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Table 2 Cox regression model: Hazard of HPV vaccination initiation

From: Dynamics of HPV vaccination initiation in Flanders (Belgium) 2007-2009: a Cox regression model

  Hazard ratio 95% CI
Year of birth   
   1989 19.39 17.47-21.52
   1990 11.74 10.89-12.65
   1991 4.32 4.11-4.55
   1992 (base) - -
   1993 0.61 0.55-0.67
   1994 0.37 0.33-0.41
   1995 0.21 0.19-0.24
   1996 0.23 0.20-0.25
Province   
   Antwerp (base) - -
   Limburg 1.13 1.10-1.16
   West-Flanders 0.85 0.83-0.87
   East-Flanders 0.88 0.86-0.90
   Flemish-Brabant 1.00 0.98-1.03
Preferential treatment   
   No (base) - -
   Yes 0.55 0.52-0.58
Median income neighborhood   
   Quintile 1 0.75 0.72-0.77
   Quintile 2 0.93 0.90-0.95
   Quintile 3 (base) - -
   Quintile 4 1.04 1.02 -1.07
   Quintile 5 1.10 1.07-1.12
Reimbursement regime   
   Compulsory (base) - -
   Supplementary strict 0.09 0.09-0.09
   Supplementary flexible 0.01 0.01-0.01
Letter NACM   
   No (base) - -
   Yes 2.28 2.08-2.50
Preferential treatment (Yes) * NACM reimbursement (strict or flexible) 0.55 0.47-0.64