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Table 1 Patterns of use of the quadrivalent HPV vaccine according to program year

From: Factors associated with initiation and completion of the quadrivalent human papillomavirus vaccine series in an ontario cohort of grade 8 girls

HPV vaccination status 2007/08
N (%)
2008/09
N (%)
Adjusted OR*
(95% CI)
P-value
Series Initiation     
   Vaccinated 721 (54.7) 704 (58.7) 1.29 (1.08-1.53) 0.04
   Unvaccinated 598 (45.3) 496 (41.3)   
Series Completion     
   Completers†† 623 (86.4) 592 (84.1) 0.88 (0.65-1.20) 0.22
   Non-Completers 98 (13.6) 112 (15.9)   
Received 1 dose 30 (4.2) 20 (2.8) N/A 0.03
Received 2 doses 68 (9.4) 92 (13.1)   
  1. OR = Odds Ratio; CI = Confidence Interval; N/A = Not Available
  2. * Adjusted for socio-demographics, vaccination history, health services utilization, and medical history
  3. (See Table 2 for details).
  4. † Statistically significant (p < 0.05)
  5. †† Includes two girls who received four doses of the vaccine.