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Table 5 Impact of household income on HPV vaccine uptake according to country background

From: Time trends in HPV vaccination according to country background: a nationwide register-based study among girls in Norway

  Household income, Multivariable modela
median (NOK) RD (95% CI) P-value
Country backgroundb
 Norway 930,136 0.2 (0.1 to 0.4) <  0.001
 Europe, America, and Oceania 685,123 − 0.2 (− 0.6 to 0.3) 0.44
 Middle East and Africa 534,160 2.1 (1.2 to 3.0) <  0.001
 Asia 698,839 −0.4 (− 1.0 to 0.2) 0.19
  1. HPV Human papillomavirus, RD Risk difference, CI Confidence interval
  2. a Risk differences are estimated with linear binomial regression. The model included country background, year of birth, parental education level, household income, number of siblings, maternal age at time of daughter’s birth, region of residence, and interaction terms between country background and household income. RDs correspond to the difference in HPV vaccine uptake between households with a 200,000 NOK difference in household income
  3. b List of countries in each category is provided in the Supplementary table