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Table 2 Characteristics of questionnaire respondents with complete questionnaire response, by testing wave and testing outcome for acute Q fever (n = 453)

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
Wave 1
 Questionnaire recipients, n (% of tested) 229 (100) 391 (60.7)
 Respondents, n (response rate) 143 (62.4) 198 (50.6)
 Respondents, complete response, n (rate) 140 (97.9) 194 (98.0)
 Test ordered by
   GP, n (%) 102 (72.9) 177 (91.2)
  Medical specialist, n (%) 38 (27.1) 16 (8.2)
  Unknown, n (%) 0 (0) 1 (0.5)
 Age in years (week 13, 2009)
  Mean (range) 49.7 (5.9–85.5) 46.7 (0.8–92.4)
   0–19, n (%) 7 (5.0) 28 (14.4)
  20–39, n (%) 23 (16.4) 40 (20.6)
  40–59, n (%) 72 (51.4) 64 (33.0)
   ≥60, n (%) 38 (27.1) 62 (32.0)
Sex, n female (%) 51 (36.4) 106 (54.6)
Residential farm distance, mean km (range) 4.7 (1.9–13.1) 4.8 (1.1–11.6)
Active smoking, n (%) 49 (35.0) 47 (24.2)
Wave 2
 Questionnaire recipients, n (% of tested) 24 (100) 95 (29.6)
 Respondents, n (response rate) 19 (79.2) 94 (98.9)
 Respondents, complete response, n (rate) 18 (94.7) 91 (96.8)
 Test ordered by
   GP, n (%) 13 (72.2) 73 (80.2)
 Medical specialist, n (%)
  Unknown, n (%) 5 (26.3) 18 (19.8)
 Age in years (week 13, 2009)
   Mean (range) 47.7 (20.8–71.7) 49.1 (4.4–82.3)
  0–19, n (%) 0 0 9 (9.9)
  20–39, n (%) 3 (16.7)) 11 (12.1)
  40–59, n (%) 12 (66.7) 43 (47.3)
   ≥60, n (%) 3 (16.7) 28 (30.8)
Sex, n female (%) 8 (44.4) 56 (61.5)
Residential farm distance, mean km (range) 4.3 (1.6–7.4) 5.1 (1.2–13.1)
Active smoking, n (%) 4 (22.2) 17 (18.7)