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Table 1 Baseline characteristics

From: A patient-reported questionnaire developed in a German early arthritis cohort to assess periodontitis in patients with rheumatoid arthritis

Variable All CAPEA patients (n = 1241) PD module patients (n = 512) Patients with dentist’s assessment (n = 353) Patients with radiograph (n = 253)
Age, years 56.2 (14.3) 56.3 (14) 55.8 (13.3) 55.8 (13.3)
Sex, female 65% (821) 67% (575) 64% (250) 67% (170)
DAS28 ESR 4.7 (1.4) 4.8 (1.4) 4.7 (1.4) 4.7 (1.4)
ESR, mm/h 31.2 (23.4) 31.8 (23.7) 31 (22.9) 30 (22)
CRP, mg/l 18.9 (31.9) 17.8 (28.4) 16.7 (22.3) 15.5 (21.4)
Number of teeth 19.2 (9.6) 19.4 (9.6) 20.8 (8.3) 21.1 (7.7)
SJC28 6 (5.2) 6 (5.2) 5.6 (4.8) 5.4 (4.7)
TJC28 9.7 (6.2) 9.5 (6) 9.2 (5.9) 9.1 (5.8)
RF positive 43% (539) 43% (370) 44% (169) 40% (103)
Anti-CCP positive 39% (493) 38% (331) 40% (157) 36% (93)
Currently smoking 33% (413) 29% (254) 27% (105) 25% (65)
  1. Baseline characteristics of all patients from the early arthritis cohort CAPEA, patients who completed the PD-module, patients with additional dentist’s assessment of PD and patients with radiographs
  2. CAPEA Course And Prognosis of Early Arthritis, PD periodontitis, RF rheumatoid factor, SJC swollen joint count, TJC tender joint count, ESR erythrocyte sedimentation rate, DAS28 Disease Activity Score including 28 joints, CRP C-reactive protein