Figure 3. Variable importance ranking among teenagers (combined model) in study of vaccination intent regarding IMD caused by Neisseria meningitidis strain W135, the Netherlands, 2018–2019. The 25 strongest predictors (i.e., knowledge and belief items [Table] and control variables) are ranked top to bottom, based on their ability to predict meningococcal conjugate (MenACWY) vaccination intention among teenagers with a parent in the sample. This model includes both the knowledge and beliefs (Table) of teenagers, as well as the knowledge, beliefs, and MenACWY vaccination intention of their parents and the control variables from both groups as independent variables. Control variables are age, sex, education, income, region, social class, region of residence, vaccination record of the teenager, whether the respondent was aware of the MenACWY vaccination campaign, and whether teenagers and their parents were part of the first MenACWY vaccination target group (cohorts 2004–2005) or the second MenACWY vaccination target group (cohorts 2001–2003). IMD, invasive meningococcal disease.