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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