Medical Records
  Received Vaccine No Vaccine Correct Recallb (%) P Value
Gender-Specific Reporting       < 0.195c
Female Self-Report (n = 136)     69.1  
Received Vaccine 74 9    
No Vaccine 6 20    
Unsure 19 8    
Male Self-Report (n = 81)     60.5  
Received Vaccine 22 5    
No Vaccine 3 27    
Unsure 5 19    
Age-Specific Reporting       < 0.002d
12-14 (n = 29)     48.3  
Received Vaccine 8 2    
No Vaccine 1 6    
Unsure 6 6    
15-17 (n = 92)     64.1  
Received Vaccine 37 3    
No Vaccine 6 22    
Unsure 12 12    
18-19 (n = 56)     60.7  
Received Vaccine 25 7    
No Vaccine 2 9    
Unsure 6 7    
20-23 (n = 40)     90  
Received Vaccine 26 2    
No Vaccine 0 10    
Unsure 0 2    
All Participants Self Report (n = 217)     65.9  
Received Vaccine 96 14    
No Vaccine 9 47    
Unsure 24 27    
Table 2: Initiation of HPV Vaccination Series: Agreement of Genderand Age-Specific Self-Report to Medical Records (n=217).
Notes: Initiation=one or more doses; Of all participants self-report: sensitivity 74.4 (i.e. 96/(96+9+24)), specificity 53.4 (i.e. 47/(47+14+27)), positive predictive value 70.1 (i.e. 96/(96+14+27)), negative predictive value 58.8 (i.e. 47/(47+9+24)). Correct Recall=proportion of participants who accurately identify vaccination status (either receiving zero vaccinations, or receiving at least one vaccination) based on medical records; those who are "unsure" are incorrect. OR Female (vs. Male) 1.46, 95% CI .82-2.60. OR 20-23 to <20: 2.34, 95% CI 1.06-5.17