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Table 3 Prevalence (N (%)) of general symptoms in study groups in the first and last year quarters

From: A controlled survey of less typical long-term consequences after an extensive waterborne epidemic

   Contaminated group Control group p-value
N = 323 N = 186
Headache 1q 54 (16.7) 23 (12.2)  
  4q 47 (14.5) 36 (19.2)  
Dizziness 1q 20 (6.2) 5 (2.7)  
  4q 12 (3.7) 6 (3.2)  
Anxiety or fear 1q 11 (3.4) 6 (3.2)  
  4q 7 (2.2) 14 (7.5)  
Fatigue 1q 58 (17.9) 22 (11.7)  
  4q 29 (9.0) 34 (18.1) 0.03
Rash 1q 38 (11.7) 10 (5.3) 0.02
  4q 23 (7.1) 16 (8.5)  
Dyspnoea 1q 14 (4.3) 3 (1.6)  
  4q 15 (4.6) 2 (1.1) 0.04
Eye irritation 1q 24 (7.4) 5 (2.7) 0.03
  4q 17 (5.3) 2 (1.1) 0.02
Heartburn 1q 27 (8.3) 6 (3.2) 0.02
  4q 23 (7.1) 12 (6.4)  
Dysuria 1q 8 (2.5) 2 (1.1)  
  4q 9 (2.8) 3 (1.6)  
Back pain 1q 35 (10.8) 13 (6.9)  
  4q 34 (10.5) 22 (11.7)  
Weight loss 1q 26 (8.0) 4 (2.1) 0.01
  4q 8 (2.5) 2 (1.1)  
Sleeping disturb. 1q 36 (11.1) 11 (5.9)  
  4q 24 (7.4) 15 (8.0)  
  1. Only p-values indicating statistical significance are shown
  2. 1q first quarter, 4q\ fourth quarter