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Table 1 Characteristics of the study population and most prevalent HPV types

From: HLA-DRB1 Class II antigen level alleles are associated with persistent HPV infection in Mexican women; a pilot study

  N %
Study group 172 100
Age   
Monterrey as city of residence 172 100
Monterrey, N.L. as birth city 96 55.9
City of birth different from Monterrey 76 44.1
HPV positive at 2002 172 100
HPV positive for any type at 2005 34 19.7
HPV Co-infections 8 23.5
HR-HPV   61.5
LR-HPV   30.8
Unknown oncogenic risk type viruses   7.7
HPV positive at 2005 but with the same type as in 2002* 21 12.2
HPV-cleared at 2002 138 80.2
Most prevalent HPV types Type %
−83 38.1
−62 23.8
−18 19
−39, 52, 61, 84 14.3 (each)
−16, 51, 53, 81 9.5 (each)
  1. *Persistent infection.