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Table 4 Symptoms consistent with sequelae of Y. enterocolitica infection (reactive arthritis, erythema nodosum, conjunctivitis) in yersiniosis patients (N=351) and “sequelae-like” symptoms in a population-based reference group (N=819), Germany 2009-2010

From: Clinical aspects and self-reported symptoms of sequelae of Yersinia enterocolitica infections in a population-based study, Germany 2009–2010

Symptom Yersiniosis patients n (%) Reference group n (%) Risk ratioa(95% confidence interval) P value (Wald test)
Any symptom of sequelae 62 (19.1) 67 (8.3) 2.3 (1.7 3.2) <0.001
Any symptom of reactive arthritis 41 (12.4) 39 (4.8) 2.6 (1.7 -3.9) <0.001
    Joint pain 20 (5.9) 19 (2.3)   
    Joint swelling 9 (2.6) 1 (0.1)   
    Lower back pain 15 (4.5) 11 (1.4)   
    Buttocks pain 8 (2.4) 2 (0.3)   
    Heel pain 7 (2.1) 11 (1.4)   
    Morning joint or back stiffness lasting >1 hour 4 (1.2) 3 (0.4)   
Erythema nodosum 11 (3.2) 1 (0.1) 25.1 (3.3-194.7) 0.002
Conjunctivitis/iritis 16 (4.6) 29 (3.6) 1.2 (0.7-2.3) 0.465
  1. aadjusted for age group and sex in a log-binomial regression model.