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Table 1 Overview of question-and-answer categories regarding vaccination included in the analyses

From: Participation in and attitude towards the national immunization program in the Netherlands: data from population-based questionnaires

Question Answer categories First survey, NS First survey, Second survey, NSa Second survey,
    LVC   LVC
   N (%) N (%) N (%) N (%)
1. Did you/does your child participate in the NIP?b Yes 5951 (96) 992 (79) 4420 (94) 940 (73)
  No 143 (2) 242 (19) 141 (3) 330 (25)
  Don't knowc 109 (2) 18 (2) 127 (3) 26 (2)
   64 d 6 d 41 d 6 d
2. Do you intend to accept any remaining vaccinations for your child?e 1. Surely yes NA NA 1418 (68) 291 (46)
  2. Yes    484 (23) 148 (23)
  3. Probably yes    75 (4) 35 (5)
  4. Unsure    28 (1) 13 (2)
  5. Probably not    13 (1) 24 (4)
  6. Surely not    7 (0) 82 (13)
  7. Not applicablef    52 (3) 45 (7)
     83 d 5 d
3. Has your/parents' opinion on vaccination changed with respect to the five years preceding the survey?b 1. No 5514 (90) 1101 (89) 3866 (83) 1086 (84)
  2. Yes, more inclined 517 (8) 112 (9) 311 (7) 81 (6)
  3. Yes, less inclined 128 (2) 28 (2) 147 (3) 61 (5)
  4. Don't know NA NA 315 (7) 66 (5)
   108 d 17 d 90 d 8 d
  1. aIncluding oversampling of non-Western migrants in the NS of the second survey
  2. bIncluding participants aged less than 45 years and first-generation migrants aged less than 13 years
  3. cCategory "Don't know" was omitted from the analyses
  4. dNumber of missing answers at a specific question
  5. eIncluding participants aged less than 10 years
  6. fCategory "not applicable" was omitted from the analyses