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Table 2 Comparison of clinical and laboratory features of children in cluster 1 versus cluster 2

From: Altered microbiota associated with abnormal humoral immune responses to commensal organisms in enthesitis-related arthritis

Feature Cluster 1 Cluster 2 P-value
Number 8 17 N/A
Age, years, median, range 13, 7 to 18 13, 7.5 to 19 0.932
Male:female, number 1:7 13:4 0.007
Body mass index, median, range 20, 16 to 33 23, 16 to 41 0.374
Disease duration, years, median, range 1.6, 0 to 6.5 3, 0 to 8.2 0.238
HLA-B27+, number 3/8, 38% 6/16, 38% 1.000
Known inflammatory bowel disease, number 1, 12% 1, 5.9% 1.000
Erythrocyte sedimentation rate, number: median, range 7: 10, 6 to 50 13: 9, 3 to 56 0.536
Medications, number    
None 2, 25% 5, 29%  
Methotrexate alone 0 2, 12%  
Pentasa alone 0 1, 5.9%  
Anti-TNF +/− conventional DMARD 6, 75% 9, 53%  
  1. DMARD, disease-modifying anti-rheumatic drug; TNF, tumor necrosis factor; N/A, not applicable.