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Table 1 Characteristics of the total population of subjects tested in the study period, by testing wave and testing outcome for acute Q fever (n = 1218)

From: Signs and symptoms do not predict, but may help rule out acute Q fever in favour of other respiratory tract infections, and reduce antibiotics overuse in primary care

  Q fever positive Q fever negative Total Positive rate
Wave 1
 Subjects tested, n 229   644   873 26.2%
 Test ordered by       
  GP, n (%) 155 (67.7) 468 (72.2)   
  Medical specialist, n (%) 72 (31.4) 170 (26.4)   
  Unknown, n (%) 2 (0.9) 6 (0.9)   
Age in years (week 13, 2009) 
  Mean (range) 49.0 (0.9–85.5) 45.1 (0.5–92.4)   
  0–19, n (%) 11 (4.8) 87 (13.5)   
  20–39, n (%) 46 (24.9) 154 (37.4)   
  40–59, n (%) 113 (49.3) 235 (36.5)   
   ≥60, n (%) 59 (25.8) 168 26.1)   
Sex, n female (%) 83 (36.2) 346 (53.7)   
Residential farm distance, mean km 5.1   6.1    
Wave 2
 Subjects tested, n 24   321   345 7.0%
 Test ordered by
  GP, n (%) 19 (79.2) 237 (79.2)   
  Medical specialist, n (%)    61 (19.0)   
  Unknown, n (%) 5 (20.8) 23 (7.2)   
 Age in years (week 13, 2009) )
  Mean (range) 46.7 (20.8–71.7) 46.8 (0–88.5)   
  0–19, n (%) 0 0 42 (13.1)   
  20–39, n (%) 4 (16.7) 60 (18.7)   
  40–59, n (%) 17 (70.8) 125 (38.9)   
   ≥60, n (%) 3 (12.5) 94 (29.3)   
Sex, n female (%) 10 (41.7) 184 (57.3)   
Residential farm distance, mean km 5.1   5.7