U.S. flag
      An official website of the United States government, Department of Justice.
        Here's how you know
      Here's how you know**Official websites use .gov**
            
            A **.gov** website belongs to an official government organization in the United States.
      **Secure .gov websites use HTTPS**
            
            A **lock** (
            A locked padlock
            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites. Menu

      
        close

            
            
                                              About NIJ
        
                    
  
          About NIJ
      
    
          The NIJ Director
          How NIJ Is Organized
          Mission and Guiding Principles
          Research and Development Process
          Strategic Framework
          Assessments of NIJ
          Annual Reports & Reports to Congress
          Staff Directory
          Funding & Awards
        
                    
  
          Funding & Awards
      
    
          Current Funding
          Forthcoming Funding
          Expired Funding
          Awards: Listing of Funded Projects
          Guidance for Applicants and Awardees
          Fellowship & Student Programs
          Travel Scholarships
          NIJ Challenge Program
          Library & Multimedia
        
                    
  
          Library & Multimedia
      
    
          NIJ Journal
          Podcasts
          Publications Listing
          Multimedia Listing
          Rated Practices on CrimeSolutions
          Rated Programs on CrimeSolutions
          Software & Databases
          Datasets
          Patents
          Topics
        
                    
  
          Topics
      
    
          Article Listing
          Corrections
          Courts
          Crime Prevention
          Crimes
          Drugs and Crime
          Equipment and Technology
          Forensic Sciences
          Youth Justice
          Justice System Reform
          Law Enforcement
          Tribal Crime and Justice
          Victims of Crime
          Events
        
                    
  
          Events
      
    
          NIJ 2024 Research Conference
          Scheduled Events
          On-Demand Events
          Research Meetings & Workshops
          NIJ-Hosted Online Training

                            
                                About
          Contact Us
          Subscribe
          Topics A-Z
                  Share
FacebookXLinkedInRedditPinterestEmail Home
                            Library & Multimedia
 QUANTITATIVE ACID PHOSPHATASE TEST - A STATISTICAL ANALYSIS OF ENDOGENOUS AND POSTCOITAL ACID PHOSPHATASE LEVELS IN THE VAGINA
NCJ Number
              57024

Author(s)
          G F SENSABAUGH
Date Published

January 1979
Length
              20 pages
Annotation
              TO PROVIDE GUIDELINES FOR THE INTERPRETATION OF ACID PHOSPHATASE (ACP) TESTS IN CASES OF SEXUAL ASSAULT, DATA FROM FOUR PUBLISHED AND ONE UNPUBLISHED STUDY ARE ANALYZED TO DEFINE ENDOGENOUS AND POSTCOITAL ACP LEVELS.
Abstract
              THE STUDIES USE DIFFERENT METHODS AND DIFFERENT MEASUREMENTS, AND THEREFORE, ARE NOT DIRECTLY COMPARABLE. THE DATA WERE STANDARDIZED TO FACTOR OUT UNIT AND SCALE DIFFERENCES, LEAVING A LARGE BODY OF DATA ON MEASUREMENTS OF ACP LEVEL IN THE VAGINA. THE STATISTICAL TECHNIQUES USED ARE DESCRIBED IN DETAIL. THE RESULT WAS 130 DATA POINTS FROM STUDIES OF ENDOGENOUS ACP LEVELS IN THE VAGINA AND 178 DATA POINTS FOR POSTCOITAL VALUES. WHEN THE FIVE SETS OF STANDARDIZED DATA FOR ENDOGENOUS ACP LEVELS ARE PLOTTED CUMULATIVELY ON LOG PROBABILITY COORDINATES, ALMOST ALL THE DATA POINTS FALL WITHIN A NARROW BAND. VALUES LYING OUTSIDE THE BAND REPRESENT LOW ACP LEVELS. TABLES ANALYZE THESE DATA AND GIVE STANDARDIZED SIGNIFICANT THRESHOLDS FOR VAGINAL ACP DISTRIBUTION. THE POSTCOITAL DATA INDICATES THAT THE LEVEL OF ACP CAN BE DESCRIBED BY A LOGNORMAL DISTRIBUTION FUNCTION. THE DECLINE IN RECOVERABLE ACP ACTIVITY IS ILLUSTRATED BOTH GRAPHICALLY AND IN DATA TABLES WHILE WHOLE SEMEN AND VAGINAL ACP LEVELS ARE PROVIDED FOR REFERENCE. DURING THE FIRST 3 HOURS AFTER COITUS, THE ACP LEVEL RAPIDLY DROPS FROM VALUES IN THE WHOLE SEMEN RANGE TO VALUES INDICATING AS MUCH AS 99 PERCENT LOSS.  THE INITIAL LOSS THEN BEGINS TO LEVEL OFF. AT 10 HOURS, THE MEAN LEVEL IS ABOUT 5 PERCENT OF EJACULATE WITH THE RATE OF DECAY BECOMING MORE GRADUAL (WITH A HALF LIFE OF ABOUT 70 HOURS). THESE VALUES PROVIDE INFORMATION POTENTIALLY USEFUL FOR ANALYSIS OF INDIVIDUAL CASES. THE PAPER CONTAINS EXTENSIVE TECHNICAL DISCUSSION AND A BIBLIOGRAPHY. (GLR)
      
  
          Additional Details
Agencies
        NIJ-Sponsored
    
  
  
Date Published: January 1, 1979
    
          Downloads
        
                      *No download available*

Side navigation
  

        

  
  
              NIJ Journal
    
      
            
            
            
      Podcasts
    
      
            
            
            
      Publications Listing
    
      
            
            
            
      Multimedia Listing
    
      
            
            
            
      Rated Practices on CrimeSolutions
    
      
            
            
            
      Rated Programs on CrimeSolutions
    
      
            
            
            
      Software & Databases
    
      
            
            
            
      Datasets
    
      
            
            
            
      PatentsRelated Topics
        
                Statistical analysis
        Data points
        Sexual assault



  
Similar Publications
        
                      Are Men Reluctant to Assault Women Even When Intoxicated?
                  Criminal Investigative Effort in Sexual Assaults: Findings from a Sample of Cases with Unsubmitted Sexual Assault Kits
                  Estimating Age of Death from Subadult Remains (Part Two)
 Top

      National Institute of Justice

        
        
                        About NIJ
                    About NIJ
      
    
                  How NIJ Is Organized
      
    
                  NIJ Director
      
    
                  Research Disclaimer
      
    
                  Funding & Awards
                    Funding & Awards Home
      
    
                  Awards Listing
      
    
                  Current Funding
      
    
                  Guidance for Applicants and Awardees
      
    
                  Resources
                    Events
      
    
                  Podcasts
      
    
                  Publications
      
    
                  Topics
      
    
                  Multimedia
      
    
                  Reuse Policy
      
    
                  Contacts
                    Contact NIJ
      
    
                  Staff Directory
      
    
                  Submit a FOIA Request
      
    
                  File a Civil Rights ComplaintFacebook
          
                      X
          
                      YouTube
  

      810 7th St. NW, Washington, D.C. 20531
      
              Secondary Footer link menu
            Accessibility
              Plain Language
              Privacy Policy
              Legal Policies and Disclaimer
              No FEAR Act
              Freedom of Information Act
              USA.gov
              Justice.gov