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Table 4 Adverse events following influenza vaccination by age group, sex and reaction to non-influenza vaccines

From: Comparison of response rates on invitation mode of a web-based survey on influenza vaccine adverse events among healthcare workers: a pilot study

   Adverse event after influenza vaccine  
Total No AE Local AE only Systemic AE Recurrent systemic AE p-value
Overall 386 (100.0)a 287 (74.4) 29 (7.5) 48 (12.4) 22 (5.7)  
Invitation Mode
 Email 218 (56.5) 153 (70.2) 15 (6.9) 34 (15.6) 16 (7.3)  
 Post 168 (43.5) 134 (79.8) 14 (8.3) 14 (8.3) 6 (3.6) 0.05
Length
 Short version 180 (46.6) 121 (67.2) 18 (10.0) 31 (17.2) 10 (5.6)  
 Longer version 206 (53.4) 166 (80.6) 11 (5.3) 17 (8.3) 12 (5.8) 0.01
Format
 Closed-ended 187 (48.4) 141 (75.1) 15 (8.0) 18 (9.6) 13 (7.0)  
 Open-ended 199 (51.6) 146 (73.4) 14 (7.0) 30 (15.1) 9 (4.5) 0.32
Ageb
 18–49 yrs 155 (40.3) 106 (68.4) 11 (7.1) 28 (18.1) 10 (6.5)  
  ≥ 50 yrs 230 (59.7) 180 (78.3) 18 (7.8) 20 (8.7) 12 (5.2) 0.05
Sex
 Female 303 (78.5) 224 (74.0) 23 (7.6) 35 (11.6) 21 (6.9)  
 Male 83 (21.5) 63 (75.9) 6 (7.2) 13 (15.7) 1 (1.2) 0.17
Ageb and Sex
 Female 18–49 yrs 123 (32.0) 85 (69.1) 9 (7.3) 19 (15.5) 10 (8.1)  
 Male 18–49 yrs 32 (8.3) 21 (65.6) 2 (6.3) 9 (28.1) 0  
 Female ≥50 yrs 180 (46.8) 139 (77.2) 14 (7.8) 16 (8.9) 11 (6.1)  
 Male ≥50 yrs 50 (13.0) 41 (82.0) 4 (8.0) 4 (8.0) 1 (2.0) 0.11
AE after non-influenza vaccines
 Yes 58 (15.0) 33 (56.9) 11 (19.0) 7 (12.1) 7 (12.1)  
 No 248 (64.3) 208 (83.9) 10 (4.0) 21 (8.5) 9 (3.6)  
Don’t recall/No answer 80 (20.7) 46 (57.5) 8 (10.0) 20 (25.0) 6 (7.5) < 0.001
  1. Abbreviations: AE: Adverse event; yrs.: Years
  2. *P < 0.025 when comparing recurring systemic adverse events by factor
  3. arespondent had no description of his/her adverse event
  4. brespondent provided no data for age