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
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 |