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Table 4 Effect of living distance on the phase I and II IgG antibody titres

From: Persistent high antibody titres against Coxiella burnetiiafter acute Q fever not explained by continued exposure to the source of infection: a case-control study

Living distance from infected farm in meters, within case-control study †

phase I IgG <1:1,024 / ≥1:1,024

phase II IgG <1:1,024 / ≥1:1,024

OR (95% CI)

p-value

OR (95% CI)

p-value

>5,000

ref*

ref*

ref*

ref*

>2,000 - 5,000

0.42 (0.16 - 1.11)

0.079

0.59 (0.23 - 1.51)

0.274

0 - 2,000

0.67 (0.33 - 1.36)

0.264

1.00 (0.46- 2.18)

0.992

Living distance from infected farm in meters, within Q-HORT study ¥

phase I IgG <1:1,024 / ≥1:1,024

phase II IgG <1:1,024 / ≥1:1,024

OR (95% CI)

p-value

OR (95% CI)

p-value

>5,000

ref*

ref*

ref*

ref*

>2,000 - 5,000

0.52 (0.28 - 0.93)

0.029

0.98 (0.76 - 1.25)

0.843

0 - 2,000

0.65 (0.41 - 1.03)

0.066

0.98 (0.79 - 1.22)

0.857

  1. *ref = reference category.
  2. †Case-control study exists of acute and possible chronic Q fever patients from the Jeroen Bosch Hospital, Bernhoven Hospital and Laboratory for Pathology and Medical Microbiology.
  3. ¥Q-HORT study exists of acute Q fever, possible, probable and proven chronic Q patients from the Jeroen Bosch Hospital, Bernhoven Hospital and Laboratory for Pathology and Medical Microbiology.