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Table 3 Frequency (Percent) of Parents Aware and Supportive of Immunization Registries (IRs) by Child's Vaccination Status

From: Support for immunization registries among parents of vaccinated and unvaccinated school-aged children: a case control study

  Vaccinated Exempt for Any Antigens Unadjusted Odds Ratio and 95% CIa,b Number of Antigens Exempt For
     1 2–5 6–9 10
Aware of IR 66 (7.8) 18 (7.6) 0.96 (0.56–1.66) 1 (3.8) 7 (10.4) 4 (8.5) 6 (6.1)
If Aware of IR, Child Enrolled in IR 9 (26.5) 8 (65.0) 5.14 (1.68–15.71) 0 (0.0) 3 (42.9) 2 (66.7) 4 (75.0)
Support IR 652 (71.7) 80 (32.6) 0.19 (0.14–0.26) 21 (75.0) 26 (40.6) 11 (22.0) 20 (20.6)*
Aware of Law Authorizing IR 66 (6.8) 18 (6.7) 0.98 (0.57–1.67) 1 (3.2) 7 (9.6) 4 (7.3) 6 (5.4)
Support Law Authorizing IR 511 (81.6) 49 (32.0) 0.11 (0.07–0.16) 11 (84.6) 20 (46.5) 6 (18.2) 12 (18.8)*
Support Law Requiring Providers to Report to IR 494 (78.3) 55 (35.3) 0.15 (0.10–0.22) 8 (72.7) 19 (44.2) 11 (28.9) 17 (26.6)*
  1. a: Odds Ratio compares parents of children exempt to any antigens to parents of vaccinated children. Interpretation of odd ratios: Parents of exempt children who were aware of registries had about 5 times as high odds of having their child enrolled in a registry compared with parents of vaccinated children who were aware of registries.
  2. b: Odds Ratio in Bold P-Value < 0.05
  3. * Trend test is statistically significant at <0.05