fluorescence intensity; Ic, corrected fluorescence intensity. Journal of Investigative Dermatology 2001 116, 536-540DOI: (10.1046/j.1523-1747.2001.01285.x) Copyright © 2001 The Society for Investigative Dermatology, Inc Terms and Conditions