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                            Library & Multimedia
 Predicting alternate light absorption in areas of trauma based on degree of skin pigmentation: Not all wavelengths are equal
NCJ Number
              305160
Journal

*Forensic Science International* Volume: 339 Dated: October 2022
Author(s)
          Katherine N. Scafide;
                        Nancy R. Downing;
                        Nesibe S. Kutahyalioglu;
                        Daniel J. Sheridan;
                        Neil E. Langlois;
                        Matthew J. Hayat
Date Published

October 2022
Annotation
              The purpose of this secondary data analysis was to determine whether use of an alternate light source (ALS) increased the predictive probability of successfully detecting bruises on diverse skin tones following a history of physical trauma.
Abstract
              In this study, data were analyzed from a convenience sample of 157 subjects inclusive of six skin tones (very light, light, intermediate, tan, brown, dark) with induced bruises. Bruises were assessed under white light and an ALS 21 times over four weeks using 10 different ALS wavelength and goggle color combinations. Data analyzed included 31,841 skin observations obtained over 2897 participant assessments. Multilevel modeling was used to account for the correlation among the repeated measurements for each bruise. Across all categories of skin pigmentation, ALS wavelengths 415 nm and 450 nm viewed through a yellow filter had the most frequent detections of bruises (415 nm: n = 2777, 11.2%; 450 nm: n = 2747, 11.1%) and greater predictive probability of a positive finding (415 nm: 0.90–0.99; 450 nm: 0.85–0.99) than white light (n = 2487; 10%; 0.81–0.90). These two ALS wavelengths were the only combinations that provided greater probability of detection than white light on groups with darker skin (brown or dark), whereas additional ALS wavelengths/filters worked equally well on groups with lighter skin. Findings suggest use of an ALS in clinical assessments of patients of color who report IPV may help reduce health and criminal justice-related disparities. (Publisher abstract provided)
      
  
          Additional Details
Grant Number(s)
        2016-DN-BX-0147


  
  
        
  Agencies
        NIJ-Sponsored


  
  
        
  Publication Type
        Research (Applied/Empirical)


  
  
        
  Award
        Analysis of Alternative Light in the Detection and Visibility of Cutaneous Bruises
    
  
  
Date Published: October 1, 2022
    
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                Evidence analysis and processing
        Domestic assault
        Blunt force trauma injuries
        Lighting
        Skin color



  
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