Table 4.

Seropositivitya by HPV16 ELISA and HPV16-neutralization and HPV31-neutralization at 48 months by number of doses

1-dose (n = 78)2-doses0/1 (n = 140)2-doses0/6 (n = 52)3-doses (n = 120)
n (%)n (%)n (%)n (%)P
HPV16 ELISA78 (100)140 (100)52 (100)120 (100)0.9
HPV16 neutralization75 (96.15)137 (97.86)52 (100)117 (97.50)0.6
HPV31 neutralization19 (24.36)54 (38.57)26 (50.00)76 (63.33)<0.001
  • aPositivity defined at the laboratory determined cutoff (HPV16 ELISA = 8 EU/mL, HPV16 neutralization = 15·1 TU/mL; HPV31 neutralization = 10 TU/mL).