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Table 1 Adverse events following influenza immunisation reported by pregnant and non-pregnant women – FASTMum, Western Australia, Australia, 19 March-15 May 2014

From: A prospective cohort study comparing the reactogenicity of trivalent influenza vaccine in pregnant and non-pregnant women

  Pregnant (n = 947) Non-pregnant (n = 275) Fisher’s exact test p-value AOR p-value
  n Percent (95% CI) n Percent (95% CI)
Any reaction** 141 13.0 (11.0-15.0) 51 17.5 (13.1-21.8) .19 .33
Systemic reaction 85 9.0 (7.1-10.8) 28 10.2 (6.6-13.8) .55 .36
Fever 15 1.6 (0.8-2.4) 16 5.8 (3.0-8.6) <.01* <.01*
Headache 27 2.9 (1.8-3.9) 13 4.7 (2.2-7.3) <.01* .04*
Fatigue 40 4.2 (2.9-5.5) 13 4.7 (2.2-7.3) .74 .68
Vomiting 7 0.7 (0.2-1.3) 0 (0.0-0.7) .36 .95
Rigors 5 0.5 (0.1-1.0) 2 0.7 (0.0-1.7) .66 .89
Cold/flu-like 37 3.9 (2.7-5.1) 10 3.6 (1.4-5.9) .50 .69
Myalgia 11 1.2 (0.5-1.8) 5 1.8 (0.2-3.4) .37 .71
Nausea 8 0.8 (0.3-1.4) 1 0.4 (0.0-1.1) .69 .59
Malaise 4 0.4 (0.0-0.8) 1 0.4 (0.0-1.1) .69 .51
Local reaction 45 4.8 (3.4-6.1) 20 7.3 (4.2-10.4) .13 .13
Other reaction 6 0.6 (0.1-1.1) 2 0.7 (0.0-1.7) .57 .89
  1. **Any reaction was defined as replying “yes” to the question “did you experience any fever, illness, or reaction following your vaccination?”.
  2. *Significant at α = .05.
  3. AOR, adjusted odds ratio – adjusted for age and residence (metropolitan/non-metropolitan).
  4. CI, confidence interval.