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Table 4 Frequency of AEFI by socio-demograpic variables

From: Active surveillance study of adverse events following immunisation of children in the Czech Republic

  Number of doses Number of AEFI Rate (95CI) per 1000 doses Relative risk (95%CI) p-value
Age group
 0–11 months 27555 41 1.5 (1.1–2.0) 1 .00 <0.001*
 1–4 years 33125 35 1.1 (0.7–1.5) 0.71 (0.45–1.12)
 5–9 years 12251 76 6.2 (4.9–7.7) 4.16 (2.81–6.26)
 10–14 years 10620 23 2.2 (1.4–3.2) 1.45 (0.83–2.49)
Sex
 Boys 42611 94 2.2 (1.8–2.7) 1.05 (0.92–1.21) 0.515
 Girls 40940 81 2.0 (1.6–2.5) 1.00
Birth weight
  < 2500 g 3350 7 2.1 (0.9–4.1) 0.48–2.06) 0.497
  > 2500 g 80201 168 2.1 (1.8–2.4) 1.00
Education of mother
 Elementary 10970 19 1.7 (1.1–2.7) 1.00 0.495*
 Secondary 46332 99 2.1 (1.8–2.6) 1.22 (0.75–2.14)
 University 22470 48 2.1 (1.6–2.8) 1.22 (0.71–2.22)
 Not available 3779 9 2.4 (1.2–4.4) 1.38 (0.55–3.19)
Education of father
 Elementary 14277 20 1.4 ((0.9–2.1) 1.00 0.580*
 Secondary 41618 105 2.5 (2.1–3.0) 1.80 (1.11–3.07)
 University 21242 39 1.8 (1.3–2.5) 1.31 (0.75–2.37)
 Not available 6414 15 2.3 (1.4–3.9) 1.67 (0.79–3.43)
Place of residence
 Rural 18214 36 2.0 (1.4–2.7) 1.00 0.347
 Urban 65337 139 2.1 (1.8–2.5) 1.02 (0.94–1.10)
  1. *p-value for trend