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Table 3 Relationship between vaccination dose and the cumulative incidence rate of adverse events associated with pentavalent vaccine in children

From: Adverse events following immunization with pentavalent vaccine: experiences of newly introduced vaccine in Iran

Adverse events

Incidence (per 100 children)

RRa (95% CI)

First dose

N = 373

Second dose

N = 372

Third dose

N = 374

Swelling

79(44.6)

50(28.2)

48(27.1)

0.72(0.59–0.89)

Redness

50(40.7)

30(24.4)

43(35)

0.9(0.72–1.14)

Pain

190(38.4)

143(28.9)

162(32.7)

0.85(0.74–0.99)

Mild fever

45(31.9)

33(23.4)

63(44.7)

1.24(1.00–1.54)

High fever

1(100)

0(0)

0(0)

NA

Drowsiness

83(36.9)

72(32)

70(31.1)

0.89(0.74–1.07)

Anorexia

65(38.7)

51(30.4)

52(31)

0.87(0.71–1.06)

Restlessness

135(36.6)

115(31.2)

119(32.2)

0.9(0.77–1.05)

Vomiting

16(30.8)

19(36.5)

17(32.7)

1.02(0.73–1.44)

Long-term crying

24(38.7)

16(25.8)

22(35.5)

0.94(0.69–1.29)

Encephalopathy

0(0)

0(0)

0(0)

Not applicable

Convulsion

0(0)

0(0)

0(0)

Not applicable

History of convulsion

0(0)

1(0.2)

2(0.5)

3.45(0.5–23.74)

Family history of convulsion

0(0)

14(3.7)

6(1.6)

1.6(0.9–2.83)

  1. NA not applicable
  2. aRisk ratios values have been approximated using logistic regression analysis